Title :
Quantum parallel laser: a unipolar superlattice interminiband laser
Author :
Friedman, L. ; Soref, R.A. ; Sun, G.
Author_Institution :
Rome Lab., RL/EROC, Hanscom AFB, MA, USA
fDate :
5/1/1997 12:00:00 AM
Abstract :
Designs are given for parallel (rather than cascade) intersubband lasing in superlattice structures of group IV and III-V materials. Structures with population inversion due to coupled wells have minibandwidths too narrow for coherent transport and the incoherent interperiod rates are too small for population of a significant number of periods. A single-well period with local population inversion gives operation in the coherent regime. An example is given for the III-V materials. Both SiGe-Si and Si-ZnS are discussed for intersubband lasing at 1-20 μm.
Keywords :
Ge-Si alloys; infrared sources; laser transitions; optical design techniques; population inversion; quantum well lasers; semiconductor superlattices; silicon; spectral line breadth; 1 to 20 mum; III-V materials; Si-ZnS; SiGe quantum well laser; SiGe-Si; coherent regime; coherent transport; group IV; incoherent interperiod rates; intersubband lasing; local population inversion; minibandwidths; population inversion; quantum parallel laser; single-well period; superlattice interminiband laser; superlattice structures; Breakdown voltage; Fiber lasers; Free electron lasers; Optical materials; Quantum cascade lasers; Quantum well lasers; Semiconductor lasers; Silicon; Sun; Superlattices;
Journal_Title :
Photonics Technology Letters, IEEE
