Band-tunable color cone lasing emission based on a dye-doped cholesteric liquid crystal film

Chia Rong Lee, S. H. Lin, H. C. Yeh, T. D. Ji, J. H. Liu, P. C. Yang, T. S. Mo, S. Y. Huang, C. T. Kuo, K. Y. Lo, Andy Y. Fuh

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This investigation reports for the first time a novel phenomenon, called band-tunable color cone lasing emission (CCLE), based on a single-pitched one-dimensional photonic crystal-like dye-doped cholesteric liquid crystal (DDCLC) cell. The lasing wavelength in the CCLE pattern is distributed continuously at 676.7-595.6 nm as the oblique angle increases continuously from 0° to 50° relative to the helical axis. The variation of the lasing wavelength in the CCLE with the oblique angle is consistent with that of the wavelength at the long-wavelength edge (LWE) of the CLC reflection band (CLCRB) with the oblique angle. Simulation results obtained utilizing Berreman's 4x4 matrix method show that, at each oblique angle, the associated group velocity and density of photonic state (DOS) are near zero and large at the shortwavelength edge (SWE) and LWE of the CLCRB, respectively, and are in good agreement with experimental results. The particularly strong lasing ring emission at a cone angle of ∼35° can be explained to be likely due to a special effect that, under the condition of overlap between the LWE of the CLCRB measured at 35° and the SWE of the CLCRB measured at 0°, the LWE and SWE fluorescence propagating along 35° and 0°, respectively, may indirectly enhance each other due to individual enhanced rate of spontaneous emission. Furthermore, the lasing band of the CCLE can be tuned from long-wavelength (deep red-orange) to short-wavelength (orange-green) regions by changing the concentration of the chiral or by the photo-irradiation on a DDCLC cell with a photoisoemerizable chiral dopant.

Original languageEnglish
Title of host publicationEmerging Liquid Crystal Technologies V
DOIs
Publication statusPublished - 2010 May 7
EventEmerging Liquid Crystal Technologies V - San Francisco, CA, United States
Duration: 2010 Jan 252010 Jan 27

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume7618
ISSN (Print)0277-786X

Other

OtherEmerging Liquid Crystal Technologies V
CountryUnited States
CitySan Francisco, CA
Period10-01-2510-01-27

Fingerprint

Cholesteric liquid crystals
Dyes
doped crystals
Liquid Crystal
lasing
Cones
cones
Cone
Coloring Agents
dyes
liquid crystals
Wavelength
Color
color
wavelengths
Oblique
Angle
photonics
Special effects
Group Velocity

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

Cite this

Lee, C. R., Lin, S. H., Yeh, H. C., Ji, T. D., Liu, J. H., Yang, P. C., ... Fuh, A. Y. (2010). Band-tunable color cone lasing emission based on a dye-doped cholesteric liquid crystal film. In Emerging Liquid Crystal Technologies V [76180Y] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 7618). https://doi.org/10.1117/12.840594
Lee, Chia Rong ; Lin, S. H. ; Yeh, H. C. ; Ji, T. D. ; Liu, J. H. ; Yang, P. C. ; Mo, T. S. ; Huang, S. Y. ; Kuo, C. T. ; Lo, K. Y. ; Fuh, Andy Y. / Band-tunable color cone lasing emission based on a dye-doped cholesteric liquid crystal film. Emerging Liquid Crystal Technologies V. 2010. (Proceedings of SPIE - The International Society for Optical Engineering).
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title = "Band-tunable color cone lasing emission based on a dye-doped cholesteric liquid crystal film",
abstract = "This investigation reports for the first time a novel phenomenon, called band-tunable color cone lasing emission (CCLE), based on a single-pitched one-dimensional photonic crystal-like dye-doped cholesteric liquid crystal (DDCLC) cell. The lasing wavelength in the CCLE pattern is distributed continuously at 676.7-595.6 nm as the oblique angle increases continuously from 0° to 50° relative to the helical axis. The variation of the lasing wavelength in the CCLE with the oblique angle is consistent with that of the wavelength at the long-wavelength edge (LWE) of the CLC reflection band (CLCRB) with the oblique angle. Simulation results obtained utilizing Berreman's 4x4 matrix method show that, at each oblique angle, the associated group velocity and density of photonic state (DOS) are near zero and large at the shortwavelength edge (SWE) and LWE of the CLCRB, respectively, and are in good agreement with experimental results. The particularly strong lasing ring emission at a cone angle of ∼35° can be explained to be likely due to a special effect that, under the condition of overlap between the LWE of the CLCRB measured at 35° and the SWE of the CLCRB measured at 0°, the LWE and SWE fluorescence propagating along 35° and 0°, respectively, may indirectly enhance each other due to individual enhanced rate of spontaneous emission. Furthermore, the lasing band of the CCLE can be tuned from long-wavelength (deep red-orange) to short-wavelength (orange-green) regions by changing the concentration of the chiral or by the photo-irradiation on a DDCLC cell with a photoisoemerizable chiral dopant.",
author = "Lee, {Chia Rong} and Lin, {S. H.} and Yeh, {H. C.} and Ji, {T. D.} and Liu, {J. H.} and Yang, {P. C.} and Mo, {T. S.} and Huang, {S. Y.} and Kuo, {C. T.} and Lo, {K. Y.} and Fuh, {Andy Y.}",
year = "2010",
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Lee, CR, Lin, SH, Yeh, HC, Ji, TD, Liu, JH, Yang, PC, Mo, TS, Huang, SY, Kuo, CT, Lo, KY & Fuh, AY 2010, Band-tunable color cone lasing emission based on a dye-doped cholesteric liquid crystal film. in Emerging Liquid Crystal Technologies V., 76180Y, Proceedings of SPIE - The International Society for Optical Engineering, vol. 7618, Emerging Liquid Crystal Technologies V, San Francisco, CA, United States, 10-01-25. https://doi.org/10.1117/12.840594

Band-tunable color cone lasing emission based on a dye-doped cholesteric liquid crystal film. / Lee, Chia Rong; Lin, S. H.; Yeh, H. C.; Ji, T. D.; Liu, J. H.; Yang, P. C.; Mo, T. S.; Huang, S. Y.; Kuo, C. T.; Lo, K. Y.; Fuh, Andy Y.

Emerging Liquid Crystal Technologies V. 2010. 76180Y (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 7618).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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T1 - Band-tunable color cone lasing emission based on a dye-doped cholesteric liquid crystal film

AU - Lee, Chia Rong

AU - Lin, S. H.

AU - Yeh, H. C.

AU - Ji, T. D.

AU - Liu, J. H.

AU - Yang, P. C.

AU - Mo, T. S.

AU - Huang, S. Y.

AU - Kuo, C. T.

AU - Lo, K. Y.

AU - Fuh, Andy Y.

PY - 2010/5/7

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N2 - This investigation reports for the first time a novel phenomenon, called band-tunable color cone lasing emission (CCLE), based on a single-pitched one-dimensional photonic crystal-like dye-doped cholesteric liquid crystal (DDCLC) cell. The lasing wavelength in the CCLE pattern is distributed continuously at 676.7-595.6 nm as the oblique angle increases continuously from 0° to 50° relative to the helical axis. The variation of the lasing wavelength in the CCLE with the oblique angle is consistent with that of the wavelength at the long-wavelength edge (LWE) of the CLC reflection band (CLCRB) with the oblique angle. Simulation results obtained utilizing Berreman's 4x4 matrix method show that, at each oblique angle, the associated group velocity and density of photonic state (DOS) are near zero and large at the shortwavelength edge (SWE) and LWE of the CLCRB, respectively, and are in good agreement with experimental results. The particularly strong lasing ring emission at a cone angle of ∼35° can be explained to be likely due to a special effect that, under the condition of overlap between the LWE of the CLCRB measured at 35° and the SWE of the CLCRB measured at 0°, the LWE and SWE fluorescence propagating along 35° and 0°, respectively, may indirectly enhance each other due to individual enhanced rate of spontaneous emission. Furthermore, the lasing band of the CCLE can be tuned from long-wavelength (deep red-orange) to short-wavelength (orange-green) regions by changing the concentration of the chiral or by the photo-irradiation on a DDCLC cell with a photoisoemerizable chiral dopant.

AB - This investigation reports for the first time a novel phenomenon, called band-tunable color cone lasing emission (CCLE), based on a single-pitched one-dimensional photonic crystal-like dye-doped cholesteric liquid crystal (DDCLC) cell. The lasing wavelength in the CCLE pattern is distributed continuously at 676.7-595.6 nm as the oblique angle increases continuously from 0° to 50° relative to the helical axis. The variation of the lasing wavelength in the CCLE with the oblique angle is consistent with that of the wavelength at the long-wavelength edge (LWE) of the CLC reflection band (CLCRB) with the oblique angle. Simulation results obtained utilizing Berreman's 4x4 matrix method show that, at each oblique angle, the associated group velocity and density of photonic state (DOS) are near zero and large at the shortwavelength edge (SWE) and LWE of the CLCRB, respectively, and are in good agreement with experimental results. The particularly strong lasing ring emission at a cone angle of ∼35° can be explained to be likely due to a special effect that, under the condition of overlap between the LWE of the CLCRB measured at 35° and the SWE of the CLCRB measured at 0°, the LWE and SWE fluorescence propagating along 35° and 0°, respectively, may indirectly enhance each other due to individual enhanced rate of spontaneous emission. Furthermore, the lasing band of the CCLE can be tuned from long-wavelength (deep red-orange) to short-wavelength (orange-green) regions by changing the concentration of the chiral or by the photo-irradiation on a DDCLC cell with a photoisoemerizable chiral dopant.

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Lee CR, Lin SH, Yeh HC, Ji TD, Liu JH, Yang PC et al. Band-tunable color cone lasing emission based on a dye-doped cholesteric liquid crystal film. In Emerging Liquid Crystal Technologies V. 2010. 76180Y. (Proceedings of SPIE - The International Society for Optical Engineering). https://doi.org/10.1117/12.840594