Lasing actions from a liquid crystalline polymer blend

Tae Woo Lee; O. Ok Park; Hyun Nam Cho; Dong Young Kim; Chung Yup Kim; Young Chul Kim

doi:10.1016/S0040-6090(01)01105-1

Lasing actions from a liquid crystalline polymer blend

Tae Woo Lee, O. Ok Park, Hyun Nam Cho, Dong Young Kim, Chung Yup Kim, Young Chul Kim

Research output: Contribution to journal › Conference article › peer-review

4 Citations (Scopus)

Abstract

We report lasing actions from fluorene-based copolymer blends with liquid crystallinity in waveguide geometry. Fluorene-based light emitting polymers, poly[2,7-bis(p-stiryl)9,9′-di-n-hexylfluorene sebacate] (PBSDHFS) and poly(9,9′-di-n-hexyl fluorenediylvinylene-alt-1,4-phenylenevinylene) (PDHFPPV), and a laser dye, 4(dicyanomethylene)-2-methyl-6-(p-dimethylaminostyryl)-4H-pyran (DCM) were used in this study. We employed Förster type energy transfer from a liquid crystalline donor to a non-crystalline acceptor to tune the color and obtain low threshold for gain narrowing. We obtained a low-threshold energy (∼20 nJ/cm² per pulse) for gain narrowing of PBSDHFS/PDHFPPV (98:2, by wt.) blend film. PBSDHFS/PDHFPPV/DCM (98:2:2, by wt.) blend film possesses a threshold energy of ∼14 μJ/cm² per pulse, while the PDHFPPV/DCM blend film did not show gain narrowing even at a pump energy as high as 12 mJ/cm² per pulse. Förster excitation energy transfer played the most important role in improving the performance of lasing actions and tuning the output colours.

Original language	English
Pages (from-to)	92-96
Number of pages	5
Journal	Thin Solid Films
Volume	393
Issue number	1-2
DOIs	https://doi.org/10.1016/S0040-6090(01)01105-1
Publication status	Published - 1 Aug 2001
Event	4th International Conference on Nano-Molecular Electronics - Kobe, Japan Duration: 5 Dec 2000 → 7 Dec 2000

Keywords

Energy transfer
Laser
Liquid crystalline blend

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10.1016/S0040-6090(01)01105-1

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title = "Lasing actions from a liquid crystalline polymer blend",

abstract = "We report lasing actions from fluorene-based copolymer blends with liquid crystallinity in waveguide geometry. Fluorene-based light emitting polymers, poly[2,7-bis(p-stiryl)9,9′-di-n-hexylfluorene sebacate] (PBSDHFS) and poly(9,9′-di-n-hexyl fluorenediylvinylene-alt-1,4-phenylenevinylene) (PDHFPPV), and a laser dye, 4(dicyanomethylene)-2-methyl-6-(p-dimethylaminostyryl)-4H-pyran (DCM) were used in this study. We employed F{\"o}rster type energy transfer from a liquid crystalline donor to a non-crystalline acceptor to tune the color and obtain low threshold for gain narrowing. We obtained a low-threshold energy (∼20 nJ/cm2 per pulse) for gain narrowing of PBSDHFS/PDHFPPV (98:2, by wt.) blend film. PBSDHFS/PDHFPPV/DCM (98:2:2, by wt.) blend film possesses a threshold energy of ∼14 μJ/cm2 per pulse, while the PDHFPPV/DCM blend film did not show gain narrowing even at a pump energy as high as 12 mJ/cm2 per pulse. F{\"o}rster excitation energy transfer played the most important role in improving the performance of lasing actions and tuning the output colours.",

keywords = "Energy transfer, Laser, Liquid crystalline blend",

author = "Lee, {Tae Woo} and Park, {O. Ok} and Cho, {Hyun Nam} and Kim, {Dong Young} and Kim, {Chung Yup} and Kim, {Young Chul}",

year = "2001",

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doi = "10.1016/S0040-6090(01)01105-1",

language = "English",

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pages = "92--96",

journal = "Thin Solid Films",

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TY - JOUR

T1 - Lasing actions from a liquid crystalline polymer blend

AU - Lee, Tae Woo

AU - Park, O. Ok

AU - Cho, Hyun Nam

AU - Kim, Dong Young

AU - Kim, Chung Yup

AU - Kim, Young Chul

PY - 2001/8/1

Y1 - 2001/8/1

N2 - We report lasing actions from fluorene-based copolymer blends with liquid crystallinity in waveguide geometry. Fluorene-based light emitting polymers, poly[2,7-bis(p-stiryl)9,9′-di-n-hexylfluorene sebacate] (PBSDHFS) and poly(9,9′-di-n-hexyl fluorenediylvinylene-alt-1,4-phenylenevinylene) (PDHFPPV), and a laser dye, 4(dicyanomethylene)-2-methyl-6-(p-dimethylaminostyryl)-4H-pyran (DCM) were used in this study. We employed Förster type energy transfer from a liquid crystalline donor to a non-crystalline acceptor to tune the color and obtain low threshold for gain narrowing. We obtained a low-threshold energy (∼20 nJ/cm2 per pulse) for gain narrowing of PBSDHFS/PDHFPPV (98:2, by wt.) blend film. PBSDHFS/PDHFPPV/DCM (98:2:2, by wt.) blend film possesses a threshold energy of ∼14 μJ/cm2 per pulse, while the PDHFPPV/DCM blend film did not show gain narrowing even at a pump energy as high as 12 mJ/cm2 per pulse. Förster excitation energy transfer played the most important role in improving the performance of lasing actions and tuning the output colours.

AB - We report lasing actions from fluorene-based copolymer blends with liquid crystallinity in waveguide geometry. Fluorene-based light emitting polymers, poly[2,7-bis(p-stiryl)9,9′-di-n-hexylfluorene sebacate] (PBSDHFS) and poly(9,9′-di-n-hexyl fluorenediylvinylene-alt-1,4-phenylenevinylene) (PDHFPPV), and a laser dye, 4(dicyanomethylene)-2-methyl-6-(p-dimethylaminostyryl)-4H-pyran (DCM) were used in this study. We employed Förster type energy transfer from a liquid crystalline donor to a non-crystalline acceptor to tune the color and obtain low threshold for gain narrowing. We obtained a low-threshold energy (∼20 nJ/cm2 per pulse) for gain narrowing of PBSDHFS/PDHFPPV (98:2, by wt.) blend film. PBSDHFS/PDHFPPV/DCM (98:2:2, by wt.) blend film possesses a threshold energy of ∼14 μJ/cm2 per pulse, while the PDHFPPV/DCM blend film did not show gain narrowing even at a pump energy as high as 12 mJ/cm2 per pulse. Förster excitation energy transfer played the most important role in improving the performance of lasing actions and tuning the output colours.

KW - Energy transfer

KW - Laser

KW - Liquid crystalline blend

UR - http://www.scopus.com/inward/record.url?scp=0035422314&partnerID=8YFLogxK

U2 - 10.1016/S0040-6090(01)01105-1

DO - 10.1016/S0040-6090(01)01105-1

M3 - Conference article

AN - SCOPUS:0035422314

SN - 0040-6090

VL - 393

SP - 92

EP - 96

JO - Thin Solid Films

JF - Thin Solid Films

IS - 1-2

T2 - 4th International Conference on Nano-Molecular Electronics

Y2 - 5 December 2000 through 7 December 2000

ER -

Lasing actions from a liquid crystalline polymer blend

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Keywords

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