Advanced search
1 file | 1.86 MB Add to list

Vertical-cavity surface-emitting laser with cholesteric liquid crystal overlay

Author
Organization
Abstract
We study theoretically the spectral and polarization threshold characteristics of vertical-cavity surface-emitting lasers with an overlay of cholesteric liquid crystal (CLC-VCSELs). Due to the existence of CLC band gap for circularly polarized (CP) light the polarization state of the resonant modes in the compound system evolves from linear (LP) inside the VCSEL to elliptical and circular (CP) inside the CLC. As a result, the output mirror reflectivity is increased and CLC-VCSEL threshold gain is decreased. We elucidate the transition from LP to CP state of the generated light by studying the role of the CLC thickness and the top distributed Bragg reflector reflectivity. This transition takes place for 5–6 μm thick CLC and is not gradual but happens in an oscillatory fashion. When the CLC thickness is fixed and the VCSEL top mirror reflectivity is decreased a profound gradual red shift of the resonant mode wavelength and increase of threshold gain are observed.
Keywords
ELECTRIC-FIELD, POLARIZATION PROPERTIES, STOP BAND, VCSEL, MODULATION, MODES, Cholesteric liquid crystals (CLCs), light polarization, liquid crystals (LCs), vertical-cavity surface-emitting lasers (VCSELs)

Downloads

  • (...).pdf
    • full text
    • |
    • UGent only
    • |
    • PDF
    • |
    • 1.86 MB

Citation

Please use this url to cite or link to this publication:

MLA
Panajotov, Krassimir, et al. “Vertical-Cavity Surface-Emitting Laser with Cholesteric Liquid Crystal Overlay.” JOURNAL OF LIGHTWAVE TECHNOLOGY, vol. 32, no. 1, 2014, pp. 20–26, doi:10.1109/JLT.2013.2288996.
APA
Panajotov, K., Dems, M., Belmonte, C., Thienpont, H., Xie, Y., Beeckman, J., & Neyts, K. (2014). Vertical-cavity surface-emitting laser with cholesteric liquid crystal overlay. JOURNAL OF LIGHTWAVE TECHNOLOGY, 32(1), 20–26. https://doi.org/10.1109/JLT.2013.2288996
Chicago author-date
Panajotov, Krassimir, Maciej Dems, Carlos Belmonte, Hugo Thienpont, Yi Xie, Jeroen Beeckman, and Kristiaan Neyts. 2014. “Vertical-Cavity Surface-Emitting Laser with Cholesteric Liquid Crystal Overlay.” JOURNAL OF LIGHTWAVE TECHNOLOGY 32 (1): 20–26. https://doi.org/10.1109/JLT.2013.2288996.
Chicago author-date (all authors)
Panajotov, Krassimir, Maciej Dems, Carlos Belmonte, Hugo Thienpont, Yi Xie, Jeroen Beeckman, and Kristiaan Neyts. 2014. “Vertical-Cavity Surface-Emitting Laser with Cholesteric Liquid Crystal Overlay.” JOURNAL OF LIGHTWAVE TECHNOLOGY 32 (1): 20–26. doi:10.1109/JLT.2013.2288996.
Vancouver
1.
Panajotov K, Dems M, Belmonte C, Thienpont H, Xie Y, Beeckman J, et al. Vertical-cavity surface-emitting laser with cholesteric liquid crystal overlay. JOURNAL OF LIGHTWAVE TECHNOLOGY. 2014;32(1):20–6.
IEEE
[1]
K. Panajotov et al., “Vertical-cavity surface-emitting laser with cholesteric liquid crystal overlay,” JOURNAL OF LIGHTWAVE TECHNOLOGY, vol. 32, no. 1, pp. 20–26, 2014.
@article{4196148,
  abstract     = {We study theoretically the spectral and polarization threshold characteristics of vertical-cavity surface-emitting lasers with an overlay of cholesteric liquid crystal (CLC-VCSELs). Due to the existence of CLC band gap for circularly polarized (CP) light the polarization state of the resonant modes in the compound system evolves from linear (LP) inside the VCSEL to elliptical and circular (CP) inside the CLC. As a result, the output mirror reflectivity is increased and CLC-VCSEL threshold gain is decreased. We elucidate the transition from LP to CP state of the generated light by studying the role of the CLC thickness and the top distributed
Bragg reflector reflectivity. This transition takes place for 5–6 μm thick CLC and is not gradual but happens in an oscillatory fashion. When the CLC thickness is fixed and the VCSEL top mirror reflectivity is decreased a profound gradual red shift of the resonant mode wavelength and increase of threshold gain are observed.},
  author       = {Panajotov, Krassimir and Dems, Maciej and Belmonte, Carlos and Thienpont, Hugo and Xie, Yi and Beeckman, Jeroen and Neyts, Kristiaan},
  issn         = {0733-8724},
  journal      = {JOURNAL OF LIGHTWAVE TECHNOLOGY},
  keywords     = {ELECTRIC-FIELD,POLARIZATION PROPERTIES,STOP BAND,VCSEL,MODULATION,MODES,Cholesteric liquid crystals (CLCs),light polarization,liquid crystals (LCs),vertical-cavity surface-emitting lasers (VCSELs)},
  language     = {eng},
  number       = {1},
  pages        = {20--26},
  title        = {Vertical-cavity surface-emitting laser with cholesteric liquid crystal overlay},
  url          = {http://dx.doi.org/10.1109/JLT.2013.2288996},
  volume       = {32},
  year         = {2014},
}

Altmetric
View in Altmetric
Web of Science
Times cited: