Picosecond Time Resolved X-ray Diffraction Measurements of Coherent Phonons and Carrier Dynamics at a Buried Interface

Autor:	E. Landhal, Rachel Goldman, Sungkwon Lee, David A. Reis, David Fritz, Donald A. Walko, Yu-Miin Sheu
Rok vydání:	2007
Předmět:	Diffraction Materials science business.industry Phonon Relaxation (NMR) Physics::Optics Substrate (electronics) Laser Molecular physics Gallium arsenide law.invention Condensed Matter::Materials Science chemistry.chemical_compound chemistry law Picosecond Femtosecond Optoelectronics business
Zdroj:	2007 Conference on Lasers and Electro-Optics - Pacific Rim.
DOI:	10.1109/cleopr.2007.4391239
Popis:	We present time resolved X-ray diffraction (TRXD) experiments on the transport of a coherent acoustic wave-packet and nonlinear carrier relaxation processes across the nearly ideal AlGaAs/GaAs interface. A femtosecond laser impulsively excites the underlying substrate such that the coherent acoustic phonons take the form of two counter propagating unipolar strain pulses and associated hot carrier dynamics. Picosecond TRXD is used to observe the laser-induced strain separately for the film and substrate.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::a33b20882f617363f8f08e7541c8a5b2 https://doi.org/10.1109/cleopr.2007.4391239 Zobrazit plný text záznamu