ISSN:
1077-3118
Source:
AIP Digital Archive
Topics:
Physics
Notes:
An asymmetric semiconductor electron wave Fabry–Perot interference filter has been designed with two above-barrier quasibound states for optical transitions. The upper state was designed to have a spatial confinement lifetime greater than three times that of the lower state (which was designed to be less than 100 fs). Such lifetime ratios and magnitudes, which are nearly impossible for below-barrier states, satisfy the criteria required for achieving population inversion. Furthermore, the transitions were designed to have large dipole matrix elements. Absorption measurements at multiple temperatures were used to demonstrate the first bound-to-quasibound transitions in an asymmetric structure. The experimental energies and dipole matrix elements are in agreement with calculated values. This type of structure could represent the basis for a new room-temperature infrared semiconductor laser.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.108651
