Nichia Corporation

Motoichi Ohtsu

Takuya Kadowaki

Tadashi Kawazoe

A transmissive polarization control device includes: a semiconductor layer having a first surface and a second surface opposite to the first surface, the semiconductor layer including: a first conductivity type region having a conductivity type, a second conductivity type region having a conductivity type, and a pn junction located between the first and second conductivity type regions; a loop electrode disposed on the first surface and configured such that an electric current flowing through the loop produces a magnetic field in a direction penetrating the pn junction; and a near-field light formation region in which an impurity of the first conductivity type introduced as a dopant into the first conductivity type region for formation of near-field light is distributed. A polarization direction of linearly polarized light traveling through a region surrounded by the loop electrode and the near-field light formation region is rotated according to the electric current.

Transmissive polarization control device, optical isolator, polarization variable light source, and method of manufacturing transmissive polarization control device

Growing community of inventors

Shinagawa-ku, Japan

Motoichi Ohtsu