Front contact electroreflectance: An alternative technique for semiconductor optical studies

Autor:	Adriana Giordana, Robert Glosser
Rok vydání:	1991
Předmět:	Materials science Silicon business.industry Doping chemistry.chemical_element Optics Semiconductor chemistry Modulation Electric field Sapphire Optoelectronics Thin film business Instrumentation Ohmic contact
Zdroj:	Review of Scientific Instruments. 62:1027-1030
ISSN:	1089-7623 0034-6748
DOI:	10.1063/1.1142053
Popis:	An alternative form of application of an electric field to semiconductors so as to provide electroreflectance modulation is presented. Two metallic contacts, a large ring‐shaped one enclosing a small transparent one, are deposited on the specimen surface and connected to the two leads of a signal generator. Results from a highly doped n‐type silicon bulk and from an undoped 4000 nm silicon film on sapphire demonstrate that this technique yields spectra equivalent to traditionally performed electroreflectance or photoreflectance. We also show that electroreflectance response can be obtained with a current generator connected across a single metal contact.
Databáze:	OpenAIRE
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