Enhanced terahertz emission from impurity compensated GaSb

Autor:	Carl Shneider, Robinson Pino, Ingrid Wilke, Partha S. Dutta, Ricardo Ascazubi
Rok vydání:	2005
Předmět:	Materials science business.industry Terahertz radiation Doping chemistry.chemical_element Condensed Matter Physics Electronic Optical and Magnetic Materials Optics chemistry Impurity Excited state Femtosecond Dember effect Optoelectronics Light emission Tellurium business
Zdroj:	Physical Review B. 72
ISSN:	1550-235X 1098-0121
Popis:	We report femtosecond optically excited terahertz THz emission from tellurium doped GaSb at room temperature. The influence of the majority and minority carrier type and concentrations on the strength of the THz emission is investigated. Strong enhancement of THz emission in GaSb is observed as a result of compensation of native acceptors by tellurium donors. Surface field acceleration and the photo-Dember effect are identified as THz emission mechanisms in GaSb and modeled in dependence of the majority and minority carrier type and concentrations in our GaSb samples. THz emission from p-type GaSb is dominated by the photo-Dember effect whereas THz emission from n-type GaSb is dominated by surface field acceleration. The doping conditions under which THz emission is maximized are identified.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::199749827bcde083fbf84da789a44415 https://doi.org/10.1103/physrevb.72.045328 Zobrazit plný text záznamu