4.8 Article

Ultralow-Threshold Continuous-Wave Room-Temperature Crystal-Fiber/Nanoperovskite Hybrid Lasers for All-Optical Photonic Integration

期刊

ADVANCED MATERIALS
卷 33, 期 12, 页码 -

出版社

WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.202006819

关键词

fibers; hybrid lasers; lead halide perovskites; perovskite lasers; thermal management

资金

  1. Ministry of Science and Technology of Taiwan [MOST 109-2112-M-259-008, MOST 108-2112-M-259-001]

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This study demonstrates a successful method for achieving ultra-low-threshold continuous-wave room-temperature laser operation by using crystal fibers with robust and high-heat-load nature.
Continuous-wave (CW) room-temperature (RT) laser operation with low energy consumption is an ultimate goal for electrically driven lasers. A monolithically integrated perovskite laser in a chip-level fiber scheme is ideal. However, because of the well-recognized air and thermal instabilities of perovskites, laser action in a perovskite has mostly been limited to either pulsed or cryogenic-temperature operations. Most CW laser operations at RT have had poor durability. Here, crystal fibers that have robust and high-heat-load nature are shown to be the key to enabling the first demonstration of ultralow-threshold CW RT laser action in a compact, monolithic, and inexpensive crystal fiber/nanoperovskite hybrid architecture that is directly pumped with a 405 nm diode laser. Purcell-enhanced light-matter coupling between the atomically smooth fiber microcavity and the perovskite nanocrystallites gain medium enables a high Q (approximate to 1500) and a high beta (0.31). This 762 nm laser outperforms previously reported structures with a record-low threshold of 132 nW and an optical-to-optical slope conversion efficiency of 2.93%, and it delivers a stable output for CW and RT operation. These results represent a significant advancement toward monolithic all-optical integration.

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