Threshold improvement in uniformly lying helix cholesteric liquid crystal laser using auxiliary π-conjugated polymer active layer

Yoshida, Hiroyuki; Shiozaki, Yusuke; Inoue, Yo; Takahashi, Masaya; Ogawa, Yasuhiro; Fujii, Akihiko; Ozaki, Masanori

doi:https://doi.org/10.1063/1.4807402

Threshold improvement in uniformly lying helix cholesteric liquid crystal laser using auxiliary π-conjugated polymer active layer

Yoshida, Hiroyuki; Shiozaki, Yusuke; Inoue, Yo et al.

Journal of Applied Physics, 2013, 113(20), 203105-203105

Number of Access:676（2025-09-02 10:19 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/75672

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Title	Threshold improvement in uniformly lying helix cholesteric liquid crystal laser using auxiliary π-conjugated polymer active layer
Creator	NRID 1000080550045 1000080550045 researchmap permalink hiroyukiyoshida hiroyukiyoshida Scopus Author ID 55628543086 55628543086 CreatorName Yoshida, Hiroyuki
	CreatorName Shiozaki, Yusuke
	NRID 1000030723770 1000030723770 CreatorName Inoue, Yo
	CreatorName Takahashi, Masaya
	NRID 1000090152397 1000090152397 CreatorName Ogawa, Yasuhiro
	NRID 1000080304020 1000080304020 ORCID 0000-0003-3142-1193 0000-0003-3142-1193 researchmap permalink read0054804 read0054804 Scopus Author ID 35413649300 35413649300 CreatorName Fujii, Akihiko
	NRID 1000050204186 1000050204186 ORCID 0000-0002-9556-4225 0000-0002-9556-4225 researchmap permalink read0014092 read0014092 Scopus Author ID 55490143900 55490143900 CreatorName Ozaki, Masanori
Description	This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Hiroyuki Yoshida, Yusuke Shiozaki, Yo Inoue, Masaya Takahashi, Yasuhiro Ogawa, Akihiko Fujii, and Masanori Ozaki, Journal of Applied Physics 113, 203105 (2013) and may be found at https://doi.org/10.1063/1.4807402.
Abstract	We propose a device structure to lower the lasing threshold of a uniformly lying helix cholesteric liquid crystal (ChLC) laser. We place a p-conjugated polymer active layer beneath the ChLC layer to provide auxiliary gain, and demonstrate an improvement in the lasing threshold by a factor of 2.3. We also perform finite difference time domain calculations coupled with rate equations for a four-level system, and clarify the effect of the additional active layer on both the photonic density of states and the inversion population density. Although the addition of an extra layer lowers the photonic density of states, the gain provided by the auxiliary layer is sufficient to overcome the losses and decrease the lasing threshold. Our concept is useful for obtaining high-performance ChLC lasers.
Publisher	AIP Publishing
Source Title	Journal of Applied Physics
Volume (Issue)	113(20)
Page	203105-203105
Date of Issued	2013-05-23
Language	English
Handle URL	https://hdl.handle.net/11094/75672
PISSN	00218979
eISSN	10897550
NCID	AA00693547
Relation.isIdenticalTo	DOI (Publisher Version) https://doi.org/10.1063/1.4807402
Access Rights	open access
oaire:version	Version of Record
Category	学術雑誌論文 Journal Article

Resource Type	journal article
Local Type	Journal Article
DCMI Type	Text
DCTERMS.bibliographicCitation	Journal of Applied Physics. 2013, 113(20), p. 203105-203105
DC.title	Threshold improvement in uniformly lying helix cholesteric liquid crystal laser using auxiliary π-conjugated polymer active layer
DC.creator	Yoshida, Hiroyuki
	Shiozaki, Yusuke
	Inoue, Yo
	Takahashi, Masaya
	Ogawa, Yasuhiro
	Fujii, Akihiko
	Ozaki, Masanori
DC.publisher	AIP Publishing
DC.language' scheme='DCTERMS.RFC1766	English
DC.type' scheme='DCTERMS.DCMIType	Text
DCTERMS.issued' scheme='DCTERMS.W3CDTF	2013-05-23
DC.identifier	https://doi.org/10.1063/1.4807402
DC.description	This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Hiroyuki Yoshida, Yusuke Shiozaki, Yo Inoue, Masaya Takahashi, Yasuhiro Ogawa, Akihiko Fujii, and Masanori Ozaki, Journal of Applied Physics 113, 203105 (2013) and may be found at https://doi.org/10.1063/1.4807402.
DCTERMS.abstract	We propose a device structure to lower the lasing threshold of a uniformly lying helix cholesteric liquid crystal (ChLC) laser. We place a p-conjugated polymer active layer beneath the ChLC layer to provide auxiliary gain, and demonstrate an improvement in the lasing threshold by a factor of 2.3. We also perform finite difference time domain calculations coupled with rate equations for a four-level system, and clarify the effect of the additional active layer on both the photonic density of states and the inversion population density. Although the addition of an extra layer lowers the photonic density of states, the gain provided by the auxiliary layer is sufficient to overcome the losses and decrease the lasing threshold. Our concept is useful for obtaining high-performance ChLC lasers.
DC.format	75672
citation_title	Threshold improvement in uniformly lying helix cholesteric liquid crystal laser using auxiliary π-conjugated polymer active layer
citation_author	Yoshida, Hiroyuki
	Shiozaki, Yusuke
	Inoue, Yo
	Takahashi, Masaya
	Ogawa, Yasuhiro
	Fujii, Akihiko
	Ozaki, Masanori
citation_publisher	AIP Publishing
citation_language	English
citation_date	2013-05-23
citation_journal_title	Journal of Applied Physics
citation_volume	113
citation_issue	20
citation_firstpage	203105
citation_lastpage	203105
citation_doi	https://doi.org/10.1063/1.4807402
citation_public_url	https://hdl.handle.net/11094/75672

Threshold improvement in uniformly lying helix cholesteric liquid crystal laser using auxiliary π-conjugated polymer active layer

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