Abstract
Today, a lot of attention is paid to remote controlled opto-electronic devices. Many of them are commonly used in the society, industry, and science. Accessories dedicated to the particular utilization are desired. The point is to find a simple way to obtain smart and functional appliances. Materials engineering faces such problems and provides a variety of solutions concerning advanced material design, preparation, and utilization. Photochromic materials represent one of the already known materials, which still find other objectives in new fields of life. In our work, we present two differently constructed photoresponsive polymers, which give significantly different nonlinear optical (NLO) response visible as noticeable optical signal modulation. By playing with diversified laser light energy or its frequency, NLO output characterized appealing, and individual characteristics (doubled Δn ∼0.02 vs 0.04 and entirely different kinetics for two similar materials and the same laser pumping). Interestingly, high output signal repeatability and stability were achieved, which indicate the investigated materials as promising candidates in the construction of various opto-electronic devices. Additionally, a set of photoresponsive studies, reflectometry, and theoretical insights was performed and included in this work.
Highlights
Plenty of research groups are focused on organic, multifunctional, smart materials
We have presented two photosensitive polymeric systems, which differ in their chemical construction
Slight structural changes introduced to their optically passive moieties resulted in significantly different and appealing nonlinear optical (NLO) output, modulation, and signal stability. Starting from their synthesis method as well as transfer from the solid state toward the thin film shape, photochromic polymers were easy in fabrication and further manipulations
Summary
Plenty of research groups are focused on organic, multifunctional, smart materials. Few variants of the Kerr effect are known: the Kerr (quadratic electro-optic; QEO) effect, optical Kerr effect (OKE is known as optical-optic or all-optical or AC Kerr effect), and magneto-optic Kerr effect.[7] If considering the OKE phenomenon, the electric field (energy) is provided to the illuminated medium from the electromagnetic wave (light). Such approach uses the fastest energy/information carrier and fulfills all theoretical basics related to the energy transfer, intermolecular interaction, and influence. Only one light (laser) source is enough to manipulate an isotropic material and convert it to an efficient NLO medium; for the needs and clarity of the experiment, the second laser line is utilized to monitor the whole process.[7]
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