Single-photon sources using two-photon absorption

Bryan C. Jacobs

doi:10.1117/12.731823

25 September 2007 Single-photon sources using two-photon absorption

Bryan C. Jacobs

Proceedings Volume 6710, Quantum Communications and Quantum Imaging V; 67100E (2007) https://doi.org/10.1117/12.731823
Event: Optical Engineering + Applications, 2007, San Diego, California, United States

Abstract

Although two-photon absorption (TPA) is a nonlinear optical process, it is not typically considered a fundamental resource for optical quantum information processing (QIP). We have recently shown that TPA and the quantum Zeno effect can be used to make deterministic quantum logic devices (Zeno gates) from an otherwise linear optical system. In a Zeno gate, TPA is used to suppress the failure events that would normally occur in a linear optics device when multiple photons exit the device in the same optical mode. We have also recently shown that additional two-photon absorbing media can be used in a more conventional manner, along with a Zeno gate, to convert weak laser pulses into heralded single photon pulses. Sources of this kind could have many potential benefits; however, the use of detectors and classical switches could limit their scalability, and therefore their usefulness in larger QIP systems. Here we describe how TPA and Zeno gates alone could be used to make more efficient, and possibly scalable, single-photon sources. Because the Zeno gates also rely on TPA, we show that the only critical enabling resource for this approach is an efficient TPA medium.

Citation Download Citation

Bryan C. Jacobs "Single-photon sources using two-photon absorption", Proc. SPIE 6710, Quantum Communications and Quantum Imaging V, 67100E (25 September 2007); https://doi.org/10.1117/12.731823

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KEYWORDS

Photons

Switching

Single photon

Switches

Sensors

Logic devices

Pulsed laser operation

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