전기장에 의한 유기용액의 비등방 비선형 굴절율

Electric Field Induced Anisotropic Nonlinear Refractive Index of Organic Solution

높은 정전기장이 인가된 유기용액의 분자배향도를 측정하는 수단으로 z-scan방법을 사용하였다. 무게비로 0.5%의 4-dimethylamino-4'-nitrostilbene을 cyclopentanone에 녹인 혼합용액을 시료로 z-scan실험을 수행하였으며 측정된 등방비선형 굴절율 $n_{2}$값은 $1.064{\mu}m$파장에서 $-0.905\times10^{-8}\textrm{cm}^2/MW$였다. 3.45KV/nm 정전기장을 인가한 경우에 측정된 $n_{2}$의 비등방비 값은 1.34였으며 분자배향도계수 $

_2 및

_4$값은 0.092 및 -0.128이였다.

We demonstrate z-scan method as a tool for investigating the molecular orientational order in organic solution when high static electric field is applied. Experiments are performed for the solution of 0.5% (by weight) 4-dimethylamino-4'-nitrostilbene in cyclopentanone and nonlinear refractive index $n_{2}$, is measured to be $-0.905\times10^{-8}\textrm{cm}^2/MW$ at $1.064{\mu}m$. When static electric field of 3.45 KV fmm is applied, the anisotropy ratio of n, is measured to be 1.34 and the molecular orientational order parameters $

_2 and

_4$ are found to be 0.092 and -0.128, respectively. ively.