[8a-A409-1~10] 4.3 Nano- and Micro-Photonics

▲ [8a-A409-9] [JSAP-OSA Joint Symposia 2017 Invited Talk] A Challenge to Tunable Metamaterial Optical Retarder: Au Nanograting and its Integration with Microelectromechanical Actuators

〇Kentaro Iwami¹ (1.Tokyo Univ. of Agri. Tech.)

キーワード：metamaterial, retarder, nanofin

An optical retarder based on Au nanograting is studied and applied to a half-waveplate and radial polarization converter working in a visilble wavelength. Furthermore, the grating is integrated with microelectromechanical actuators to achieve reconfigurable characteristics. Both a thermal bimorph actuator and an electrostatic actuator are studied, and the electrostatic type have shown the maximum retardation modulation of 32.4° at the wavelength of 624 nm with an applied voltage of 700 V. This microfabricated structure will open up novel applications for example a small-pixel spatial light modulator (SLM) and future wide viewing-angle electronic holography.