Hamamatsu-photonics K.k.

Akio Ito

Tadataka Edamura

Tatsuo Dougakiuchi

Masahiro Hitaka

Kazuue Fujita

Yoshitaka Kurosaka

Kazuyoshi Hirose

Daisuke Kawaguchi

Atsushi Sugiyama

Light source module

The light-emitting element of an embodiment outputs a clear optical image while suppressing light output efficiency reduction, and includes a substrate, a light-emitting unit, and a bonding layer. The light-emitting unit has a semiconductor stack, including a phase modulation layer, between first and second electrodes. The phase modulation layer has a base layer and modified refractive index regions, and includes a first region having a size including the second electrode, and a second region. Each gravity center of the second region's modified refractive index region is arranged by an array condition. The light from the stack is a single beam, and regarding a first distance from the substrate to the stack's front surface and a second distance from the substrate to the stack's back surface, a variation amount of the first distance along a direction on the substrate is smaller than a variation amount of the second distance.

Light emitting element, method for manufacturing light emitting element, and method for designing phase modulation layer

A sintered body of the present invention includes cerium oxide and cerium fluoride or yttrium fluoride.

Sintered body, sputtering target, film, quantum cascade laser, and method of film formation

Fluid analyzer

An optical semiconductor element includes a semiconductor substrate, a first laminated structure provided on a front surface of the semiconductor substrate, and a second laminated structure provided on the front surface of the semiconductor substrate, the first laminated structure includes a first quantum cascade region, the second laminated structure includes a dummy region having the same layer structure as the first quantum cascade region, a second quantum cascade region provided on the front surface of the semiconductor substrate via the dummy region, and one of the first quantum cascade region and the second quantum cascade region is a quantum cascade laser, and the other of the first quantum cascade region and the second quantum cascade region is a quantum cascade detector.

Optical semiconductor element and method of manufacturing optical semiconductor element

A fluid analyzer includes a substrate, a quantum cascade laser formed on a surface of the substrate and including a first light-emitting surface and a second light-emitting surface facing each other in a predetermined direction parallel to the surface, a quantum cascade detector formed on the surface and including the same layer structure as the quantum cascade laser and a light incident surface facing the second light-emitting surface in the predetermined direction, and an optical element disposed on an optical path of light emitted from the first light-emitting surface across an inspection region in which a fluid to be analyzed is to be disposed and reflecting the light to feed the light back to the first light-emitting surface.

A method of manufacturing a quantum cascade laser beam source () includes: preparing a semiconductor stacked body (); forming a pair of first excavated portions (and) and a ridge portion which is interposed between the pair of first excavated portions (and); forming channel structures (and) and circumferential edge portions (and) which are formed to interpose the channel structures (and) between the ridge portion () and the circumferential edge portion; forming an electrode pattern () in contact with a first area () and forming an electrode pattern () in contact with a second area (); fixing a crystal growth surface side to a support substrate (); removing an Fe-doped (semi-insulating) InP single-crystal substrate (); fixing a Si substrate (); and peeling the support substrate ().

Method of manufacturing quantum cascade laser beam source

A quantum cascade laser is configured with a semiconductor substrate, and an active layer provided on a first surface of the substrate and having a cascade structure in the form of a multistage lamination of unit laminate structures each of which includes an emission layer and an injection layer. The active layer is configured to be capable of generating first pump light of a frequency &#x3c9;and second pump light of a frequency &#x3c9;by intersubband emission transitions of electrons, and to generate output light of a difference frequency &#x3c9; by difference frequency generation from the first pump light and the second pump light. Grooves respectively formed in a direction intersecting with a resonating direction in a laser cavity structure are provided on a second surface opposite to the first surface of the substrate.

Growing community of inventors

Hamamatsu, Japan

Akio Ito