Tunable Coupled-Quantum-Well Laser Controlled by an Electric Field
IBM THOMAS J WATSON RESEARCH CENTER YORKTOWN HEIGHTS NY
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We propose a novel field-effect semiconductor laser whose wavelength can be tuned by an electric field parallel to the growth direction of two tightly coupled quantum wells in the active region. We have demonstrated the concept by optically pumping a laser heterostructure whose active region consisted of two 50 A GaAs wells separated by a 20 A Ga0.77Al0.23As potential barrier, in which, at 5 K, we have achieved tuning of the stimulated emission by more than 7 nm.... Semiconductor laser, Electric field effects in quantum wells, Quantum-Well laser, Tunable laser, Coupled quantum wells.
- Electrical and Electronic Equipment
- Lasers and Masers
- Electricity and Magnetism
- Quantum Theory and Relativity