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 22.50 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.
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