Surface Emitting Distributed Feedback Quantum Cascade Laser around 8.3 mu m

We demonstrate surface emitting distributed feedback quantum cascade lasers emitting at wavelengths from 8.1 mu m at 90 K to 8.4 mu m 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 degrees is obtained in the direction along the waveguide.

Submitted by 阎军 (yanj@red.semi.ac.cn) on 2010-12-05T03:55:09Z No. of bitstreams: 1 Surface Emitting Distributed Feedback Quantum Cascade Laser around 8.3 mu m.pdf: 779251 bytes, checksum: ac1d84233de163530a092fd5a8adf69a (MD5)

Approved for entry into archive by 阎军(yanj@red.semi.ac.cn) on 2010-12-05T03:59:38Z (GMT) No. of bitstreams: 1 Surface Emitting Distributed Feedback Quantum Cascade Laser around 8.3 mu m.pdf: 779251 bytes, checksum: ac1d84233de163530a092fd5a8adf69a (MD5)

Made available in DSpace on 2010-12-05T03:59:38Z (GMT). No. of bitstreams: 1 Surface Emitting Distributed Feedback Quantum Cascade Laser around 8.3 mu m.pdf: 779251 bytes, checksum: ac1d84233de163530a092fd5a8adf69a (MD5) Previous issue date: 2010

Supported by the National Science Fund for Distinguished Young Scholars of China under Grant No 60525406, the National Natural Science Foundation of China under Grant Nos 60736031, 60806018 and 60906026, the National Basic Research Program of China under Grant No 2006CB604903, and the National High Technology Research and Development Program of China under Grant Nos 2007AA03Z446 and 2009AA03Z403.

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Supported by the National Science Fund for Distinguished Young Scholars of China under Grant No 60525406, the National Natural Science Foundation of China under Grant Nos 60736031, 60806018 and 60906026, the National Basic Research Program of China under Grant No 2006CB604903, and the National High Technology Research and Development Program of China under Grant Nos 2007AA03Z446 and 2009AA03Z403.