The development and performance of tetraphenyldiaminobiphenyl‐based polymer composites with stable video‐rate‐compatible response times over large exposures is reported (see Figure). The high diffraction efficiency together with an exposure‐history independence of the response time described is a significant advance for developing an all‐organic photorefractive composite for device applications.
The development of a high-performance photorefractive polymer composite operating at 1550 nm is reported. We show 40% internal diffraction efficiency with response time of 35 ms and a net gain of 20cm−1 in four-wave mixing and two-beam coupling experiments, respectively. This is more than an order of magnitude improvement in the diffraction efficiency and net two beam coupling gain and two orders of magnitude in the response time than the previously reported photorefractive polymer operating at this technologically important wavelength. The improvement in photorefractive characteristics is accomplished by an enhanced orientation of the nonlinear optical chromophore in the present composite.
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