dc.citation.conferencePlace |
FR |
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dc.citation.startPage |
10682 |
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dc.citation.title |
SPIE Photonic Europe 2018 |
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dc.contributor.author |
Chung, Il-Sug |
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dc.contributor.author |
Taghizadeh, Alireza |
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dc.date.accessioned |
2023-12-19T15:52:34Z |
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dc.date.available |
2023-12-19T15:52:34Z |
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dc.date.created |
2018-02-26 |
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dc.date.issued |
2018-04-26 |
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dc.description.abstract |
Bound states in the continuum (BICs) in photonic crystal slabs represent the resonances with an infinite quality(Q)-factor, occurring above the light line for an infinitely periodic structure. We show that a set of BICs can turn into quasi-BICs with a very high Q-factor even for two or three unit cell structures. They are explained by a viewpoint of BICs originating from the tight-binding of individual resonances of each unit cell as in semiconductors. Combined with a reciprocal-space matching technique, the microcavities based on quasi-BICs can achieve a Q-factor as high as defect-based PhC microcavities. Few experimental studies have been done for BIC lasers. In this work, based on our finding on quasi-BICs, we have designed silicon-on-chip micro-cavity lasers, which integrates a BIC structure onto a combination of a 1-micron-thick oxide layer and a silicon substrate. Then, laser samples were fabricated by using a low-temperature wafer bonding technique and characterized with optical pumping method. The laser sample exhibits a clear evidence of lasing and a strong single mode operation. We note that the lasing action has a good tolerance over fabrication error, which is an experimental evidence of the theoretically anticipated conservation of topological charges. Detailed discussion on the laser characteristics will be presented in the talk. |
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dc.identifier.bibliographicCitation |
SPIE Photonic Europe 2018, pp.10682 |
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dc.identifier.uri |
https://scholarworks.unist.ac.kr/handle/201301/38002 |
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dc.language |
영어 |
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dc.publisher |
SPIE |
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dc.title |
[Invited paper] Hybrid silicon-on-chip lasers based on quasi-bound states in the continuum |
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dc.type |
Conference Paper |
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dc.date.conferenceDate |
2018-04-22 |
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