Chemical Physics Letters, Vol.530, 113-119, 2012
Orientation of a bacteriorhodopsin thin film deposited by dip coating technique and its chiral SHG as studied by SHG interference technique
We show that by observing SHG interference bR thin films prepared by a simple dip coating technique have a polar orientation with C-infinity symmetry. The SHG interference measurements were performed under various input and output polarization combinations at different incident angles or under the rotation of the quarter-wave retardation plate at specific incident angles. The interference patterns provide us with insight into the characteristics of non-vanishing nonlinear optical coefficients including chiral components. Abundant information can be obtained by observing SHG interference by using two chiral SH active films. (C) 2012 Elsevier B. V. All rights reserved.