In a broad sense, my experience is in the design, analysis, fabrication, and application of novel optical elements. These elements can into two categories: polarization gratings and multi-twist retarders. In the case of polarization gratings, the key aspect is the control of patterning in the plane of the element (2D or x-y plane, perpendicular to beam propagation). In the case of multi-twist retarders, the patterning is controlled mainly along the thickness (z direction, along the propagation direction). These two elements individually and in combination provide unprecedented control of optical properties. Several versions of these have been implemented for various applications, and are being commercialized by ImagineOptix.
I have been involved in fundamentally understanding various aspects of PGs and MTRs, and applying them toward several applications including light shutters, portable projectors, polarization conversion systems, 3D glasses etc. I have also been a key part of developing new holographic/lithographic approaches for patterning PGs suitable for large volume manufacturing. In collaboration with ImagineOptix, I supervize an international manufacturing team in this effort.
My research has resulted in 7 patents (3 granted, 4 pending) and 17 research publications so far.