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Wide-ridge metal-metal terahertz quantum cascade lasers with high-order lateral mode suppression
Terahertz quantum cascade lasers with wide-ridge metal-metal waveguides are prone to lasing in high-order lateral modes, which reduce the maximum light output power from these devices. We have demonstrated, theoretically and experimentally, that the output power can be improved severalfold by introd...
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Published in: | Applied physics letters 2008-01, Vol.92 (3), p.031106-031106-3 |
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Main Authors: | , , , , , , |
Format: | Article |
Language: | English |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | Terahertz quantum cascade lasers with wide-ridge metal-metal waveguides are prone to lasing in high-order lateral modes, which reduce the maximum light output power from these devices. We have demonstrated, theoretically and experimentally, that the output power can be improved severalfold by introducing "side absorbers" into the waveguide structure, which enforce lasing in the
TM
00
mode with minor temperature performance deterioration. Lasers without side absorbers operate up to
168
K
, a current record for devices processed using indium/gold wafer bonding. |
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ISSN: | 0003-6951 1077-3118 |
DOI: | 10.1063/1.2835202 |