Title :
Coherent control of acoustic phonons in semiconductor superlattices
Author :
Dekorsy, T. ; Bartels, A. ; Kurz, H. ; Kohler, Klaus
Author_Institution :
Inst. fur Halbleitertech. II, Rheinisch-Westfalisches Technische Hochschule, Aachen, Germany
Abstract :
Summary form only given.We report on experiments demonstrating the complete quenching of the first-order coherent amplitude by carefully adjusting the laser intensities with respect to the resonant excitation mechanism. The experiments are performed with 50-fs laser pulses derived from a Kerr-lens modelocked Ti:sapphire laser resonantly tuned to the first electron heavy-hole interband resonance of the superlattices. The coherently excited phonon modes are detected in time resolved reflectivity and transmission changes recorded with a fast-scanning delay generator.
Keywords :
high-speed optical techniques; laser mode locking; light coherence; optical Kerr effect; phonons; semiconductor superlattices; 50 fs; Kerr-lens modelocked Ti:sapphire laser; coherent acoustic phonon control; coherently excited phonon modes; complete quenching; fast-scanning delay generator; first electron heavy-hole interband resonance; first-order coherent amplitude; fs laser pulses; laser intensities; resonant excitation mechanism; resonantly tuned; semiconductor superlattices; superlattices; time resolved reflectivity; transmission changes; Acoustic pulses; Electrons; Laser excitation; Laser modes; Laser tuning; Optical pulses; Phonons; Resonance; Semiconductor lasers; Semiconductor superlattices;
Conference_Titel :
Quantum Electronics Conference, 1998. IQEC 98. Technical Digest. Summaries of papers presented at the International
Conference_Location :
San Francisco, CA, USA
Print_ISBN :
1-55752-541-2
DOI :
10.1109/IQEC.1998.680015
