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Quantum Electronics and Laser Science Conference

Phase controlled atom holography

Shimizu Shimizu, Fujita Fujita, Mitake

Published Jan 1, 2000• 0 citations
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Nonlinear holography is a powerful technique for shaping beams at new optical frequencies. Selectively reconstructing target wavefront information from multichannel nonlinear holography is challenging due to the critical phase-matching condition. Herein, we propose a scheme for all-optical controlled multichannel nonlinear holography using four-wave mixing (FWM) in Rb vapor. A dispersion-controlled wavevector was dynamically tuned to achieve a full phase-matching condition for efficient target wavefront reconstruction. We adjusted the frequency and intensity of the control beam to selectively reconstruct annular vortex arrays in the FWM signal. Four switchable holographic channels were established for beam shaping via experimental parameter optimization. Our study demonstrates that the atomic system is ideal for studying nonlinear control of structured light and aids in constructing all-optical multichannel devices for classical and quantum information processing.

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Phase controlled atom holography

Fujio Shimizu, Jun‐ichi Fujita, S. Mitake

Summary form only given. We have demonstrated the manipulation of a cold neon atomic beam in a metastable state by using a silicon nitride thin film with holes that expressed the pattern of a binary hologram. The atoms that passed through the computer generated binary hologram reconstructed an arbitrary pattern of atoms on the surface of a microchannel plate detector. In this paper we describe the technique that enables us to control the reconstructed pattern in real time. We deposited regularly spaced stripes of platinum electrodes on the thin film hologram. Holes were open in the gap between the stripes, and we modulated the electric potential of the electrodes. This modulated the phase of the atom that passed through the hole in proportion to the square of the potential difference of the adjacent electrodes. Two types of phase controlled holography were demonstrated.

Quantum Electronics and Laser Science Conference•May 7, 2000•0 citations
Nonlinear holography is a powerful technique for shaping beams at new optical frequencies. Selectively reconstructing target wavefront information from multichannel nonlinear holography is challenging due to the critical phase-matching condition. Herein, we propose a scheme for all-optical controlled multichannel nonlinear holography using four-wave mixing (FWM) in Rb vapor. A dispersion-controlled wavevector was dynamically tuned to achieve a full phase-matching condition for efficient target wavefront reconstruction. We adjusted the frequency and intensity of the control beam to selectively reconstruct annular vortex arrays in the FWM signal. Four switchable holographic channels were established for beam shaping via experimental parameter optimization. Our study demonstrates that the atomic system is ideal for studying nonlinear control of structured light and aids in constructing all-optical multichannel devices for classical and quantum information processing.
Summary form only given. We have demonstrated the manipulation of a cold neon atomic beam in a metastable state by using a silicon nitride thin film with holes that expressed the pattern of a binary hologram. The atoms that passed through the computer generated binary hologram reconstructed an arbitrary pattern of atoms on the surface of a microchannel plate detector. In this paper we describe the technique that enables us to control the reconstructed pattern in real time. We deposited regularly spaced stripes of platinum electrodes on the thin film hologram. Holes were open in the gap between the stripes, and we modulated the electric potential of the electrodes. This modulated the phase of the atom that passed through the hole in proportion to the square of the potential difference of the adjacent electrodes. Two types of phase controlled holography were demonstrated.