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Kim, Je-Hyung
Solid-State Quantum Architecture
Research Interests
  • Solid-state quantum emitters, Cavity quantum electrodynamics, Quantum entanglement between multiple qubits, On-chip integrated solid-state quantum devices

Room-temperature continuous-wave indirect-bandgap transition lasing in an ultra-thin WS2 disk

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dc.contributor.author Sung, Junghyun ko
dc.contributor.author Shin, Dongjin ko
dc.contributor.author Cho, HyunHee ko
dc.contributor.author Lee, Seong Won ko
dc.contributor.author Park, Seungmin ko
dc.contributor.author Kim, Young Duck ko
dc.contributor.author Moon, Jong Sung ko
dc.contributor.author Kim, Je-Hyung ko
dc.contributor.author Gong, Su-Hyun ko
dc.date.available 2022-11-17T06:18:00Z -
dc.date.created 2022-11-04 ko
dc.date.issued 2022-10 ko
dc.identifier.citation NATURE PHOTONICS, v.16, pp.792 - 797 ko
dc.identifier.issn 1749-4885 ko
dc.identifier.uri https://scholarworks.unist.ac.kr/handle/201301/60017 -
dc.description.abstract Indirect-bandgap transition lasing, even under continuous-wave excitation at room temperature, is demonstrated in an ultra-thin WS2 disk. Small semiconductor lasers that can be integrated on a chip are essential for a wide range of optical applications, including optical computing, communication and sensing. Practical laser applications have only been developed with direct-bandgap materials because of a general belief that lasing action from indirect-bandgap materials is almost impossible. Here we report unexpected indirect-bandgap transition lasing in an ultra-thin WS2 disk. We demonstrate that a 50-nm-thick WS2 disk offers efficient optical gain and whispering gallery modes that are sufficient for lasing action. As a result, the WS2 disk exhibits indirect transition lasing, even under continuous-wave excitation at room temperature. Our experimental results are in close agreement with theoretical modelling for phonon-assisted photon lasing. The results derived from external cavity-free ultra-thin WS2 layers offer a new direction for van-der-Waals-material-based nanophotonics and introduce the possibility for optical devices based on indirect-bandgap materials. ko
dc.language 영어 ko
dc.publisher NATURE PORTFOLIO ko
dc.title Room-temperature continuous-wave indirect-bandgap transition lasing in an ultra-thin WS2 disk ko
dc.type ARTICLE ko
dc.identifier.scopusid 2-s2.0-85139769100 ko
dc.identifier.wosid 000867521100003 ko
dc.type.rims ART ko
dc.identifier.doi 10.1038/s41566-022-01085-w ko
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