| | |
Summary: Design of an integrated optical source of twin photons
Ivan Avrutsky
Department of Electrical and Computer Engineering, Wayne State University, Detroit, Michigan 48202, USA
Alexander V. Sergienko
Department of Electrical & Computer Engineering and Department of Physics, Boston University, Boston, Massachusetts 02215, USA
Received 10 September 2004; revised manuscript received 21 December 2004; published 22 March 2005
The phase matching for the nonlinear process of frequency-degenerated spontaneous parametric downcon-
version in tunneling-coupled channel waveguides is analyzed. The use of type II nonlinear interaction with
individual photons in each pair appearing in different output channels allows for constructing polarization
entangled states for quantum information processing applications.
DOI: 10.1103/PhysRevA.71.033812 PACS number s : 42.65.Lm, 42.82. m, 42.79.Gn, 42.25.Bs
I. INTRODUCTION
Several novel areas of quantum-information processing
including quantum cryptography, quantum teleportation, and
linear-optical quantum computing have recently become a
subject of intensive experimental research 1,2 . Sources of
entangled photons based on bulk nonlinear crystals such as
beta-barium borate -BBO 3 have been widely used in
early experiments. The development of robust, efficient, and
compact sources of entangled photons has become a neces-
|
