Journal
APPLIED PHYSICS LETTERS
Volume 103, Issue 17, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4826943
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Funding
- Vienna Science and Technology Fund [WWTF MA09-030]
- Austrian Scientific Fund FWF [SFB-IRON F25, DK CoQuS W1210]
- Austrian Nano Initiative project (PLATON)
- Austrian Science Fund (FWF) [W1210] Funding Source: Austrian Science Fund (FWF)
- Austrian Science Fund (FWF) [F 2503] Funding Source: researchfish
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We increased the active region/waveguide thickness of terahertz quantum cascade lasers with semi-insulating surface plasmon waveguides by stacking two symmetric active regions on top of each other, via a direct wafer bonding technique. In this way, we enhance the generated optical power in the cavity and the mode confinement. We achieved 470 mW peak output power in pulsed mode from a single facet at a heat sink temperature of 5 K and a maximum operation temperature of 122 K. Furthermore, the devices show a broad band emission spectrum over a range of 420GHz, centered around 3.9 THz. (C) 2013 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution 3.0 Unported License.
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