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Asia Communications and Photonics Conference

Nonclassical light in array of single mode optical waveguides

Ali Rostami, Alisa Javadi

Published Dec 1, 2010• 0 citations
Publisher

Abstract

We investigate propagation of squeezed light in array of coupled waveguides which has tremendous potential for applications in engineering. We take a look at the possibility of Talbot effect with squeezed states of light. We also demonstrate how Hong-Ou-Mandel effect may be engineered to be relatively immune to fabrication imperfections.
DOI
10.1109/acp.2010.5682758

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We study the transport and quantum walk of nonclassical light in an array of coupled waveguides which have properties like very low decoherence and thus making them ideal for storage of quantum information. We show how squeezing gets turned over from one waveguide to another. We further show how input nonclassical light can generate entanglement among different waveguides. Our results, which are valid for an arbitrary number of waveguides, involve both first quantization due to array structure and second quantization due to the quantum nature of fields and can also be used to discuss the Talbot effect in the quantum regime.
Interference effects of photon pairs propagating through two-dimensional lattices of evanescently coupled waveguides are theoretically analyzed for input states of independent and path-entangled photons. Their correlation unveils characteristic Hong-Ou-Mandel interferences as well as more complex phenomena unique to these structures. Furthermore, purely classical states of light are used to simulate these quantum interferences in intensity correlation experiments. The results suggest that waveguide arrays can be employed as convenient devices for manipulating quantum states of light.