Holographic
Recording Properties of BR-D96N Film
ZHENG Yuan, YAO Bao-Li*, WANG Ying-Li, LEI Ming, MENKE
Neimule, CHENG Guo-Fu, HAMPP Norbert1
( State
Key Laboratory of Transient Optics Technology， Xi’an Institute of Optics and
Precision Mechanics, the Chinese Academy of Sciences, Xi’an 710068, China; 1Institute of Physical Chemistry, University of
Marburg, D-35032 Marburg, Germany )
Abstract BR-D96N
was a genetically mutated product of bacteriorhodopsin (BR) with obvious
improved photochromic effect. Compared with the wild type BR, BR-D96N had a
lifetime of M state prolonged to 5 min, showing obvious saturation absorption
and lower light intensity in saturation absorption (0.4 mW/cm2). In
case of holographic recording, dynamic grating was recorded in the BR-D96N
film, its characteristic parameter was not light exposure energy but light
intensity. The writing time of the holographic grating depended on the
recording light intensity. The higher the recording light intensity, the faster
the grating builds up. Under a weak reconstruction light, the recording light
intensity resulting in maximal diffraction efficiency was consistent with the
saturation absorption intensity. The reconstruction light could partly erase the
grating. With lower intensity of reconstruction light, higher diffraction
efficiency (1.8%) could be reached, but the diffraction intensity was not high.
To get highest diffraction intensity, a properly high intensity of
reconstruction light was needed (80 mW/cm2). The result of these experiments showed
that holographic images could be recorded on the BR-D96N film.
Key words bacteriorhodopsin;
BR-D96N; holographic recording; photochromism
*Corresponding
author: Tel, 86-29-8472069; Fax, 86-29-8498711; e-mail,
[email protected]