Abstract
6 G communication technology using terahertz (THz) frequencies has increased the demand for components such as terahertz band filters. A high Q-factor filter capable of transmitting only narrowband frequencies, in particular, has gained significant research attention due to its wide range of applications. Here we obtained an optimal high Q-factor THz filter using an inverse design method that combines a double deep Q-learning model with an analytical solution within eight hours. Further, we confirmed the results of the inverse design using a numerical simulation, experimentally realized the high Q-factor THz filter, and discussed limitations of the spectral resolution of THz spectroscopy.
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