Photonics

Biophotonics (21)
Nanophotonics (38)
Photonic computing (10)
Photonic crystal (42)
Photonic devices (158)
Photonic integrated circuit (11)
Photonic metamaterial (6)
Photonic system (5)
Photonics (149)
Silicon photonics (34)

Synopsis: Domenii: Photonics & laser: Photonics & laser generale: Photonics:

Her study is published in the Advance Online Publication (AOP) on Nature Photonics's website on January 19, 2015."

but they say theye made a breakthrough that could take thermophotovoltaics far beyond where it gone before. mit thermophotovoltaics MIT nanophotonic solar thermophotovoltaic device, with an array of multialled carbon nanotubes as the absorber, a oneimensional silicon/silicon dioxide photonic crystal as the emitter

T) he team inserted a two-layer absorber-emitter device made of novel materials including carbon nanotubes and photonic crystals between the sunlight and the PV cell.

This layer is bonded tightly to a layer of a photonic crystal, which is engineered precisely so that when it is heated by the attached layer of nanotubes,

photonic crystal fibre (PCF) lasers offer better and more accurate beam quality, are highly efficient, use less power,

The researchers say silicon photonics is a powerful technology. Silicon photonics have the potential to bring the large-scale manufacturing of CMOS to photonic devices that are not cheap

because the technology is missing. Another challenge to silicon photonics is the lack of optical sources on silicon, the base material on CMOSS, according to the researchers.'

'We can overcome this problem by bonding III-V material, necessary for active light sources, onto a silicon wafer and then coprocessing the two,

'Commenting on the results, CEA-Leti France Photonics Program Manager, Laurent Fulbert, says:''We are proud to jointly present with III-V lab the results of the integrated silicon photonics transmitter and the tuneable laser.

The ability to integrate a tuneable laser, a modulator and passive waveguides on silicon paves the way of further developments on integrated transceivers that can address several application needs in metropolitan and access networks, servers, data centres,

#Euro-Indo collaboration develops new photodetector Photodetectors that analyse scattered light in the ultraviolet (UV) range of the spectrum are used often in situations where the rapid detection of hazardous biological

To this end, photodetectors with an extremely narrow bandwidth are required, which only respond to particular wavelengths.

This means its bandwidth is five times narrower than that of a comparable photodetector. The device is also sensitive to polarised light,

while the photodetector was produced at the Universidad Polotécnica de Madrid in Madrid, Spain by Carlos Rivera, Jose Luis Pau and Eliaz Munoz.

A large number of photodetectors, with very narrow bandwidths, is necessary so as to simultaneously detect as many different substances as possible.

The photodetector developed by the international consortium is merely the size of a pin head

In collaboration with BD Technologies and Nexgen Arrays a start-up based at the Photonics Center and run by longtime SP-IRIS developers David Freedman

The technique, reported in Nature Photonics, could eventually be used in human clinical trials, Hong says,

Better image quality For the current study, published online in Nature Photonics, the researchers validated the performance of DOT by comparing its results to fmri scans.

For instance colloidal dispersions comprise such everyday items as paint milk gelatin glass and porcelain and for advanced engineering such as steering light in photonics.

and reversing the effects of loss in various other physical systems such as in photonic crystal activities plasmonic structures and metamaterials.

The experimental system that the researchers used consists of two tiny directly coupled silica microtoroid (doughnut-shaped) resonators each coupled to a different fiber-taper coupler that aids in guiding light from a laser diode to photodetectors;

and flexible electronic devices to harvest solar energysays Luyao Lu a graduate student in chemistry and lead author of a paper in the journal Nature Photonics that describes the result.

and director of Rice university s Laboratory for Nanophotonics. e know cephalopods have some of the same proteins in their skin that we have in our retinas so part of our challenge as engineers is to build a material that can see light the way their

For example Halas and colleagues published a study in Advanced Materials in August about an aluminum-based CMOS-compatible photodetector technology for color sensing.

#Squid skin inspires eyelike photodetector Rice university rightoriginal Studyposted by Jade Boyd-Rice on August 27 2014the technology behind a new type of photodetector mimics the way squid likely sense colors.

Based on that hypothesis Bob Zheng a graduate student at Rice university set out to design a photonic system that could detect colored light.

The photodetector which sees colors in much the same way the human eye does uses an aluminum grating that can be added to silicon photodetectors with the silicon microchip industry s mainstay technology omplementary metal-oxide

The new device was created by researchers at Rice s Laboratory for Nanophotonics (LANP) and is described in a new study in the journal Advanced Materials.

Conventional photodetectors convert light into electrical signals but have no inherent color-sensitivity. To capture color images photodetector makers must add color filters that can separate a scene into red green and blue color components.

This color filtering is done commonly using off-chip dielectric or dye color filters which degrade under exposure to sunlight

Zheng s color photodetector uses a combination of band engineering and plasmonic gratings comb-like aluminum structures with rows of parallel slits.

which is a common technique in CMOS processing Zheng deposited a thin layer of aluminum onto a silicon photodetector topped with an ultrathin oxide coating.

Color selection is performed by utilizing interference effects between the plasmonic grating and the photodetector s surface.

and the width and spacing of the slits Zheng was able to preferentially direct different colors into the silicon photodetector

and is now a postdoctoral fellow at Harvard university. ll we have to remove is some hair. he techniqueâ reported in Nature Photonics could eventually be used in human clinical trials Hong says

The study is published online in Nature Photonics. The National Science Foundation and the Air force Office of Scientific research funded the work e

Nanostructured metamaterials however are making it possible to reduce the wavelength of light allowing the creation of new types of nanophotonic devices says Vladimir M. Shalaev scientific director of nanophotonics at Purdue s Birck Nanotechnology Center

but the recipe can be applied to a variety of materials with potential applications in the fields of materials science photonics electronics

roles of photonics and electronics. urrently electronics perform signal processing while photonics rule in transporting information from one place to another over fiber-optic cable.

Eventually oscillators in high-performance electronics systems while outwardly appearing to be electronic devices will internally be purely opticalvahala says. he technology that Kerry

Biophotonic Solutions is a high-tech company Dantus launched in 2003 to commercialize technology invented by his research group.

Yang is senior author on a paper in the journal Nature Photonics that describes the new imaging strategy.

director of the Laboratory for Nanophotonics (LANP) at Rice university. olar steam efficiency at converting sunlight directly into steam opens up new possibilities for off-grid sterilization that simply aren available today In a previous study last year,

#Nature inspires color-sensitive CMOS-compatible photodetector Researchers at Rice university's Laboratory for Nanophotonics (LANP) have developed a new image sensor that mimics the way we see color by integrating light amplifiers and color

and other photodetectors used in cameras. Conventional image sensors work by first converting light into electrical signals then combining that information with the red green

LANP graduate student Bob Zheng set out to create a photonic system that could detect colored light but in what lab director Naomi Halas calls a great example of the serendipity that can occur in the lab he wound up with a device with far broader applications.

Zheng's color photodetector consists of an ultra-thin oxide coating atop a thin layer of aluminum that was deposited onto a silicon photodetector using a common technique called electron-beam evaporation.

and the width and spacing of the slits the device is able to preferentially direct different colors into the silicon photodetector

The plasmonic gratings don't just help the photodetector filter color; they also interact with each other thereby increasing the amount of light absorbed (and thus potentially reducing noise.

and in the ultra-small cavities of photonic crystals#components of chip-based lasers and light-emitting diodes."

The company s technology is a three-by three-millimeter microelectronic chip (0. 1-millimeter thick) containing about 1, 500 light-sensitive photodiodes,

Stanford university researchers are in the early stages of developing self-powered retinal implants where each pixel in the device is fitted with silicon photodiodes.

Patients would wear goggles that emit near-infrared pulses that transmit both power and data directly to the photodiodes.

The researchers reported on the plausibility of their design in the May 2012 issue of Nature Photonics,

describing in vitro electrical stimulation of healthy and degenerate rat retina by photodiodes powered by near-infrared light.

As for future plans, Anstie of the University of Adelaide Institute for Photonics and Advanced Sensing expects to have a working prototype of the device within three years and a market-ready product within five years.

The material is a two-dimensional metallic dielectric photonic crystal and has the additional benefits of absorbing sunlight from a wide range of angles

The sensor of a digital camera consists of an array of photodetectors millions of them, even in commodity devices.

so that it reads off the measurements of one row of photodetectors at a time. Ordinarily, that not a problem

The company s current CEO is photonics entrepreneur Parviz Tayebati. Today the WBC-based Terablade is a laser module that contains diode laser bars (long arrays of diode lasers) a transform lens a diffraction grating and an output lens.

At the time he was working on various photonics projects lasers solar cells and optical fiber that all involved a phenomenon called resonant coupling.

And the ground receiver is based on arrays of small inexpensive telescopes that are coupled fiber to highly efficient superconducting nanowires a photon counting technology that was brought to its high state of maturity by joint MIT and Lincoln Lab teams.

(and paper co-author) Yoel Fink and his team, for use in photonics and other applications.

Paras Prasad, Phd, executive director of UB's Institute for Lasers, Photonics and Biophotonics (ILPB; and Guanying Chen, Phd, a researcher at ILPB and Harbin Institute of technology in China.

The Pop wrapper has biophotonic qualities that make it a great match for fluorescence and photoacoustic imagining.

Photonic systems could eventually replace electronic ones, but the fundamentals of computation, mixing two inputs into a single output, currently require too much space and power when done with light.

Controlling photoluminescence with silicon nanophotonics for better device e

#Micro-and nano-swimmers can be propelled through media similar to bodily fluids Micro -or even nanorobots could someday perform medical tasks in the human body.

#Method for symmetry-breaking in feedback-driven self-assembly of optical metamaterials (Phys. org) If you can uniformly break the symmetry of nanorod pairs in a colloidal solution you're a step ahead of the game toward achieving new and exciting metamaterial properties.

Zhang and his group demonstrated self-assembled optical metamaterials with tailored broken-symmetries and hence unique electromagnetic responses that can be achieved via their new method.

The paper is titled Feedback-driven self-assembly of symmetry-breaking optical metamaterials in solution. We developed an innovative self-assembly route

As a demonstration in our paper we have synthesized a new class of symmetry-breaking optical metamaterials that have isotropic electromagnetic responses

This new kind of optical switch has the potential to revolutionize nanophotonics. The researchers have published now their work in the journal Science.

"The method could be applied to integrated optical circuits. Such systems may one day replace the electronic circuits we are using today

The material is a two-dimensional metallic dielectric photonic crystal and has the additional benefits of absorbing sunlight from a wide range of angles

#Controlling photoluminescence with silicon nanophotonics for better devices Silicon nanowires have a great deal of potential in future high-performance electronic sensing and energy devices.

However unlike graphene TMDCS can also emit light allowing applications such as photodetectors and light emitting devices to be manufactured.

A team of physicists headed by Frank Vollmer of the Laboratory for Nanophotonics and Biosensors at the Max Planck Institute for the Science of Light has succeeded now in amplifying the interaction of light with DNA molecules to the extent that their photonic biosensor can be used to observe single unlabelled molecules and their interactions.

On each side of the seesaw benches researchers etched an array of holes called photonic crystal cavities.

Combining electronics and photonics on the same integrated circuits could drastically improve the performance and efficiency of mobile technology.

K. Goodfellow R. Beams C. Chakraborty L. Novotny A n. Vamivakas Integrated nanophotonics based on nanowire plasmons and atomically-thin material Optica Vol. 1 Issue

#Ultrafast graphene based photodetectors with data rates up to 50 GBIT/s In cooperation with Alcatel Lucent Bell labs researcher from AMO realized the worldwide fastest Graphene based photodetectors.

In the current work Graphene based photodetectors were integrated in a conventional silicon photonic platform designed for future on-chip applications in the area of ultrafast data communication.

In addition the specific features of Graphene-based photodetectors like dark current free and high speed operation

not only set a new benchmark for graphene based photodetectors but also demonstrate for the first time that Graphene based photodetectors surpass comparable detectors based on conventional materials concerning maximal data rates.

The work was supported by the European commission through the Flagship project Graphene and the integrated project Grafol as well as the DPG supported project Gratis.

The publication is published in the international renowned journal ACS Photonics and was chosen as Editor's Choice article.

50 GBIT/s photodetectors based on wafer-scale graphene for integrated silicon photonic communication systems. ACS Photonics Just Accepted Manuscript.

DOI: 10.1021/ph500160 6

#Graphene reinvents the future For many scientists the discovery of one-atom-thick sheets of graphene is hugely significant something with the potential to affect just about every aspect of human activity and endeavour.

The separation of photoexcited electrons and holes is essential for driving an electrical current in a photodetector or solar cell."

not only for photonics and optoelectronics, but also for photovoltaics.""MX2 semiconductors have extremely strong optical absorption properties

#Biomimetic photodetector'sees'in color (Phys. org) Rice university researchers have created a CMOS-compatible biomimetic color photodetector that directly responds to red green

The new device was created by researchers at Rice's Laboratory for Nanophotonics (LANP) and is described online in a new study in the journal Advanced Materials.

It uses an aluminum grating that can be added to silicon photodetectors with the silicon microchip industry's mainstay technology complementary metal-oxide semiconductor or CMOS.

Conventional photodetectors convert light into electrical signals but have no inherent color-sensitivity. To capture color images photodetector makers must add color filters that can separate a scene into red green and blue color components.

This color filtering is done commonly using off-chip dielectric or dye color filters which degrade under exposure to sunlight

The color photodetector resulted from a $6 million research program funded by the Office of Naval Research that aimed to mimic cephalopod skin using metamaterials compounds that blur the line between material and machine.

Based on that hypothesis LANP graduate student Bob Zheng the lead author of the new Advanced Materials study set out to design a photonic system that could detect colored light.

Zheng's color photodetector uses a combination of band engineering and plasmonic gratings comb-like aluminum structures with rows of parallel slits.

which is a common technique in CMOS processing Zheng deposited a thin layer of aluminum onto a silicon photodetector topped with an ultrathin oxide coating.

Color selection is performed by utilizing interference effects between the plasmonic grating and the photodetector's surface.

and the width and spacing of the slits Zheng was able to preferentially direct different colors into the silicon photodetector

Not only are we using the photodetector as an amplifier we're also using the plasmonic color filter as a way to increase the amount of light that goes into the detector he said.

It's like having an extremely powerful magnifying glass made out of gold said Professor Jeremy Baumberg of the Nanophotonics Centre at Cambridge's Cavendish Laboratory who led the research.

and characterize inkjet printed 2d crystal-based flexible photodetectors and study their integration with commercial electronics.

Photodetectors are needed in cameras automotive applications sensing and telecommunications medical devices and security he says. If these could be made flexible they could be integrated in clothes rolled up

and insulating properties with a faster response time outperforming the current organic semiconducting inks enabling printed flexible photodetectors

Mos2) due to their 2d nature electrons and holes are generated with a higher efficiency than the current photodetectors based on siliconthe project funded by the National Natural science Foundation of China looks into how to design printed flexible photodetectors

#Nanophotonics experts create powerful molecular sensor Nanophotonics experts at Rice university have created a unique sensor that amplifies the optical signature of molecules by about 100 billion times.

Researchers at Rice's Laboratory for Nanophotonics (LANP) said the single-molecule sensor is about 10 times more powerful that previously reported devices."

the SECARS technique employs a more complex multiphoton process.""Zhang said the additional amplification gives SECARS the potential to address most unknown samples.

A photonic crystal fiber was used to generate (quasi-white light) supercontinuum to probe the spectral response of select regions within the array.

This interaction enables the energy transfer between the internalized molecules says Raymo director of the UM laboratory for molecular photonics.

Subramani Swaminathan and Janet Cusido from the UM's Laboratory for Molecular Photonics Department of chemistry in the College of Arts and Sciences;

and Synthesis of 3d Nanostructures in the Quantum Electronics and Photonics Division is that if you deform them even a little bit

#Graphene photonics breakthrough promises fast-speed low-cost communications Swinburne researchers have developed a high-quality continuous graphene oxide thin film that shows potential for ultrafast telecommunications.

Associate professor Baohua Jia led a team of researchers from Swinburne's Centre for Microphotonics to create a micrometre thin film with record-breaking optical nonlinearity suitable for high performance integrated photonic devices used in all-optical communications, biomedicine

and photonic computing.""Such a laser patternable highly nonlinear thin film, about one hundredth of a human hair, has not been achieved by any other material,

"Current manufacturing methods in semiconductor labs require expensive cleanrooms to fabricate photonic chips. The fabrication and laser writing of this photonic material is simple and low cost."

To build the sensors the researchers align an array of microlenses an array of photodetectors

"Frequency-Division Multiplexing in the Terahertz Range Using a Leaky-Wave Antenna,"in Nature Photonics on September 14.

Interest in so-called photonic chips goes back decades and it easy to see why. When electrons move through the basic parts of a computer chipogic circuits that manipulate data,

And, as they report this week in Nature Photonics, by varying the intensity of their data-writing pulses,

if a more advanced photonic memory can be integrated with photonic logic and interconnections, the resulting chips have the potential to run at 50 to 100 times the speed of today computer processors f

#Silicon photonics meets the foundry Advances in microprocessors have transferred the computation bottleneck away from CPUS to better communications between components.

Using photonics technology for I/O components can both improve performance and reduce energy consumption. But to be commercially viable these photonic

MIT professor of materials science and engineering and director of the MIT Microphotonics Center. e don look at this the way we still look at fiber,

And with funding from the National Institute for Standards and Technology, the Microphotonics Center joined with the International Electronics Manufacturing Initiative to create the Photonics System Manufacturing Consortium,

which aims to develop a viable roadmap for manufacturing integrated photonics on silicon. Cutting costs to shed lightright now the optical transceiver is moving onto the circuit board;

and cost is the one that really controlling the entry of photonics into the system.?

The more photonics components go into a system, the cheaper they have to be in order for the system to be affordable,

on the photonics side, is the difference in design paradigms between computing and optics. In computers, Kimerling explains,

The hope with silicon photonics is that we can take the best from silicon integrated circuits including that design discipline to establish a process design kit that includes all the rules as to how to build a component,

His group develops energy-efficient photonics, nd the way we do that is to miniaturize the devices,

the photonics occupy a negligible footprint on the chip. e and his colleagues are now working to demonstrate full-scale multi-core computing with an entire computer that uses only photons to communicate with memory,

and materials for the photonics. ne offshoot of this is intellectual property that will make it possible for any company with a great application for photonics

Making material progressover time, new materials and devices will provide far more powerful integration of photonics on silicon.

Overall, the MIT patent portfolio in silicon photonics has grown to more than 60 patents that cover functions such as on-chip lasers, modulators and demodulators, and sensors.

The key enabling device in a pixel is the photodiode, which produces an electric current when exposed to light.

The same photodiode is used also in solar panels to convert incident light to electric power. The photodiode in a camera pixel is used in the photoconductive mode

while in a solar cell it is used in the photovoltaic model. Nayar, working with research engineer Daniel Sims BS'14 and consultant Mikhail Fridberg of ADSP Consulting, used off-the-shelf components to fabricate an image sensor with 30x40 pixels.

each pixel's photodiode is operated always in the photovoltaic mode. The pixel design is very simple,

the team shone an infrared laser at Alice's photodetector for up to 30 s after disconnecting the fibre channel,

The researchers discovered that they could burn a hole in the photodiode detector and render it either partially

In this case, the impaired sensitivity of the photodetector can increase Bob's odds of being able to successfully cheat above

In this case, the exceptional rings were found in a slab of nanostructured material called a photonic crystal.

where multiphoton microscopy for biological applications was pioneered. hese alumni embody the ebb Groupstyle of mixing physics,

publishing their invention in Nature Photonics s

#Real-time Nanoscale Images of Lithium Dendrite Structures That Degrade Batteries Scientists at the Department of energy Oak ridge National Laboratory have captured the first real-time nanoscale images of lithium dendrite structures known to degrade lithium

#New Nanosheet-Based Photonic crystal Changes Color in Response to Moisture LMU chemists have developed a photonic crystal from ultrathin nanosheets

Unparalleled sensitivity and response time Photonic crystals are arranged periodically nanostructures which have the ability to reflect, guide and confine light.

Lotsch and her team have developed now photonic crystals based on nanosheets of phosphatoantimonic acid. The new nanomaterial is extremely moisture sensitive and at the same time chemically stable,

The produced optical rectennas hold promise as photodetectors that do not require cooling and energy harvesters that could be used for conversion of waste heat to electricity.

however the team aims to grow rectennas on foil or other suitable materials for developing flexible photodetectors and solar cells.

The material reacts to the humidity change within a few milliseconds This is a property that is fundamentally well known and characteristic of so-called photonic crystals.

and provides excellent time response. aving heard that SUNY Poly CNSE leading-edge researchers are deeply involved with photonics-based sensors,

Albert Polman, one of the pioneers in the field of nanophotonics, at the Center for Nanooptics

Smart devices such as smart glasses, smart watches and smartphones equipped with photodiodes communicate using VLC.

or any on-body devices or sensors that users have to constantly wear or carry, just LED LIGHTS on the ceiling and photodiodes on the floor.

They built the-first-of-its-kind light sensing testbed in the Dartnets lab using off-the-shelf LED LIGHTS, photodiodes, and microcontrollers.

they designed an algorithm to reconstruct human postures using 2-D shadow information with a limited resolution collected by photodiodes embedded in the floor."

Their results are published in the journal Nature Photonics on 19 october. Both cardiac cells in the heart and neurons in the brain communicate by electrical signals,

In response to this problem the engineers developed a visibly transparent overlay more technically a silica photonic crystal overlay that increases solar cell efficiency by radiating the heat of cells away from them much like how we naturally radiate heat from our bodies to prevent overheating.

This is where researchers at Photonics Systems Laboratory (PHOSL) come in. In an article published in Light:

Their results are published in the journal Nature Photonics on 19 october. Both cardiac cells in the heart and neurons in the brain communicate by electrical signals,

and is described in the journal Nature Photonics.""Light doesn't typically like to be squeezed or manipulated but this metamaterial permits you to manipulate light from one chip to another, to squeeze,

"In this structure--unlike other photodetectors--light absorption in an ultrathin silicon layer can be much more efficient

graduate student Jayer Fernandes and recent graduate Aditi Kanhere--are exploring ways to integrate the lenses into existing optical detectors and directly incorporate silicon electronic components into the lenses themselves s

graduate student Jayer Fernandes and recent graduate Aditi Kanhere--are exploring ways to integrate the lenses into existing optical detectors and directly incorporate silicon electronic components into the lenses themselves s

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