A transient reorientation of liquid crystals in azo-dye-doped liquid crystals (ADDLCs) is observed by the improved attenuated total reflection leading a pump light into a coupling prism, namely, pumped ATR experiment. The evanescent wave of the pump light induces the photoexcitation of azo dye at the limited effective depth, and the evanescent wave of the probe light detects the dynamic behavior in real time. The time response of the photoexcitation in ADDLCs in the pumped ATR experiment is less than 2 ms and it is believed that the reaction occured in the local region of 100 nm.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy (miscellaneous)