Title :
Coherent nonlinear propagation of ultrafast electric field-transients through intersubband resonances
Author :
Eickemeyer, F. ; Woerner, M. ; Weiner, A.M. ; Elsaesser, T. ; Hey, R. ; Ploog, K.H.
Author_Institution :
Max-Born- Inst. for Nichtlineare Optik und Kurzzeitspektroskopie, Berlin, Germany
Abstract :
Summary form only given. Low-dimensioial semiconductors are promising candidates for implementing quantum computing and ultrafast coherent optical switching. So far, most research concentrates on interband or excitonic excitations whereas intersubband (IS) transitions in quantum wells (QWs) have been less explored. Recent developments like controlled shaping and time-resolved detection of electric field transients in the mid-infrared spectral range (/spl lambda/ = 5 to 20 /spl mu/m) allow to investigate and directly manipulate coherent IS excitations in the time domain. A key parameter in any optical switching process is the required switching power. We demonstrate for the first time coherent nonlinear control of IS excitations in GaAs/AlGaAs QWs by extremely weak electric field-transients of sub-picojoule energy.
Keywords :
III-V semiconductors; aluminium compounds; electro-optical switches; gallium arsenide; high-speed optical techniques; optical coherent transients; optical frequency conversion; optical phase matching; quantum computing; quantum well devices; semiconductor quantum wells; Bloch sphere; GaAs-AlGaAs; coherent nonlinear control; coherent nonlinear propagation; free induction decay; ideal homogeneously broadened two-level system; intersubband excitations; intersubband resonances; low-dimensional semiconductors; near-infrared pulses; partial Rabi flop; phase-locked mid-infrared pulses; phase-matched difference-frequency mixing; quantum wells; shaped mid-infrared pulses; time-dependent electric field; ultrafast electric field-transients; ultrafast free-space electro-optic sampling; ultrafast quantum computing; ultrafast switching; Electric variables measurement; Gallium arsenide; Liquid crystal displays; Nonlinear optics; Optical computing; Pulse measurements; Pulse shaping methods; Quantum computing; Resonance; Ultrafast optics;
Conference_Titel :
Lasers and Electro-Optics, 2001. CLEO '01. Technical Digest. Summaries of papers presented at the Conference on
Conference_Location :
Baltimore, MD, USA
Print_ISBN :
1-55752-662-1
DOI :
10.1109/CLEO.2001.947895