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Surface Acoustic Wave-Induced Electroluminescence Intensity Oscillation in Planar Light-Emitting Devices

Published online by Cambridge University Press:  01 February 2011

Marco Cecchini ,
Vincenzo Piazza ,
Fabio Beltram ,
Martin Ward ,
Andrew Shields ,
Harvey Beere  and
David Ritchie
Marco Cecchini
Affiliation:
Scuola Normale Superiore and NEST-INFM, I-56126 Pisa, Italy.
Vincenzo Piazza
Affiliation:
Scuola Normale Superiore and NEST-INFM, I-56126 Pisa, Italy.
Fabio Beltram
Affiliation:
Scuola Normale Superiore and NEST-INFM, I-56126 Pisa, Italy.
Martin Ward
Affiliation:
Toshiba Research Europe Limited, Cambridge Research Laboratory, 260 Cambridge Science Park, Milton Road, Cambridge CB4 OWE, United Kingdom.
Andrew Shields
Affiliation:
Toshiba Research Europe Limited, Cambridge Research Laboratory, 260 Cambridge Science Park, Milton Road, Cambridge CB4 OWE, United Kingdom.
Harvey Beere
Affiliation:
Cavendish Laboratory, University of Cambridge, Cambridge CB3 0HE, United Kingdom.
David Ritchie
Affiliation:
Cavendish Laboratory, University of Cambridge, Cambridge CB3 0HE, United Kingdom.
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Abstract

Electroluminescence (EL) emission controlled by means of surface acoustic waves (SAWs) in planar light-emitting diodes (pLEDs) is demonstrated. Interdigital transducers (IDTs) for SAW generation were integrated onto pLEDs fabricated following a scheme compatible with SAW propagation [1]. EL in presence of SAW was studied by time-correlated photon-counting techniques. We found intensity oscillation at the SAW frequency (˜1 GHz) demonstrating electron injection into the p-type region synchronous with the SAW wavefronts.

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References

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