Navigation Links
NRL scientists demonstrate infrared light modulation with graphene

WASHINGTON - Research scientists at the U.S. Naval Research Laboratory (NRL) Electronics Science and Technology Division in collaboration with researchers at University at Buffalo-The State University of New York (SUNY) demonstrate the possibility for new optical devices using graphene for communications, imaging and signal processing.

NRL research in the development of future optoelectronic devices demonstrates infrared light modulation with graphene with the impact for high-speed phase and amplitude modulators from the mid-infrared to terahertz (THz) wavelengths. The results of this work open the possibility for new optical devices using graphene for communications, imaging and signal processing.

"The realization of a tunable graphene polarizer has the potential to greatly enhance current infrared polarization modulation devices that are crucial to molecular sensing and identification, also playing a key role in infrared free space communications," said Dr. Joseph Tischler, research physicist, NRL Solid Sate Devices Branch.

Although graphene has generated considerable interest since its discovery due to its remarkable properties that led to the Nobel Prize in Physics in 2010, one of its properties has been overseen. Electrons in graphene in the presence of a magnetic field can strongly change light intensity (amplitude modulation) or rotate the light polarization (phase modulation).

Electrons in graphene rotate in quantized circular orbits under a magnetic field in the so-called Landau Levels. Light will excite these electrons from one orbit to another and the electrons, behaving as if they are moving at the speed of light, will re-emit this light with a different amplitude and/or polarization.

"Although we have controlled this effect with an external magnetic field, the same can be done by changing the amount of electrons with a gate and keeping the magnetic field constant. This would allow for fast modulation, possibly reaching terahertz speeds," added Dr. Chase Ellis, National Research Council postdoctoral, NRL Solid State Devices Branch.

Aside from the technological impact of this work, the group has developed a non-invasive, ultrasensitive 'fingerprinting' tool. This tool allows for the use of new analysis techniques.and identification and characterization of different graphene multilayers by measuring the polarization of reflected light from graphene in a magnetic field, even if they are covering up one another.

This work successfully tested three different theories predicting rich properties for single and multilayer graphene and determined important parameters characterizing multilayer graphene, some of which had never been measured before.


Contact: Daniel Parry
Naval Research Laboratory

Related biology technology :

1. Scientists develop way to successfully give nanoparticle therapeutics orally
2. Biomedical Research Foundation (BRF) Recruits Two Eminent Scientists --Pradeep Garg, Ph.D., And Sudha Garg, Ph.D. -- To Run Newly-Created Louisiana Center For Molecular Imaging And Therapy
3. Scientists create perfect solution to iron out kinks in surfaces
4. Scientists invent self-healing battery electrode
5. Stanford scientists create a low-cost, long-lasting water splitter made of silicon and nickel
6. Three World-Renowned Philadelphia Scientists Are Named As Recipients Of The 2013 John Scott Award
7. Key Findings from Social Media and Email Best Practices Guide for Marketing to Life Scientists
8. Scientists Capture Most Detailed Picture Yet of Key AIDS Protein
9. UMass Amherst polymer scientists jam nanoparticles, trapping liquids in useful shapes
10. BioInformatics, LLC New Market Research Report – Social Media and Email Best Practices Guide for Marketing to Life Scientists
11. Launches New Blog to Help Scientists Find Liquid Handling Answers
Post Your Comments:
Related Image:
NRL scientists demonstrate infrared light modulation with graphene
(Date:11/30/2015)... 30, 2015 /PRNewswire/ - Zenith Epigenetics Corp. ("Zenith" or the ... C.W. Wong to its Board of Directors to replace ... with a wealth of experience as co-founder of Resverlogix, with ... --> --> Dr. Wong remarked, ... of directors. Zenith,s long standing expertise in epigenetics and the ...
(Date:11/30/2015)... -- TapImmune, Inc. (TPIV), a clinical-stage ... and gene-based immunotherapeutics and vaccines for the treatment of ... presenting at the 8 th Annual LD Micro ... PT. Dr. John N. Bonfiglio a TapImmune ... presentation and will join TapImmune management in meeting with ...
(Date:11/30/2015)... 2015  Northwest Biotherapeutics (NASDAQ: NWBO ) ("NW ... therapies for solid tumor cancers, announced today that the ... and the Company welcomes Neil Woodford,s call ... anonymous internet report on NW Bio.  The Company,s Board ... Powers stated, "We agree with Mr. Woodford that, ...
(Date:11/27/2015)... , ... November 27, 2015 , ... ... that includes over 2,000 technical presentations offered in symposia, oral sessions, workshops, ... applied spectroscopy, covers a wide range of applications such as, but not limited ...
Breaking Biology Technology:
(Date:11/4/2015)... York , November 4, 2015 ... a new market report published by Transparency Market Research "Home ... Growth, Trends and Forecast 2015 - 2022", the global home ... US$ 30.3 bn by 2022. The market is estimated ... forecast period from 2015 to 2022. Rising security needs ...
(Date:10/29/2015)... RESTON, Va. , Oct. 29, 2015 ... announced today that it has released a new version ... Daon customers in North America ... gains. IdentityX v4.0 also includes a FIDO UAF ... customers are already preparing to activate FIDO features. These ...
(Date:10/29/2015)... , Oct. 29, 2015 Today, ... a partnership with 2XU, a global leader in ... a smart hat with advanced bio-sensing technology. The ... athletes to monitor key biometrics to improve overall ... partnership, the two companies will bring together the most ...
Breaking Biology News(10 mins):