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Abstract
We developed an in- house technology to overlay liquid crystal (LC) on top of a 850nm Vertical Cavity Surface Emitting Laser (VCSEL) creating a so-called LC-VCSEL. Prior to this, the effect of the cell thickness on the planar alignment of the E7 LC is investigated. It is observed that the LC orientation is planar, uniformly aligned over the whole cell with an average pre-tilt of 22.5 0 in a thin a cell of 13mum thickness; such alignment uniformity is not observed in a thick cell of 125mum. Nevertheless, several domains of good uniformity are still present. Further, the polarization resolved LI characteristics of LC-VCSEL are investigated with and without the insertion of LC in a cell glued directly onto VCSEL package. Before filling in the LC, the VCSEL emits linearly polarized light and this linear polarization is lost after LC filling. The output intensity as a function of polarizer angle shows partial planar alignment of the E7 LC, which is very important for the further advancement of the LC-VCSEL integrated system.
Keywords
OPTICAL FEEDBACK, SUBJECT, POLARIZATION PROPERTIES, SHORT EXTERNAL-CAVITY, LASER

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Chicago
Nair, Veena M, Krassimir Panajotov, Minko Petrov, Hugo Thienpont, Yi Xie, Jeroen Beeckman, and Kristiaan Neyts. 2012. “850nm VCSEL with a Liquid Crystal Overlay.” In Proceedings of Spie, the International Society for Optical Engineering, ed. K Panajotov, M Sciamanna, A Valle, and R Michalzik, 8432:84321X1–84321X6. Bellingham, WA, USA: SPIE.
APA
Nair, V. M., Panajotov, K., Petrov, M., Thienpont, H., Xie, Y., Beeckman, J., & Neyts, K. (2012). 850nm VCSEL with a liquid crystal overlay. In K Panajotov, M. Sciamanna, A. Valle, & R. Michalzik (Eds.), PROCEEDINGS OF SPIE, THE INTERNATIONAL SOCIETY FOR OPTICAL ENGINEERING (Vol. 8432, pp. 84321X1–84321X6). Presented at the Conference on Semiconductor Lasers and Laser Dynamics V, Bellingham, WA, USA: SPIE.
Vancouver
1.
Nair VM, Panajotov K, Petrov M, Thienpont H, Xie Y, Beeckman J, et al. 850nm VCSEL with a liquid crystal overlay. In: Panajotov K, Sciamanna M, Valle A, Michalzik R, editors. PROCEEDINGS OF SPIE, THE INTERNATIONAL SOCIETY FOR OPTICAL ENGINEERING. Bellingham, WA, USA: SPIE; 2012. p. 84321X1–84321X6.
MLA
Nair, Veena M, Krassimir Panajotov, Minko Petrov, et al. “850nm VCSEL with a Liquid Crystal Overlay.” Proceedings of Spie, the International Society for Optical Engineering. Ed. K Panajotov et al. Vol. 8432. Bellingham, WA, USA: SPIE, 2012. 84321X1–84321X6. Print.
@inproceedings{2943679,
  abstract     = {We developed an in- house technology to overlay liquid crystal (LC) on top of a 850nm Vertical Cavity Surface Emitting Laser (VCSEL) creating a so-called LC-VCSEL. Prior to this, the effect of the cell thickness on the planar alignment of the E7 LC is investigated. It is observed that the LC orientation is planar, uniformly aligned over the whole cell with an average pre-tilt of 22.5 0 in a thin a cell of 13mum thickness; such alignment uniformity is not observed in a thick cell of 125mum. Nevertheless, several domains of good uniformity are still present. Further, the polarization resolved LI characteristics of LC-VCSEL are investigated with and without the insertion of LC in a cell glued directly onto VCSEL package. Before filling in the LC, the VCSEL emits linearly polarized light and this linear polarization is lost after LC filling. The output intensity as a function of polarizer angle shows partial planar alignment of the E7 LC, which is very important for the further advancement of the LC-VCSEL integrated system.},
  articleno    = {84321X},
  author       = {Nair, Veena M and Panajotov, Krassimir and Petrov, Minko and Thienpont, Hugo and Xie, Yi and Beeckman, Jeroen and Neyts, Kristiaan},
  booktitle    = {PROCEEDINGS OF SPIE, THE INTERNATIONAL SOCIETY FOR OPTICAL ENGINEERING},
  editor       = {Panajotov, K and  Sciamanna, M and Valle, A and Michalzik, R },
  isbn         = {9780819491244},
  issn         = {0277-786X},
  keyword      = {OPTICAL FEEDBACK,SUBJECT,POLARIZATION PROPERTIES,SHORT EXTERNAL-CAVITY,LASER},
  language     = {eng},
  location     = {Brussels, Belgium},
  pages        = {84321X:84321X1--84321X:84321X6},
  publisher    = {SPIE},
  title        = {850nm VCSEL with a liquid crystal overlay},
  url          = {http://dx.doi.org/10.1117/12.922238},
  volume       = {8432},
  year         = {2012},
}

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