摘要:
A vertical cavity surface emitting laser includes a first semiconductor multilayer reflector, a resonator, and a second semiconductor multilayer reflector. The first semiconductor multilayer reflector is formed on a substrate and is configured by stacking a high refractive index layer having a relatively high refractive index and a low refractive index layer having a relatively low refractive index. The resonator includes an active layer formed on the first semiconductor multilayer reflector. The second semiconductor multilayer reflector is configured by stacking the high refractive index layer and the low refractive index layer. The resonator includes a pair of spacer layers disposed vertically on the active layer and a resonator extension area formed at one side of the pair of spacer layers. The resonator extension area contains a material in which an energy level with a crystal defect is higher than a general energy level without the crystal defect.
摘要:
Provided is a light-emitting element including a semiconductor substrate, an island structure formed on the semiconductor substrate and including at least a current confining layer and p-type and n-type semiconductor layers, a light-emitting thyristor formed in the island structure and having a pnpn structure, and a shift thyristor formed in the island structure and having a pnpn structure, wherein the island structure includes a first side surface having a first depth such that the first side surface does not reach the current confining layer in a formation region of the shift thyristor and a second side surface having a second depth such that the second side surface reaches at least the current confining layer in a formation region of the light-emitting thyristor, and an oxidized region selectively oxidized from the second side surface is formed in the current confining layer in the formation region of the light-emitting thyristor.
摘要:
Disclosed is a light-emitting element including a semiconductor substrate, an island structure formed on the semiconductor substrate and including at least a current confining layer and p-type and n-type semiconductor layers, a light-emitting thyristor formed in the island structure and having a pnpn structure, and a shift thyristor formed in the island structure and having a pnpn structure, wherein a groove portion having a depth such that the groove portion reaches at least the current confining layer is formed between a formation region of the shift thyristor of the island structure and a formation region of the light-emitting thyristor, and an oxidized region that is selectively oxidized from a side surface of the island structure and a side surface of the groove portion is formed in the current confining layer.
摘要:
A vertical cavity surface emitting laser that includes: a substrate; a first semiconductor multilayer reflector; an active region; a second semiconductor multilayer reflector; a columnar structure formed on the substrate; a current narrowing layer that is formed inside of the columnar structure, and has a conductive region surrounded by an oxidization region selectively oxidized; a first electrode that is formed at a top of the columnar structure, and defines a beam window; a first insulating film that covers the beam window; and a second insulating film of which a second refractive index is larger than the first refractive index. A reflection ratio in a second region where the second insulating film is formed is lower than a reflection ratio in a first region where only the first insulating film is formed.
摘要:
A surface-emitting semiconductor laser includes a substrate, a first semiconductor multi-layered reflector of a first conductivity type, an active region, a second semiconductor multi-layered reflector of a second conductivity type, a columnar structure, a current-confining layer including a conductive area surrounded with an oxidized area, a first electrode defining a light-emitting window, a first dielectric film covering the light-emitting window, and a second dielectric film formed on the first dielectric film. The second dielectric film has an asymmetrical shape having a long axis and a short axis, the second dielectric film is located at a position overlapping with the conductive area, the second refractive index n2 is greater than the first refractive index n1, the thickness of the first dielectric film is an odd multiple of λ/4·n1 (λ: oscillation wavelength), and the thickness of the second dielectric film is an odd multiple of λ/4·n2.
摘要:
A surface emitting laser and a surface emitting laser array capable of high-luminance optical output in fundamental transverse mode, which can be produced easily with good reproducibility and with small position variation. The surface emitting laser has an active layer region composed of an active layer and upper and lower spacer layers deposited on both sides thereof and reflection layers deposited on both sides of the active layer region, an upper reflecting layer deposited on the upper spacer layer of the active layer region, a lower reflecting layer deposited on the lower spacer layer of the active layer region, and a secondary cavity formed by a first mode control layer and a second mode control layer placed on the periphery of the region of emission of the laser beam at the upper reflecting layer.
摘要:
A fixing device includes a transport member that transports a recording medium in a first direction, the recording medium having on one side thereof an image formed of an image forming material that is to be fixed by absorbing light; a first chip that has a first light-emitting area in which a plurality of light-emitting elements that emit light toward the one side of the recording medium are arranged two-dimensionally; and a second chip that has a second light-emitting area in which a plurality of light-emitting elements that emit light toward the one side of the recording medium are arranged two-dimensionally. A gap between the first light-emitting area and the second light-emitting area extends at an angle with respect to the first direction, and a portion of the first light-emitting area and a portion of the second light-emitting area overlap each other in the first direction.
摘要:
A vertical cavity surface emitting laser that includes: a substrate; a first reflector of a first conductive type formed on the substrate; an active region formed on the first reflector; a second reflector of a second conductive type formed on the active region; and a current confining layer formed between the first reflector and the second reflector; and a metallic electrode that is formed on the second reflector, and is electrically connected to the second reflector. A conductive region with an anisotropy where a length in a longitudinal direction is different from a length in a short direction is formed in the current confining layer, and an opening defining a beam aperture is formed in the metallic electrode, and a diameter of the opening in the longitudinal direction is smaller than the length of the conductive region in the longitudinal direction.
摘要:
A clutch control device includes: a plurality of hydraulic clutches built into a transmission; a clutch switching pattern storage device in which a plurality of clutch switching patterns, each defining engage/release changeover timing with which the plurality of hydraulic clutches are engaged/released are stored in correspondence to individual speed change patterns adopted by the transmission; a clutch switching pattern selection device that selects a clutch switching pattern stored in the clutch switching pattern storage device in correspondence to a speed change pattern for the transmission at a time of speed change; and a hydraulic control device that executes hydraulic control for the plurality of hydraulic clutches in correspondence to the clutch switching pattern selected by the clutch switching pattern selection device.
摘要:
There is provided a semiconductor laser apparatus. An electrode of a semiconductor laser diode is bonded via a die attach and the electrode of the semiconductor laser diode includes Au and at least one of materials that compose the die attach except Au, in advance.