Title :
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
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;
Conference_Titel :
Nonlinear Optics: Materials, Fundamentals, and Applications, 2000. Technical Digest
Conference_Location :
Kaua´i-Lihue, HI, USA
Print_ISBN :
1-55752-646-X
DOI :
10.1109/NLO.2000.883576
