Ultrafast femtosecond relaxation processes in luminescent and nonluminescent conducting polymers

Huang, Jiandong D.; Frolov, Sergey V.; Vardeny, Z. Valy; Chen, W.; Barton, Thomas J.; Sugimoto, R.; Ozaki, Masanori; Yoshino, Katsumi

doi:https://doi.org/10.1117/12.284153

アクセス数:135件（2024-04-20 08:46 集計）

固定URL: https://hdl.handle.net/11094/76954

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タイトル	Ultrafast femtosecond relaxation processes in luminescent and nonluminescent conducting polymers
著者	著者名 Huang, Jiandong D.
	著者名 Frolov, Sergey V.
	著者名 Vardeny, Z. Valy
	著者名 Chen, W.
	著者名 Barton, Thomas J.
	著者名 Sugimoto, R.
	NRID 1000050204186 1000050204186 ORCID 0000-0002-9556-4225 0000-0002-9556-4225 researchmap permalink read0014092 read0014092 Scopus Author ID 55490143900 55490143900 著者名 Ozaki, Masanori
	NRID 1000070029205 1000070029205 著者名 Yoshino, Katsumi
キーワード等	Femtosecond spectroscopy
	Pump-and-probe technique
	Luminescent and nonluminescent conducting polymers
	PM decay
	Polarization memory
	Bi-exponential response
内容	Optical Science, Engineering and Instrumentation '97, 1997, San Diego, CA, United States
内容	Jiandong D. Huang, Sergey V. Frolov, Z. Valy Vardeny, W. Chen, Thomas J. Barton, R. Sugimoto, Masanori Ozaki, and Katsumi Yoshino "Ultrafast femtosecond relaxation processes in luminescent and nonluminescent conducting polymers", Proc. SPIE 3145, Optical Probes of Conjugated Polymers, (1 December 1997). DOI: https://doi.org/10.1117/12.284153
抄録	We have employed the time-resolved photomodulation (PM) technique to study the photoexcitation dynamics of a luminescent (Si-PT) and nonluminescent (s-(CH)x) conducting polymers in the low signal limit. In each polymer, we identify two exponential decay processes in the PM decay, with characteristic time constants T1 and T2, where T1 is of order 1 ps and T2 depends on the specific polymer; T2 in Si-PT is about 50 ps, whereas T2 in s-(CH)x is about 5 ps. The difference in T2 is tentatively attributed to radiative and non-radiative recombination kinetics, respectively. We also found that the PM decay does not show any obvious temperature and intensity dependences, whereas the polarization memory decay is longer at low temperatures.
出版者	SPIE
収録物名	Proceedings of SPIE - The International Society for Optical Engineering
巻(号)	3145
ページ	495-506
刊行年月	1997-12-01
言語	英語
ハンドルURL	https://hdl.handle.net/11094/76954
PISSN	0277786X
NCID	AA10619755
関連情報 (isIdenticalTo)	DOI (出版社版) https://doi.org/10.1117/12.284153
アクセス権	open access
出版タイプ	Version of Record
カテゴリ	会議発表論文 Conference Paper

資源タイプ	会議発表論文
ローカル資源タイプ	会議発表論文
DCMI資源タイプ	text
DCTERMS.bibliographicCitation	Proceedings of SPIE - The International Society for Optical Engineering. 1997, 3145, p. 495-506
DC.title	Ultrafast femtosecond relaxation processes in luminescent and nonluminescent conducting polymers
DC.creator	Huang, Jiandong D.
	Frolov, Sergey V.
	Vardeny, Z. Valy
	Chen, W.
	Barton, Thomas J.
	Sugimoto, R.
	Ozaki, Masanori
	Yoshino, Katsumi
DC.publisher	SPIE
DC.language' scheme='DCTERMS.RFC1766	英語
DC.type' scheme='DCTERMS.DCMIType	text
DCTERMS.issued' scheme='DCTERMS.W3CDTF	1997-12-01
DC.identifier	https://doi.org/10.1117/12.284153
DC.subject	Femtosecond spectroscopy
	Pump-and-probe technique
	Luminescent and nonluminescent conducting polymers
	PM decay
	Polarization memory
	Bi-exponential response
DC.description	Optical Science, Engineering and Instrumentation '97, 1997, San Diego, CA, United States
DC.description	Jiandong D. Huang, Sergey V. Frolov, Z. Valy Vardeny, W. Chen, Thomas J. Barton, R. Sugimoto, Masanori Ozaki, and Katsumi Yoshino "Ultrafast femtosecond relaxation processes in luminescent and nonluminescent conducting polymers", Proc. SPIE 3145, Optical Probes of Conjugated Polymers, (1 December 1997). DOI: https://doi.org/10.1117/12.284153
DCTERMS.abstract	We have employed the time-resolved photomodulation (PM) technique to study the photoexcitation dynamics of a luminescent (Si-PT) and nonluminescent (s-(CH)x) conducting polymers in the low signal limit. In each polymer, we identify two exponential decay processes in the PM decay, with characteristic time constants T1 and T2, where T1 is of order 1 ps and T2 depends on the specific polymer; T2 in Si-PT is about 50 ps, whereas T2 in s-(CH)x is about 5 ps. The difference in T2 is tentatively attributed to radiative and non-radiative recombination kinetics, respectively. We also found that the PM decay does not show any obvious temperature and intensity dependences, whereas the polarization memory decay is longer at low temperatures.
DC.format	application/pdf
citation_title	Ultrafast femtosecond relaxation processes in luminescent and nonluminescent conducting polymers
citation_author	Huang, Jiandong D.
	Frolov, Sergey V.
	Vardeny, Z. Valy
	Chen, W.
	Barton, Thomas J.
	Sugimoto, R.
	Ozaki, Masanori
	Yoshino, Katsumi
citation_publisher	SPIE
citation_language	英語
citation_date	1997-12-01
citation_journal_title	Proceedings of SPIE - The International Society for Optical Engineering
citation_volume	3145
citation_firstpage	495
citation_lastpage	506
citation_doi	https://doi.org/10.1117/12.284153
citation_public_url	https://hdl.handle.net/11094/76954

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