Optically induced birefringence in bacteriorhodopsin as an optical limiter

Abstract

Experimental data are presented, which demonstrates an optical limiter based on a large birefringence which is optically induced in bacteriorhodopsin. The induced birefringence is observed to be a function of incident intensity, but saturates at a value of about 0.454 W/cm2. A measured value of Δn of 6.6×10−4 at a wavelength of 514 nm is reported. The observed birefringence is found to be in good agreement with a proposed model.

<title>Novel diffractive dynamical elements: DDE based on adaptive supergrating</title>

“…1. Using equation (2) for amplitude a wave coming through linear polarizer P((p): a0=P(cp)a(zo) (5) where P((p) = T (q)) P(0) T(p)', P(0) -is matrix of linear polarizer 100 P(O)= 0 0 0 (K11)"2 000 where (K1 1)1/2 is major transmitting axis, T (p) is rotated matrix. The ratio 'signal"noise is: (6) = J a0j2/ja°j2 = (J3bo2sin2qilN)2K1 ,1K22 (6) where K22 is major absorbing axis.…”

<title>Highly effective diffractive adaptive holographic element for dynamic image processing</title>

“…It causes application to long time storage and does not applicable to on line monitoring. The shortest response time bacteriorhodopsine polymer films have small diffraction efficiency in the range of 1 % -6 % [5]. The thermoplastic materials needs pretreatment like as heating, electrical field application (kilovolts) and have small number of cycles [6].…”

Anisotropic patterns formed in Ag–As–S ion-conducting amorphous semiconductor films by polarized light

“…10,11,[13][14][15] The changes induced in macroscopic properties, however, have not been prominent. [2][3][4]7,8,10,11,[13][14][15][16]19 Here we report that linearly polarized light can produce an anisotropic surface corrugation in an ion-conducting amorphous semiconductor film Ag-As-S. [2][3][4]7,8,10,11,[13][14][15][16]19 Here we report that linearly polarized light can produce an anisotropic surface corrugation in an ion-conducting amorphous semiconductor film Ag-As-S.…”