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Microring quantum cascade surface emitting lasers
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DOI：10.1063/5.0245311.png)
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We miniaturize a vertically coupled in-plane whispering gallery mode cavity incorporating a quantum cascade gain medium, aiming to realize the mid-infrared counterpart to the vertical cavity surface emitting laser. Building on previous work with linear microcavities, we introduce a new type of quantum cascade surface emitting laser (QCSEL) by miniaturizing a buried heterostructure ring cavity. At wavelengths of 4.5 and 8 mu m, we investigate the optical losses for decreasing ring diameters while benchmarking the device performance against linear microcavities. We achieve an equivalent mirror reflectivity of 0.95 and demonstrate lasing with ring diameters as small as 50 mu m. Finally, we report a continuous-wave threshold power dissipation of 274 mW for a 100 mu m diameter ring QCSEL, characterized on wafer level at 20 degrees C.
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IF:
5.3
论文数:
1.5K
被引数:
5.5K
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APL PHOTONICSOAAI
APL PHOTONICSIF5.3
OAAI分享收藏High power, low divergent, substrate emitting quantum cascade ring laser in continuous wave operationAPL MATERIALS
OAAI
APL MATERIALSIF4.5
OAAI分享收藏The influence of whispering gallery modes on the far field of ring lasersSCIENTIFIC REPORTSOAAI
SCIENTIFIC REPORTSIF3.9
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