| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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Surface Emitting Distributed Feedback Quantum Cascade Laser around 8.3 μm |
| GUO Wan-Hong, LIU Jun-Qi**, LU Quan-Yong, ZHANG Wei, JIANG Yu-Chao, LI Lu, WANG Li-Jun, LIU Feng-Qi, WANG Zhan-Guo
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Key Lab of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences, P.O. Box 912, Beijing 100083
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| Cite this article: |
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GUO Wan-Hong, LIU Jun-Qi, LU Quan-Yong et al 2010 Chin. Phys. Lett. 27 114214 |
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Abstract We demonstrate surface emitting distributed feedback quantum cascade lasers emitting at wavelengths from 8.1 μm at 90 K to 8.4 μm at 210 K. The second−order metalized grating is carefully designed using a modified coupled-mode theory and fabricated by contact lithography. The devices show single mode behavior with a side mode suppression ratio above 18 dB at all working temperatures. At 90 K, the device emits an optical power of 101 mW from the surface and 199 mW from the edge. In addition, a double-lobe far-field pattern with a separation of 2.2° is obtained in the direction along the waveguide.
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| Keywords:
42.55.Px
42.79.Dj
85.60.Bt
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Received: 26 May 2010
Published: 22 October 2010
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| PACS: |
42.55.Px
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(Semiconductor lasers; laser diodes)
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42.79.Dj
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(Gratings)
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85.60.Bt
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(Optoelectronic device characterization, design, and modeling)
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