| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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Terahertz Quantum Cascade Laser Operating at 2.94THz |
| LIU Jun-Qi, CHEN Jian-Yan, LIU Feng-Qi, LI Lu, WANG Li-Jun, WANG Zhan-Guo
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| Key Laboratory of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences, PO Box 912, Beijing 100083 |
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| Cite this article: |
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LIU Jun-Qi, CHEN Jian-Yan, LIU Feng-Qi et al 2010 Chin. Phys. Lett. 27 104205 |
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Abstract The development of quantum cascade laser at 2.94 THz is reported. The laser structure is based on a bound-to-continuum active region and a semi-insulating surface-plasmon waveguide. Lasing is observed up to a heat-sink temperature of 70 K in pulsed mode with light power of 4.75 mW at 10 K and 1 mW at 70 K. A threshold current density of 296.5 A/cm2 and an internal quantum efficiency of 1.57×10−2 per cascade period are also observed at 10 K. The characteristic temperature of this laser is extracted to be T0= 57.5 K.
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| Keywords:
42.55.Px
81.15.Hi
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Received: 01 April 2010
Published: 26 September 2010
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| PACS: |
42.55.Px
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(Semiconductor lasers; laser diodes)
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81.15.Hi
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(Molecular, atomic, ion, and chemical beam epitaxy)
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