Innovative Infrared Photodetector Exploits Surface of Nanorods
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.
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.
The Institute of Nanotechnology puts significant effort into ensuring that the information provided on its news pages is accurate and up-to-date. However, we cannot guarantee absolute accuracy. Consequently, the Institute of Nanotechnology disclaims any and all responsibility for inaccuracy, omission or any kind of deficiency in relation to the news items and articles hosted herein.
- 29 July 2014Nanotechnology and tyres: Greening industry and transport
- 22 July 2014Supporting Recommendations for Future Topics in Horizon 2020
- 17 June 20142014 edition of European NanoSafety Cluster Compendium now online
- 14 May 2014Gold nanoparticles for cancer treatment
- 22 April 2014Irish Materials Research Centre (AMBER) in World First Graphene Innovation
- View All