Photorefractive device with quantum wells

Details Photorefractive device with quantum wells Photorefractive device with quantum wells

1994-08-05

1996-09-24

Henry, Jon W.

Optical: systems and elements

Holographic system or element

Having particular recording medium

359 3, 359248, 257 21, G02B 518, G02B 532

Patent

active

055596134

ABSTRACT:
A photorefractive device intended to be exposed to a marking radiation which is provided so as to create a grating of interference fringes in the device and to a reading radiation diffracted by the created grating. The device includes an electro-optical material having a quantum well structure (24) and formed in an intrinsic semi-conductor matrix (22, 24) and, on both sides of the material in the semi-conductor matrix, suitable means (28, 30) to trap, both parallel to the axis of the structure and perpendicular to this axis, free carriers generated by the marking radiation.

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