Abstract

We study the local states within the polariton band gap that arise due to deep defect centers with strong electron-phonon coupling. Electron transitions involving deep levels may result in alteration of local elastic constants. In this case, substantial reversible transformations of the impurity polariton density of states occur, which include the appearance/disappearance of the polariton impurity band, and its shift and/or the modification of its shape. These changes can be induced by thermo- and photoexcitation of the localized electron states or by trapping of injected charge carriers. We develop a simple model, which is applied to the Op center in GaP. Further possible experimental realizations of the effect are discussed.

Department(s)

Physics

Keywords and Phrases

Gallium; Crystal; Elasticity; Electromagnetic Field; Electron; Mathematical Model; Semiconductor; Thermodynamics; Vibration

International Standard Serial Number (ISSN)

0163-1829

Document Type

Article - Journal

Document Version

Final Version

File Type

text

Language(s)

English

Rights

© 2001 American Physical Society (APS), All rights reserved.

Publication Date

01 Sep 2001

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Physics Commons

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