Fast, high-fidelity, all-optical and dynamically-controlled polarization gate using room-temperature atomic vapor

Published

October 21, 2014

Author(s)

Runbing Li, Chengjie Zhu, Lu Deng, Edward W. Hagley

Abstract

We demonstrate a fast, all-optical polarization gate in a room-temperature atomic medium. Using a Polarization-Selective-Kerr-Phase-Shift (PSKPS) technique, we selectively write a p phase shift to one circularly-polarized component of a linearly-polarized input signal field. The output signal field maintains its original strength but acquires a 90linear polarization rotation, demonstrating fast, high-fidelity, dynamically-controlled polarization gate operation. The intensity of the polarization-switching field used in this PKSPK-based polarization gate operation is only 2 mW/cm2 , which would be equivalent to 0.5 nW of light power (k ¼ 800 nm) confined in a typical commercial photonic hollow-core fiber. This development opens a realm of possibilities for potential future extremely low light level telecommunication and information processing systems.

Citation

Applied Physics Letters

Volume

105

Issue

(16)

Pub Type

Journals

Download Paper

https://doi.org/10.1063/1.4898857

Local Download

Keywords

quantum information, quantum computing, CNOT-polarization gate, nonlinear optics. quantum information, quantum computing, CNOT-polarization gate, nonlinear optics. quantum information, quantum computing, CNOT-polarization gate, nonlinear optics. quantum information, quantum computing, CNOT-polarization gate, nonlinear optics

Citation

Li, R. , Zhu, C. , Deng, L. and Hagley, E. (2014), Fast, high-fidelity, all-optical and dynamically-controlled polarization gate using room-temperature atomic vapor, Applied Physics Letters, [online], https://doi.org/10.1063/1.4898857, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=914628 (Accessed October 9, 2025)