Variable frequency photoconductive grating method

Autor:	J. P. Nicholson
Rok vydání:	2000
Předmět:	Materials science Physics and Astronomy (miscellaneous) Ambipolar diffusion business.industry Photoconductivity Physics::Optics Carrier lifetime Grating Pockels effect law.invention Optics Semiconductor law Optoelectronics business Diffraction grating Beam splitter
Zdroj:	Applied Physics Letters. 77:2563-2565
ISSN:	1077-3118 0003-6951
DOI:	10.1063/1.1318936
Popis:	The theoretical treatment of the steady-state photocarrier grating method is extended to include the frequency dependence of the chopping frequency, ω. It is shown that measurements of the characteristic parameter, β, as a function of ω yield both the ambipolar diffusion length, L, as well as the carrier lifetime, τ, for a fixed angular setting. An alternative experimental setup using a Pockel cell and polarizing cube as beam splitter is suggested to facilitate measurements at higher frequencies.
Databáze:	OpenAIRE
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