High speed and efficient selectively sensitive photodetectors

Author

Collin, St ; Pardo, F. ; Averin, S.V. ; Bardou, N. ; Pelouard, J.L.

Author_Institution

Lab. de Photonique et de Nanostruct., CNRS, Marcoussis, France

fYear

2010

fDate

6-10 Sept. 2010

Firstpage

209

Lastpage

211

Abstract

We report on the resonance cavity MSM-photodiode structures based on nanoscale metallic gratings which are used both as a tool for efficient light confinement and the photocarriers collection. The finger spacing of these detectors is less than the wavelength of incident light. Short collection path along with low diode capacitance (8 fF) allows theoretical cut-off frequencies as high as 500 GHz. Detector has record quantum efficiency of 46% and high selectivity (FWHM=17 nm) at wavelength 790 nm.

Keywords

Bragg gratings; metal-semiconductor-metal structures; optical elements; photodetectors; light confinement; nanoscale metallic gratings; photocarriers collection; resonance cavity MSM-photodiode structures; sensitive photodetectors; Detectors; Gallium arsenide; Gratings; Optical filters; Optical reflection; Optical sensors; Photodetectors; Bragg reflector; MSM-photodetector; high-speed response; metallic grating; quantum efficiency; reflection coefficient; resonance cavity;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrawideband and Ultrashort Impulse Signals (UWBUSIS), 2010 5th International Conference on

Conference_Location

Sevastopol

Print_ISBN

978-1-4244-7470-7

Electronic_ISBN

978-1-4244-7469-1

Type

conf

DOI

10.1109/UWBUSIS.2010.5609137

Filename

5609137