TITLE

Silicon-on-insulator photoconductors for ultrasonic vibration detection with laser speckle

AUTHOR(S)
Bessette, Jonathan; Gogo, Ashifi; Garmire, Elsa
PUB. DATE
January 2009
SOURCE
Applied Physics Letters;1/26/2009, Vol. 94 Issue 4, pN.PAG
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Speckle-sized photoconductive silicon-on-insulator mesas have been designed to optically detect surface vibrations at frequencies extending into the megahertz range. When a single diode laser beam reflects off a vibrating surface as a moving speckle pattern, the photoconductive mesas can detect lateral speckle motion. The capability of noncontact, nondestructive testing via laser-induced ultrasonic vibrations was demonstrated using these photoconductive silicon mesas in a simple and rugged single-monitoring-beam configuration.
ACCESSION #
36434976

 

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