Distributed-feedback terahertz quantum-cascade lasers with laterally corrugated metal waveguides
Optics Letters, Vol. 30, Issue 21, pp. 2909-2911 (2005)
http://dx.doi.org/10.1364/OL.30.002909
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Abstract
We report the demonstration of distributed-feedback terahertz quantum-cascade lasers based on a first-order grating fabricated via a lateral corrugation in a double-sided metal ridge waveguide. The phase of the facet reflection was precisely set by lithographically defined facets by dry etching. Single-mode emission was observed at low to moderate injection currents, although multimode emission was observed far beyond threshold owing to spatial hole burning. Finite-element simulations were used to calculate the modal and threshold characteristics for these devices, with results in good agreement with experiments.
© 2005 Optical Society of America
OCIS Codes
(140.3070) Lasers and laser optics : Infrared and far-infrared lasers
(140.3490) Lasers and laser optics : Lasers, distributed-feedback
(140.5960) Lasers and laser optics : Semiconductor lasers
(230.5590) Optical devices : Quantum-well, -wire and -dot devices
ToC Category:
Lasers and Laser Optics
Citation
Benjamin S. Williams, Sushil Kumar, Qing Hu, and John L. Reno, "Distributed-feedback terahertz quantum-cascade lasers with laterally corrugated metal waveguides," Opt. Lett. 30, 2909-2911 (2005)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-30-21-2909
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