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Phys. Rev. Lett. 101, 193902 (2008) [4 pages]

Optical Bloch Oscillations and Zener Tunneling with Nonclassical Light

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Stefano Longhi
Dipartimento di Fisica and Istituto di Fotonica e Nanotecnologie del CNR, Politecnico di Milano, Piazza L. da Vinci 32, I-20133 Milano, Italy

Received 3 September 2008; published 6 November 2008

See accompanying Physics Synopsis

A quantum theory of optical Bloch oscillations and Zener tunneling (ZT) in arrays of coupled waveguides is theoretically presented, and the particlelike behavior of photons undergoing ZT is highlighted. In singly-periodic arrays excited by a photon-number-state input beam, each photon behaves as a classical particle which independently undergoes a coin-toss ZT event with a probability described by classical Zener theory. In binary arrays, excitation with two tilted beams enables us to observe the Hong-Ou-Mandel interference for two photons undergoing Bloch-Zener oscillations.

© 2008 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.101.193902
DOI:
10.1103/PhysRevLett.101.193902
PACS:
42.82.Et, 42.50.Dv