Nanoparticle optical memory function

摘要

Light and electron-beam induced structural transformations in nano-particles of polymorphic metals provide a paradigm for achieving resonator-less optical memory functionality with picojoule energy requirements. We demonstrate optical memory function with gallium nanoparticles grown by light-assisted self-assembly at the end face of an optical fiber. The memory is written by single optical control pulses, with the state of the bistable nanoparticle film monitored by a continuous wave low intensity reading laser, measuring the reflectivity of the particles.