Title :
Femtosecond excitonic optoelectronics
Author :
Knox, Wayne H. ; Henry, Jill E. ; Goossen, Keith W. ; Li, Kathryn D. ; Tell, Benjamin ; Miller, David A B ; Chemla ; Gossard, Arthur C. ; English, J. ; Schmitt-Rink, S.
Author_Institution :
AT&T Bell Lab., Holmdel, NJ, USA
fDate :
12/1/1989 12:00:00 AM
Abstract :
The authors discuss a novel approach to femtosecond optoelectronics which uses the excitonic response to electric fields as a detector and the excitonic nonlinear response to optical fields as a generator. The sensitivity of the quantum-well exciton to applied electric fields is used to measure electrical transients with femtosecond time resolution. The authors examine several mechanisms for femtosecond electrical pulse generation, including exciton ionization and two-photon absorption, and present measurements of the propagation properties of coplanar striplines on ultrathin semiconductor substrates in the 1-100-THz frequency range. The generation and detection of an electrical pulse with a 180-fs risetime propagating on a coplanar stripline on GaAs/AlGaAs quantum wells are demonstrated
Keywords :
III-V semiconductors; aluminium compounds; electric field measurement; electroabsorption; excitons; gallium arsenide; high-speed optical techniques; semiconductor quantum wells; substrates; transients; two-photon processes; 1 to 100 THz; 180 fs; GaAs-AlGaAs; applied electric fields; coplanar striplines; electrical pulse risetime; electrical transients; electroabsorption; exciton ionization; excitonic nonlinear response; excitonic optoelectronics; excitonic response; excitonic response detectors; femtosecond electrical pulse generation; femtosecond optoelectronics; femtosecond time resolution; nonlinear excitonic response generator; optical fields; quantum wells; quantum-well exciton; two-photon absorption; ultrathin semiconductor substrates; Electric variables measurement; Excitons; Nonlinear optics; Optical pulse generation; Optical sensors; Pulse generation; Quantum wells; Stripline; Time measurement; Ultrafast optics;
Journal_Title :
Quantum Electronics, IEEE Journal of
