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

Ultrafast femtosecond relaxation processes in luminescent and nonluminescent conducting polymers

Huang, Jiandong D.; Frolov, Sergey V.; Vardeny, Z. Valy et al.

Proceedings of SPIE - The International Society for Optical Engineering, 1997, 3145, 495-506

Number of Access:633（2025-09-02 10:24 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/76954

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Title	Ultrafast femtosecond relaxation processes in luminescent and nonluminescent conducting polymers
Creator	CreatorName Huang, Jiandong D.
	CreatorName Frolov, Sergey V.
	CreatorName Vardeny, Z. Valy
	CreatorName Chen, W.
	CreatorName Barton, Thomas J.
	CreatorName Sugimoto, R.
	NRID 1000050204186 1000050204186 ORCID 0000-0002-9556-4225 0000-0002-9556-4225 researchmap permalink read0014092 read0014092 Scopus Author ID 55490143900 55490143900 CreatorName Ozaki, Masanori
	NRID 1000070029205 1000070029205 CreatorName Yoshino, Katsumi
Subject	Femtosecond spectroscopy
	Pump-and-probe technique
	Luminescent and nonluminescent conducting polymers
	PM decay
	Polarization memory
	Bi-exponential response
Description	Optical Science, Engineering and Instrumentation '97, 1997, San Diego, CA, United States
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
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.
Publisher	SPIE
Source Title	Proceedings of SPIE - The International Society for Optical Engineering
Volume (Issue)	3145
Page	495-506
Date of Issued	1997-12-01
Language	English
Handle URL	https://hdl.handle.net/11094/76954
PISSN	0277786X
NCID	AA10619755
Relation.isIdenticalTo	DOI (Publisher Version) https://doi.org/10.1117/12.284153
Access Rights	open access
oaire:version	Version of Record
Category	会議発表論文 Conference Paper

Resource Type	conference paper
Local Type	Conference Paper
DCMI Type	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	English
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	76954
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	English
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

Ultrafast femtosecond relaxation processes in luminescent and nonluminescent conducting polymers

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