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

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 π 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 90° linear 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/cm{sup 2}, which would be equivalent to 0.5 nW of light power (λ = 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.
Authors:
 [1] ;  [2] ;  [2] ;  [1] ;  [2] ; ;  [1]
  1. National Institute of Standards and Technology, Gaithersburg, Maryland 20899 (United States)
  2. (China)
Publication Date:
OSTI Identifier:
22350938
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 16; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; FIBERS; KERR EFFECT; PHASE SHIFT; POLARIZATION; ROTATION; TEMPERATURE RANGE 0273-0400 K; VISIBLE RADIATION