Holographic arrays based on semiconductor microstructures

Abstract

A concept of complex reflectivity modulation is proposed based on the electrical control of quantum well exciton resonances that influence the propagation of light in a layered semiconductor structure. By variation in exciton energies, both the intensity and the phase of reflected light can be fully controlled. Unlike previous devices, for full complex light modulation, the design is based on a single device in a single structure. The device allows complete 100% intensity contrast and allows for the construction of small pixel sizes with fast response times.

Optical diode based on exciton-polaritons

“…Polaritons are quasi-particles resulting from the strong coupling of photons and quantum well excitons. This origin has provided them with a low mass and strong nonlinear interactions -characteristics that have made them successful building blocks for multiple photonic devices, such as lasers [3][4][5][6] , interferometers 7,8 , holographic devices 9 , terahertz emitters 10,11 , optical routers 12 , transistors 13,14 and integrated photonic circuits 15,16 , among others 17 . With such a variety of applications, it would seem that a new era of polaritonics is close.…”