Design of ultra-fast dual-wavelength resonant-cavity-enhanced Schottky photodetectors

Author

Bourdoucen, Hadj ; Jervase, Joseph A.

Author_Institution

Coll. of Eng., Sultan Qaboos Univ., Muscat, Oman

Volume

37

Issue

1

fYear

2001

fDate

1/1/2001 12:00:00 AM

Firstpage

63

Lastpage

68

Abstract

A systematic optimization procedure for the design of RCE Schottky photodetectors to achieve maximum quantum efficiency and high speed operation at 1.3 and 1.55 μm wavelengths is presented. The quantum efficiency formulation used includes the structural parameters of the photodetector and takes into account the wavelength dependence of the top and bottom mirrors reflectivities. The results have shown that the value of the thickness of the antireflection coating layer has a major influence in selecting the width of the photodetector to simultaneously achieve maximum quantum efficiency and high bandwidth at the two wavelengths. Simulated values of 270 and 40 GHz were obtained, respectively, for the 3-dB carrier-transit time-limited bandwidth and bandwidth-efficiency product for an RCE Schottky photodetector with a 0.02-μm gold layer

Keywords

Schottky diodes; antireflection coatings; cavity resonators; high-speed optical techniques; infrared detectors; mirrors; optical design techniques; optimisation; photodetectors; photodiodes; reflectivity; 0.02 mum; 1.3 to 1.55 mum; 270 GHz; 40 GHz; Ag; Schottky photodetectors; antireflection coating layer; bandwidth; bandwidth-efficiency product; bottom mirrors; carrier-transit time-limited bandwidth; design; high speed operation; maximum quantum efficiency; photodetector; quantum efficiency formulation; reflectivities; resonant-cavity-enhanced Schottky photodetectors; structural parameters; systematic optimization procedure; thickness; top mirrors; ultra-fast dual-wavelength resonant-cavity-enhanced Schottky photodetectors; wavelength dependence; Bandwidth; Coatings; Design optimization; Gold; Indium phosphide; Mirrors; Optical resonators; Photodetectors; Reflectivity; Resonance;

fLanguage

English

Journal_Title

Quantum Electronics, IEEE Journal of

Publisher

ieee

ISSN

0018-9197

Type

jour

DOI

10.1109/3.892725

Filename

892725