TY - GEN
T1 - 850nm VCSEL with a liquid crystal overlay
AU - Nair, Veena M.
AU - Panajotov, Krassimir
AU - Petrov, Mikov
AU - Thienpont, Hugo
AU - Xie, Yi
AU - Beeckman, Jeroen
AU - Neyts, Kristiaan
PY - 2012
Y1 - 2012
N2 - 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 13μm thickness; such alignment uniformity is not observed in a thick cell of 125μm. 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.
AB - 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 13μm thickness; such alignment uniformity is not observed in a thick cell of 125μm. 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.
UR - https://www.webofscience.com/wos/woscc/full-record/WOS:000305707200047
UR - https://openalex.org/W1971627714
UR - https://www.scopus.com/pages/publications/84862297481
U2 - 10.1117/12.922238
DO - 10.1117/12.922238
M3 - Conference Paper published in a book
SN - 9780819491244
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - Semiconductor Lasers and Laser Dynamics V
T2 - Semiconductor Lasers and Laser Dynamics V
Y2 - 16 April 2012 through 19 April 2012
ER -