Abstract

The interferometric control of an optical beam is one of the most sensitive means to modulate light. Multiple beam interference forms the basis of a new class of quantum-well asymmetric Fabry-Perot reflection modulators.¹ Intensity contrast ratios exceeding 1000:1 are possible in these electroabsorption structures by operating near the anti-reflection condition.² In this paper, we report the first demonstration of photorefractive quantum wells fabricated as asymmetric Fabry-Perot structures. These devices operate on-resonance in reflection. The multiple beam interference increases the diffraction efficiency by over an order of magnitude compared to the traditional nonresonant transmission devices. This makes large diffraction efficiencies possible using small applied electric fields. These structures realize the full potential of photorefractive quantum wells.

© 1994 Optical Society of America