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Figure 10. Flexible optical stimulation devices. (A) Schematic diagram of HM and BM flexible wireless devices, which are used for optogenetic research on unrestrained animals and have dynamically programmable operations^[94]. Reprinted with permission. Copyright 2021, Springer Nature; (B) Schematic diagram of the Opto-Array array design^[95]. Reprinted with permission. Copyright 2021, Springer Nature; (C) Infrared light stimulation flexible device - MINDS for penetrative neural regulation under NIR-II. MINDS is composed of a pBBTV conjugated copolymer core (red hexagons) and a PLGA-PEG polymer shell (green spirals)^[97]. Reprinted with permission. Copyright 2022, Springer Nature. BM: Back-mounted; HM: head-mounted; MINDS: macromolecular infrared nanotransducers; NIR-II: near-infrared pulsed light; pBBTV: poly(benzobisthiadiazole-alt-vinylene); PDMS: polydimethylsiloxane; PLGA-PEG: poly(lactic-co-glycolic acid)-polyethylene glycol; TRPV1: transient receptor potential cation channel subfamily V member 1.