Optimized surface-emitting photonic-crystal terahertz quantum cascade lasers with reduced resonator dimensions
- 27 September 2010
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 97 (13)
- https://doi.org/10.1063/1.3489941
Abstract
Terahertz frequency photonic-crystal quantum cascade lasers allow directional and controllable surface emission while at the same time functioning efficiently well above liquid nitrogen temperature. Through an in-depth understanding of the mechanism underlying surface emission, we demonstrate optimized devices with significantly reduced absolute threshold currents. We are able to reduce the device surface area by more than a factor of two, while maintaining angularly narrow, single-lobed surface emission with a divergence of approximate to 10 degrees X 10 degrees. The devices emit at similar to 2.8-2.9 THz, with maximum operating temperatures in the range 80-150 K. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3489941]Keywords
This publication has 15 references indexed in Scilit:
- 3D harnessing of light with 2.5D photonic crystalsLaser & Photonics Reviews, 2010
- Graded photonic crystal terahertz quantum cascade lasersApplied Physics Letters, 2010
- Predictable surface emission patterns in terahertz photonic-crystal quantum cascade lasersOptics Express, 2009
- 186 K operation of terahertz quantum-cascade lasers based on a diagonal designApplied Physics Letters, 2009
- Electrically pumped photonic-crystal terahertz lasers controlled by boundary conditionsNature, 2009
- Effect of transverse mode structure on the far field pattern of metal-metal terahertz quantum cascade lasersJournal of Applied Physics, 2008
- Phase-shift effect on a two-dimensional surface-emitting photonic-crystal laserApplied Physics Letters, 2005
- Experimental demonstration of a high quality factor photonic crystal microcavityApplied Physics Letters, 2003
- Analysis of surface-emitting second-order distributed feedback lasers with central grating phaseshiftIEEE Journal of Selected Topics in Quantum Electronics, 2003
- Terahertz semiconductor-heterostructure laserNature, 2002