Fig. 3 Wall-plug efficiency comparison between single emitter
against 3-unit ICL array.
active region and low heat interference between each emitter in our
array structure design.
Conclusion: We have demonstrated watt-level ICL arrays operating
at 10℃ in CW operation. The CW output power from a single 16 µm-wide and
3-mm-long ridge emitter reached 320 mW at 20℃. For an array sample
containing three emitters, the maximum WPE of 14.4% was achieved at
10℃, which is close to the value of 15% measured from a single emitter
sample, indicating that the array structure design effectively
suppressed thermal interference between the emitters.
Acknowledgments: This work was supported by the National Key
Research and Development Program of China (2018YFB2200500), the National
Natural Science Foundation of China (61790583, 61991431, 62174158), the
Youth Innovation Promotion Association of the Chinese Academy of
Sciences (2021107), and Key Program of the Chinese Academy of Sciences
(XDB43000000). The authors would like to thank Ping Liang for her help
in device processing.
2021 The Authors. Electronics Letters published by John Wiley
& Sons Ltd on behalf of The Institution of Engineering and Technology
This is an open access article under the terms of the Creative Commons
Attribution License, which permits use, distribution and reproduction in
any medium, provided the original work is properly cited.
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