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Proceedings Paper

Surface-acoustic-wave-controlled photodetectors
Author(s): Fernando Calle; T. Palacios; J. Pedros; J. Grajal
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Paper Abstract

Nitride semiconductor devices have recently been developed for a number of electronic and optoelectronic applications, including amplifiers, light emitters and several kinds of sensors. In particular, ultraviolet detectors with a tailored spectral response can be achieved due to the direct wide bandgap of AlGaN alloys; on the other side, acoustic wave devices take advantage of the piezoelectric and elastic properties. In this work, we will describe the fabrication and characterization of a novel kind of optical detector, based on the interaction of surface acoustic waves and photocarriers. The response, which is linear with the incident optical power, can be controlled either by modifying the input power of the RF signal which creates the acoustic wave, or by tuning its frequency, in the latter case with a very high sensitivity. Several applications can be envisaged as a result of this synergy, such as imaging displays and electro-optical modulators.

Paper Details

Date Published: 9 June 2004
PDF: 4 pages
Proc. SPIE 5502, Second European Workshop on Optical Fibre Sensors, (9 June 2004); doi: 10.1117/12.566698
Show Author Affiliations
Fernando Calle, Univ. Politecnica de Madrid (Spain)
T. Palacios, Univ. Politecnica de Madrid (Spain)
J. Pedros, Univ. Politecnica de Madrid (Spain)
J. Grajal, Univ. Politecnica de Madrid (Spain)

Published in SPIE Proceedings Vol. 5502:
Second European Workshop on Optical Fibre Sensors
Jose Miguel Lopez-Higuera; Brian Culshaw, Editor(s)

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