Measurement of electro‐optic effects in single crystal films of N‐(4‐nitrophenyl)‐L‐prolinol

The electro‐optic properties of single crystal films of N‐(4‐nitrophenyl)‐ L‐prolinol (NPP) were evaluated. The direct coating technique was used to form the electrodes on the surface of the single‐crystal film samples. The ac voltage and lock‐in technique were used to measure the electro‐optic coefficients. The electro‐optic effects for different orientation of electrodes on a single‐crystal film sample were measured. The dependence of the field induced birefringence on the orientation of electric field with respect to the charge transfer axis was evaluated. The results show that for NPP |n3 xr12− n3 yr22|=340 pm/V and r12=65 pm/V. The results are promising for various application in electro‐optics involving appropriate device geometries.