Rapid inverse design of high Q-factor terahertz filters [Invited]

Author:

Lee Hyoung-TaekORCID,Kim Jeonghoon,Park Hyeong-RyeolORCID

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.

Funder

Institute for Information and Communications Technology Promotion

Ulsan National Institute of Science and Technology

National Research Foundation of Korea

Publisher

Optica Publishing Group

Subject

Electronic, Optical and Magnetic Materials

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