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Optically pumped lasing in a rolled-up dot-in-a-well (DWELL) microtube via the support of Au pad

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Abstract

We report the observation of optically pumped continuous wave lasing in a self-rolled-up InGaAs/GaAs quantum dot microtube at room temperature. Single layer of InAs quantum dots (~ 2.6 ML coverage) in a GaAs well sandwiched by two AlGaAs barriers are incorporated into the tube wall as the gain media. As-fabricated microtube is supported by a 300-nm-thick Au pad, aiming to separate the tube from GaAs substrate and thus to decrease the substrate loss, which finally enables lasing with ultralow threshold power (~ 4 µW) from an microtube ring resonator.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (Nos. 61474008 and 61674020), Program for New Century Excellent Talents in University of China (NCET-13-0686), International Science & Technology Cooperation Program of China (No. 2011DFR11010) and the 111 Project (No. B07005). Alexey E. Zhukov would like to thank the Russian Ministry of Education and Sciences (Grant 3.784.2016/3.5).

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Authors and Affiliations

  1. State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing, 100876, People’s Republic of China

    Zhaoer Chai, Qi Wang, Jiawei Cao, Guoming Mao, Hao Liu & Xiaomin Ren

  2. Ioffe Institute, 26 Polytekhnicheskaya, St. Petersburg, 194021, Russia

    Nikolai A. Maleev & Victor M. Ustinov

  3. Research and Engineering Center for Submicron Heterostructures for Microelectronics, 26 Polytekhnicheskaya, St. Petersburg, 194021, Russia

    Alexey P. Vasil’ev & Victor M. Ustinov

  4. St Petersburg Academic University, 8(3) Khlopina, St. Petersburg, 194021, Russia

    Alexey E. Zhukov

  5. ITMO University, 49 Kronverksky pr., St. Petersburg, 197101, Russia

    Victor M. Ustinov

Authors
  1. Zhaoer Chai
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  2. Qi Wang
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  3. Jiawei Cao
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  4. Guoming Mao
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  5. Hao Liu
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  6. Xiaomin Ren
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  7. Nikolai A. Maleev
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  8. Alexey P. Vasil’ev
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  9. Alexey E. Zhukov
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  10. Victor M. Ustinov
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Correspondence to Qi Wang.

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Chai, Z., Wang, Q., Cao, J. et al. Optically pumped lasing in a rolled-up dot-in-a-well (DWELL) microtube via the support of Au pad. Appl. Phys. B 124, 21 (2018). https://doi.org/10.1007/s00340-018-6895-z

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  • DOI: https://doi.org/10.1007/s00340-018-6895-z

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