Dynamic self-enhanced diffraction from written photorefractive gratings

Liangmin Zhang; Paras N. Prasad; Ryszard Burzynski; Huanchu Chen; Jianru Han

doi:10.1063/1.371920

Dynamic self-enhanced diffraction from written photorefractive gratings

Liangmin Zhang
, Paras N. Prasad
, Ryszard Burzynski
, Huanchu Chen
, Jianru Han

Chemistry

SUNY Buffalo
Laser Photonics Technology, Inc.
Shandong University

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

The self-enhanced diffraction with oscillatory behavior for unfixed holograms is observed and investigated in new photorefractive (K_1-xNa_x)_2m(Sr_1-yBa _y)_1-mNb₂O₆ crystals. The recorded diffraction efficiency can be increased 10 times during the readout process. The maximum peak diffraction efficiency obtained is close to unity. A closed solution of dynamic two-wave mixing equations and a coupling coefficient expression obtained from the standard band transport model are used to fit the observed results. The observed self-enhancement is caused by the interference between a new grating, formed by the reading beam and the diffracted signal, and the existing grating. The fitted results show that the internal space-charge field originating from the photovoltaic effect and the pyroelectric effect can reduce the phase shift.

Original language	English
Pages (from-to)	643-648
Number of pages	6
Journal	Journal of Applied Physics
Volume	87
Issue number	2
DOIs	https://doi.org/10.1063/1.371920
State	Published - Jan 15 2000

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title = "Dynamic self-enhanced diffraction from written photorefractive gratings",

abstract = "The self-enhanced diffraction with oscillatory behavior for unfixed holograms is observed and investigated in new photorefractive (K1-xNax)2m(Sr1-yBa y)1-mNb2O6 crystals. The recorded diffraction efficiency can be increased 10 times during the readout process. The maximum peak diffraction efficiency obtained is close to unity. A closed solution of dynamic two-wave mixing equations and a coupling coefficient expression obtained from the standard band transport model are used to fit the observed results. The observed self-enhancement is caused by the interference between a new grating, formed by the reading beam and the diffracted signal, and the existing grating. The fitted results show that the internal space-charge field originating from the photovoltaic effect and the pyroelectric effect can reduce the phase shift.",

author = "Liangmin Zhang and Prasad, \{Paras N.\} and Ryszard Burzynski and Huanchu Chen and Jianru Han",

year = "2000",

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T1 - Dynamic self-enhanced diffraction from written photorefractive gratings

AU - Zhang, Liangmin

AU - Prasad, Paras N.

AU - Burzynski, Ryszard

AU - Chen, Huanchu

AU - Han, Jianru

PY - 2000/1/15

Y1 - 2000/1/15

N2 - The self-enhanced diffraction with oscillatory behavior for unfixed holograms is observed and investigated in new photorefractive (K1-xNax)2m(Sr1-yBa y)1-mNb2O6 crystals. The recorded diffraction efficiency can be increased 10 times during the readout process. The maximum peak diffraction efficiency obtained is close to unity. A closed solution of dynamic two-wave mixing equations and a coupling coefficient expression obtained from the standard band transport model are used to fit the observed results. The observed self-enhancement is caused by the interference between a new grating, formed by the reading beam and the diffracted signal, and the existing grating. The fitted results show that the internal space-charge field originating from the photovoltaic effect and the pyroelectric effect can reduce the phase shift.

AB - The self-enhanced diffraction with oscillatory behavior for unfixed holograms is observed and investigated in new photorefractive (K1-xNax)2m(Sr1-yBa y)1-mNb2O6 crystals. The recorded diffraction efficiency can be increased 10 times during the readout process. The maximum peak diffraction efficiency obtained is close to unity. A closed solution of dynamic two-wave mixing equations and a coupling coefficient expression obtained from the standard band transport model are used to fit the observed results. The observed self-enhancement is caused by the interference between a new grating, formed by the reading beam and the diffracted signal, and the existing grating. The fitted results show that the internal space-charge field originating from the photovoltaic effect and the pyroelectric effect can reduce the phase shift.

UR - https://www.scopus.com/pages/publications/0042730602

U2 - 10.1063/1.371920

DO - 10.1063/1.371920

M3 - Article

AN - SCOPUS:0042730602

SN - 0021-8979

VL - 87

SP - 643

EP - 648

JO - Journal of Applied Physics

JF - Journal of Applied Physics

IS - 2

ER -

Dynamic self-enhanced diffraction from written photorefractive gratings

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