Nanotechnology Now







Heifer International

Wikipedia Affiliate Button


DHgate

Home > Press > Broadband photodetector for polarized light: Rice, Sandia team uses carbon nanotubes for polarized-light detection

These schematic diagrams depict the fabrication process for p-n junction photodectors using flattened, highly aligned nanotube carpets.

CREDIT: X. He/Rice University
These schematic diagrams depict the fabrication process for p-n junction photodectors using flattened, highly aligned nanotube carpets.

CREDIT: X. He/Rice University

Abstract:
Using carpets of aligned carbon nanotubes, researchers from Rice University and Sandia National Laboratories have created a solid-state electronic device that is hardwired to detect polarized light across a broad swath of the visible and infrared spectrum.

Broadband photodetector for polarized light: Rice, Sandia team uses carbon nanotubes for polarized-light detection

Houston, TX | Posted on July 16th, 2013

The research is available online from the American Chemical Society's journal ACS Nano.

"Detecting polarized light is extremely useful," said Rice's Junichiro Kono, professor of electrical and computer engineering and of physics and astronomy. "Many animals and insects can see polarized light and use it for navigation, communication and more. Humans can't see polarized light, so we rely on devices to do that for us."

Most devices can't detect polarized light directly. Instead, engineers place a grate or filter in front of the detector.

"Our photodetector discerns polarized light intrinsically, much like the photoreceptors in the eyes of animals and insects that see polarized light," said François Léonard at Sandia National Laboratories, one of the lead researchers on the study.

Polarized light consists of individual electromagnetic waves oscillating parallel to one another. The effect is created when light reflects from a transparent material, which is why polarized sunglasses reduce the glare from water, glass and other surfaces. Astronomers use polarized light in a number of ways, and there are a number of applications for polarimetry in communications and the military.

Rice's new photodetector is the latest development from a collaboration between Rice and Sandia under Sandia's National Institute for Nano Engineering program, which is funded by the Department of Energy. In February, Kono, Léonard and colleagues described a new method for making photodetectors from carpets of carbon nanotubes -- long, narrow tubes of pure carbon that are about as wide as a strand of DNA.

The nanotube carpets used in the photodetectors are grown in the lab of Rice chemist Robert Hauge, who pioneered a process for growing densely packed nanotubes on flat surfaces. Xiaowei He, a graduate student in Kono's group, found a way to use Teflon film to flatten these tightly packed nanotubes so that they are aligned in the same direction. Each carpet contains dozens of varieties of nanotubes, and about two-thirds of the varieties are semiconductors. Because each of the semiconducting varieties interacts with a specific wavelength of light, Kono's team was able to show in its earlier work that the flattened, aligned carpets of nanotubes could serve as broad-spectrum photodetectors.

In the ACS Nano study, lead author He used chemicals called "dopants" to alter the electrical properties of the nanotube carpets. He created two types of carpet, one with positively charged carriers (p-type) and another with negatively charged carriers (n-type). By overlapping sections of these two, He and colleagues created a device called a p-n junction, which is a fundamental building block of microelectronics.

"Our work provides a new path for the realization of polarization-sensitive photodetectors that could be enabled on flexible or nonplanar surfaces," He said.

Study co-authors include Hauge, Xuan Wang, Kankan Cong and Qijia Jiang, all of Rice; Léonard, Alexander Kane and John Goldsmith, all of Sandia; and Sébastien Nanot, formerly of Rice and now with the Institute of Photonic Sciences in Barcelona, Spain.

The research was supported by the Lockheed Martin Advanced Nanotechnology Center of Excellence at Rice University, the National Science Foundation, the Department of Energy, the Welch Foundation, and the National Institute for Nano Engineering and the Laboratory Directed Research and Development Program, both of Sandia.

####

About Rice University
Located on a 300-acre forested campus in Houston, Rice University is consistently ranked among the nation's top 20 universities by U.S. News & World Report. Rice has highly respected schools of Architecture, Business, Continuing Studies, Engineering, Humanities, Music, Natural Sciences and Social Sciences and is home to the Baker Institute for Public Policy. With 3,708 undergraduates and 2,374 graduate students, Rice's undergraduate student-to-faculty ratio is 6-to-1. Its residential college system builds close-knit communities and lifelong friendships, just one reason why Rice has been ranked No. 1 for best quality of life multiple times by the Princeton Review and No. 2 for "best value" among private universities by Kiplinger's Personal Finance. To read "What they're saying about Rice," go to tinyurl.com/AboutRiceU.

For more information, please click here

Contacts:
David Ruth
713-348-6327


Jade Boyd
713-348-6778

Copyright © Rice University

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related Links

A copy of the ACS Nano paper is available at:

Related News Press

News and information

GS7 Graphene Sensor maybe Solution in Fight Against Cancer January 25th, 2015

Toyocolor to Launch New Carbon Nanotube Materials at nano tech 2015 January 24th, 2015

NANOPOSTER 2015 - 5th Virtual Nanotechnology Conference - call for abstracts January 24th, 2015

Nanosensor Used for Simultaneous Determination of Effective Tea Components January 24th, 2015

Laboratories

Self-assembled nanotextures create antireflective surface on silicon solar cells: Nanostructured surface textures-with shapes inspired by the structure of moths' eyes-prevent the reflection of light off silicon, improving conversion of sunlight to electricity January 21st, 2015

NREL Scientist Brian Gregg Named AAAS Fellow: Gregg honored for distinguished contributions to the field of organic solar photoconversion January 20th, 2015

Self-destructive Effects of Magnetically-doped Ferromagnetic Topological Insulators: Magnetic atoms that create exotic surface property also sow the seeds of its destruction January 19th, 2015

Solving an organic semiconductor mystery: Berkeley Lab researchers uncover hidden structures in domain interfaces that hamper performance January 16th, 2015

Govt.-Legislation/Regulation/Funding/Policy

The latest fashion: Graphene edges can be tailor-made: Rice University theory shows it should be possible to tune material's properties January 24th, 2015

Scientists 'bend' elastic waves with new metamaterials that could have commercial applications: Materials could benefit imaging and military enhancements such as elastic cloaking January 23rd, 2015

Harper Government Supports Research Innovation in Western Canada January 22nd, 2015

EnvisioNano: An image contest hosted by the National Nanotechnology Initiative (NNI) January 22nd, 2015

Nanotubes/Buckyballs

GS7 Graphene Sensor maybe Solution in Fight Against Cancer January 25th, 2015

Toyocolor to Launch New Carbon Nanotube Materials at nano tech 2015 January 24th, 2015

Carbon nanotube finding could lead to flexible electronics with longer battery life January 14th, 2015

Carbon Nanotubes Increase Efficiency of Solar Cells January 12th, 2015

Sensors

GS7 Graphene Sensor maybe Solution in Fight Against Cancer January 25th, 2015

Nanosensor Used for Simultaneous Determination of Effective Tea Components January 24th, 2015

Iranian Scientists Produce Graphene-Based Oxygen Sensor January 23rd, 2015

Graphene brings quantum effects to electronic circuits January 22nd, 2015

Discoveries

GS7 Graphene Sensor maybe Solution in Fight Against Cancer January 25th, 2015

Nanosensor Used for Simultaneous Determination of Effective Tea Components January 24th, 2015

The latest fashion: Graphene edges can be tailor-made: Rice University theory shows it should be possible to tune material's properties January 24th, 2015

Silver nanowires demonstrate unexpected self-healing mechanism: The material has potential for flexible electronics January 23rd, 2015

Announcements

GS7 Graphene Sensor maybe Solution in Fight Against Cancer January 25th, 2015

Toyocolor to Launch New Carbon Nanotube Materials at nano tech 2015 January 24th, 2015

NANOPOSTER 2015 - 5th Virtual Nanotechnology Conference - call for abstracts January 24th, 2015

Nanosensor Used for Simultaneous Determination of Effective Tea Components January 24th, 2015

Interviews/Book Reviews/Essays/Reports/Podcasts/Journals/White papers

Nanosensor Used for Simultaneous Determination of Effective Tea Components January 24th, 2015

New technique helps probe performance of organic solar cell materials January 23rd, 2015

Iranian Scientists Produce Graphene-Based Oxygen Sensor January 23rd, 2015

Silver nanowires demonstrate unexpected self-healing mechanism: The material has potential for flexible electronics January 23rd, 2015

Military

The latest fashion: Graphene edges can be tailor-made: Rice University theory shows it should be possible to tune material's properties January 24th, 2015

Scientists 'bend' elastic waves with new metamaterials that could have commercial applications: Materials could benefit imaging and military enhancements such as elastic cloaking January 23rd, 2015

Laser-generated surface structures create extremely water-repellent metals: Super-hydrophobic properties could lead to applications in solar panels, sanitation and as rust-free metals January 20th, 2015

Solving an organic semiconductor mystery: Berkeley Lab researchers uncover hidden structures in domain interfaces that hamper performance January 16th, 2015

Research partnerships

Wearable sensor clears path to long-term EKG, EMG monitoring January 20th, 2015

Graphene enables all-electrical control of energy flow from light emitters: First signatures of graphene plasmons at telecommunications wavelength revealed January 20th, 2015

Charge instability detected across all types of copper-based superconductors: Findings may help researchers synthesize materials that can superconduct at room temperature January 16th, 2015

Gold nanoparticles show promise for early detection of heart attacks: NYU School of Engineering Professors collaborate with researchers from Peking University on a new test strip January 15th, 2015

NanoNews-Digest
The latest news from around the world, FREE



  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More










ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project







© Copyright 1999-2015 7th Wave, Inc. All Rights Reserved PRIVACY POLICY :: CONTACT US :: STATS :: SITE MAP :: ADVERTISE