Optical trapping of photochromic microcrystals by a dual fiber tweezers

Upon light irradiation, photochromic materials exhibit drastic changes in absorbance addition to molecular and mechanical changes. In this study, we demonstrated optical trapping of microcrystals a double fiber tweezers system combined with two external lights for photoisomerization observed the force by photoisomerization. situ photoisomerizations single crystal trapped were performed thrice revealing reversible change force. The stiffness colored was one-third that decolorized axial direction, whereas almost no difference transverse direction. Furthermore, based on intermittent motion asymmetry positional distribution crystals, inferred includes transitions through multiple stable sites, ease transition is related isomerization state crystals. Such switching indicates possibility physical properties schemes, nonlinearity also expected be applied advanced computing phenomena.