To provide an evanescent-wave minute resonator laser for generating laser oscillations, using a gain that is present in the evanescent wave in a resonance mode at a minute resonator, where the radius ranges from approximately several tens of microns to several hundreds of microns.
A gain medium 120 such as a semiconductor, atoms, molecules, or quantum dots is arranged outside a resonator 110 where an evanescent wave in a minute resonator mode is present, and a gain substance is excited by current and external visible rays. Fluorescence emitted by the gain substance and the evanescent wave in the resonator mode are combined to obtain a gain, thus amplifying light corresponding to the resonator mode. The amplified light is fed back through a total reflection process in the minute resonator and at the same time induced emission is generated by the gain substance that is excited in the evanescent wave region, thus achieving stable laser oscillation. Especially, all lasers using a minute ball having extremely small loss, and a disk-like or cylindrical minute resonator that can be integrated are included.
MOON HEE JONG
CHOUGH YOUNG-TAK
