Optically Monitored Electrical Switching in VO2

摘要: We demonstrate a hybrid silicon–vanadium dioxide (Si-VO2) electro-optic modulator that enables direct probing of both the electrically triggered semiconductor-to-metal phase transition in VO2 and reverse from metal to semiconductor. By using two-terminal in-plane electrical switch atop single-mode silicon waveguide, change can be initiated probed optically, separating excitation measurement processes simplifying analysis metal-to-semiconductor dynamics. record switch-on time for high-speed transition, with switching times less than 2 ns, quantify slower inverse which is dominated by thermal dissipation relaxation metallic rutile lattice monoclinic semiconducting phase. limiting current through reduce Joule heating, we enable as fast 3 ns.