Ultralow threshold on-chip microcavity nanocrystal quantum dot lasers

Bumki Min, Sungjee Kim, Koichi Okamoto, Lan Yang, Axel Scherer, Harry Atwater, Kerry Vahala

研究成果: Contribution to journalArticle査読

90 被引用数 (Scopus)

抄録

Chemically synthesized nanocrystal, CdSeZnS (core/shell), quantum dots are coated on the surface of an ultrahigh- Q toroidal microcavity and the lasing is observed at room and liquid nitrogen temperature by pulsed excitation of quantum dots, either through tapered fiber or free space. Use of a tapered fiber coupling substantially lowered the threshold energy when compared with the case of free space excitation. The reason for the threshold reduction is attributed to the efficient delivery of pump pulses to the active gain region of the toroidal microcavity. Further threshold reduction was possible by quantum dot surface-coverage control. By decreasing the quantum dot numbers on the surface of the cavity, the threshold energy is further decreased down to 9.9 fJ.

本文言語英語
論文番号191124
ジャーナルApplied Physics Letters
89
19
DOI
出版ステータス出版済み - 2006
外部発表はい

All Science Journal Classification (ASJC) codes

  • 物理学および天文学(その他)

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