Enhanced responsivity of photo-induced-EMF adaptive photodetectors using asymmetric interdigitated contacts: scaling limits and application to laser ultrasound sensing

Author

Pepper, D.M. ; Dunning, G.J. ; Coy, J.A. ; Nolte, D.D. ; Pouet, B. ; Bacher, G.D. ; Klein, M.B.

Author_Institution

HRL Labs., Malibu, CA, USA

fYear

2000

fDate

6-10 Aug. 2000

Firstpage

65

Lastpage

67

Abstract

We demonstrate enhanced responsivity in GaAs photo-EMF adaptive photodetectors using a novel asymmetric interdigitated electrode configuration with fine spacing. We observe enhancements even when only a fraction of an optical fringe is collected between the contacts.

Keywords

III-V semiconductors; adaptive optics; electric potential; gallium arsenide; optical sensors; photoacoustic effect; photodetectors; ultrasonic applications; ultrasonic devices; GaAs; GaAs photo-EMF adaptive photodetectors; asymmetric interdigitated contacts; asymmetric interdigitated electrode configuration; contacts; enhanced responsivity; fraction; laser ultrasound sensing; optical fringe; photo-EMF adaptive photodetectors; photo-induced-EMF adaptive photodetector; responsivity; scaling limits; Adaptive optics; Electrodes; Gallium arsenide; Optical distortion; Optical receivers; Optical sensors; Optical surface waves; Photoconductivity; Photodetectors; Ultrasonic imaging;

fLanguage

English

Publisher

ieee

Conference_Titel

Nonlinear Optics: Materials, Fundamentals, and Applications, 2000. Technical Digest

Conference_Location

Kaua´i-Lihue, HI, USA

Print_ISBN

1-55752-646-X

Type

conf

DOI

10.1109/NLO.2000.883576

Filename

883576