Nichia Corporation

Takuya Kadowaki

Tadashi Kawazoe

Masaki Sugeta

Motoichi Ohtsu

A sensor element includes a first silicon semiconductor portion, a second silicon semiconductor portion, a third silicon semiconductor portion, and a p-n junction. The first silicon semiconductor portion includes a first p-type impurity. The second silicon semiconductor portion is arranged on the first silicon semiconductor portion and includes a second p-type impurity. The third silicon semiconductor portion is arranged on the second silicon semiconductor portion and includes an n-type impurity. The p-n junction is defined between the second silicon semiconductor portion and the third silicon semiconductor portion. The sensor element has light-receiving sensitivity to light having a wavelength longer than a wavelength corresponding to a band gap of silicon.

Sensor element and method for manufacturing sensor element

A light-emitting device includes: at least one light-emitting element comprising a semiconductor layered portion and configured to emit light that has a predetermined wavelength and includes a first polarization component and a second polarization component; and at least one polarized light control member in contact with the at least one light-emitting element. The at least one polarized light control member includes a first structure and a second structure that are positioned in order from a light-emitting element side. The first structure is configured to receive the light having the predetermined wavelength to generate near-field light. The second structure is configured to receive the near-field light and the light having the predetermined wavelength to emit light in which a proportion of the second polarization component is greater than a proportion of the first polarization component.

Light-emitting device including polarized light control member

A light-emitting device includes at least one light-emitting element including a semiconductor layered portion and configured to emit light that has a predetermined wavelength and includes a first polarization component and a second polarization component; and at least one polarized light control member in contact with the at least one light-emitting element. The at least one polarized light control member includes a first structure and a second structure that are positioned in order from the at least one light-emitting element side. The first structure receives the light having the predetermined wavelength to generate near-field light. The second structure receives the near-field light and the light having the predetermined wavelength to emit light in which a proportion of the second polarization component is greater than a proportion of the first polarization component.

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

Yokohama, Japan

Takuya Kadowaki