Home > Press > High efficiency infrared photodetectors using gold nanorods
 |
| Fig. 1 shows the structure and dimension of the gold nanorod Schottky diode photodetector, where 10 nm x 100 nm gold rods were used. Fig .2 shows the experimental set up and Fig. 3 the experimental results for light of 1500 nm, showing a significant increase in the photocurrent of the device with the gold nano rods.
|
Abstract:
Toyohashi Tech researchers develop an innovative infrared photodetector exploiting ‘plasmon resonance' at the surface of the Au nanorods, which enhances the density of photoelectrons excited over the Schottky barrier. This technology shows potential as the basis for the development of high efficiency infra-red photodetectors for optical communications systems.
High efficiency infrared photodetectors using gold nanorods
Japan | Posted on March 22nd, 2011
Devices used for the detection of light and other forms of electromagnetic energy include calorimeters, superconducting devices, and photodiodes used in optical communications systems.
Now, typical semiconductor devices include Schottky barrier photodetectors—where a PN junction is not necessary. However, for optical communications systems applications, it is necessary to improve the photo detection efficiency in the 1.3~1.5 micrometer range of wavelengths.
Here, Mitsuo Fukuda and colleagues used the localized surface plasmon (LSP) effects exhibited by gold nano-rods to improve the optical response of Schottky photodiodes. Notably, the desired resonance wavelength can be obtained by appropriate choice of the dimensions of gold nanorods. Thus combining Schottky barriers with gold nanorods holds promise as a means of producing high efficiency photodiodes.
####
For more information, please click here
Contacts:
Toyohashi University of Technology
1-1 Hibarigaoka, Tempaku
Toyohashi, Aichi Prefecture, 441-8580, JAPAN
Inquiries: International Affairs Division
E-mail:
TEL: +81-532-44-6577 or +81-532-44-6546
FAX: +81-532-44-6557
Copyright © Toyohashi Tech
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:
News and information
How do cold ions slide May 24th, 2013
Heinrich Rohrer dies at 79; a father of nanotechnology: With IBM colleague Gerd Binnig, Rohrer invented the scanning tunneling microscope, which can show individual atoms on a surface and move them around May 23rd, 2013
Gold nanocrystal vibration captured on billion-frames-per-second film May 23rd, 2013
Glowing Plant Releases Maker Kit, Enabling Anyone to Make a Glowing Plant at Home: Glowing Plant seeks funds via crowdfunding and raises almost $400,000 May 23rd, 2013
Discoveries
How do cold ions slide May 24th, 2013
Gold nanocrystal vibration captured on billion-frames-per-second film May 23rd, 2013
Whirlpools on the Nanoscale Could Multiply Magnetic Memory: At the Advanced Light Source, Berkeley Lab scientists join an international team to control spin orientation in magnetic nanodisks May 22nd, 2013
Bacterial spare parts filter antibiotic residue from groundwater May 22nd, 2013
Announcements
How do cold ions slide May 24th, 2013
Heinrich Rohrer dies at 79; a father of nanotechnology: With IBM colleague Gerd Binnig, Rohrer invented the scanning tunneling microscope, which can show individual atoms on a surface and move them around May 23rd, 2013
Gold nanocrystal vibration captured on billion-frames-per-second film May 23rd, 2013
Glowing Plant Releases Maker Kit, Enabling Anyone to Make a Glowing Plant at Home: Glowing Plant seeks funds via crowdfunding and raises almost $400,000 May 23rd, 2013
Photonics/Optics/Lasers
How do cold ions slide May 24th, 2013
Gold nanocrystal vibration captured on billion-frames-per-second film May 23rd, 2013
Rice unveils method for tailoring optical processors: Arranging nanoparticles in geometric patterns allows for control of light with light May 21st, 2013
Moth-Inspired Nanostructures Take the Color Out of Thin Films May 17th, 2013