Nishida, KentaroKentaroNishidaCheng, Hao-YuHao-YuChengPetrov, MihailMihailPetrovChen, Kuo-PingKuo-PingChenTakahara, JunichiJunichiTakaharaLi, XiangpingXiangpingLiLin, Kung-HsuanKung-HsuanLinChu, Shi-WeiShi-WeiChu2025-08-072025-08-072024-09-26https://scholars.lib.ntu.edu.tw/handle/123456789/731122The recent evolution of semiconductor nanodevices, including nanoresonators and metasurfaces, has provided active tunability of optical functionality by efficiently utilizing various mechanisms such as mechanical deformation, carrier concentration modulation, and a tunable liquid crystal medium. Among these ideas, thermally induced nonlinear light–matter interaction holds great potential to realize all-optical control of signal intensity with exceptionally large modulation depth. Here, we review recent innovations on all-optical photothermal control of resonant semiconductor nanophotonics devices by using pulse-excited transient modulation, the thermo-optic effect under continuous wave laser excitation, and chalcogenide phase change materials.[SDGs]SDG7journal article10.1364/JOSAB.531136