11:45 AM - 12:15 PM ▲ [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.)