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公开(公告)号：US20210240052A1
公开(公告)日：2021-08-05
申请号：US17053130
申请日：2019-05-14
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor： Soh UENOYAMA , Kazuyoshi HIROSE , Yoshitaka KUROSAKA , Hiroshi TANAKA
IPC: G02F1/29
Abstract: A reflective dynamic metasurface of an embodiment comprises a structure enabling phase modulation in each of pixels constituting at least a one-dimensional array. The metasurface includes: a laminated structure body having a transparent conductive layer and a dielectric layer; a first metal film on one surface of the laminated structure body; a second metal film on the other surface of the laminated structure body; and a drive circuit controlling voltage applied between the first and second metal films. The first and second metal films are arranged to sandwich the pixels. The first metal film is arranged to expose a pair of window regions in one pixel, and the second metal film includes partial metal films defining the shape of each pixel and separated from each other. The drive circuit individually controls the potential of each partial metal film, thereby modulating the phase of the input light for each pixel.
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公开(公告)号：US20180074226A1
公开(公告)日：2018-03-15
申请号：US15701537
申请日：2017-09-12
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor： Yoshiro NOMOTO , Yoshitaka KUROSAKA , Kazuyoshi HIROSE , Takahiro SUGIYAMA , Soh UENOYAMA
CPC classification number: G02B1/002 , G02B5/008 , G02B2207/101 , G02F1/19 , G02F2202/30
Abstract: A metasurface includes a substrate including a light input surface into which input light is input and a light output surface facing the light input surface, and a plurality of V-shaped antenna elements disposed on the light output surface of the substrate and including a first arm and a second arm continuing on one end of the first arm. The each of the V-shaped antenna elements has a thickness in a range of 100 nm to 400 nm.
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公开(公告)号：US20170338624A1
公开(公告)日：2017-11-23
申请号：US15538219
申请日：2015-12-24
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor： Yuu TAKIGUCHI , Kazuyoshi HIROSE , Yoshitaka KUROSAKA , Takahiro SUGIYAMA , Yoshiro NOMOTO
CPC classification number: H01S5/0425 , G02F1/13 , H01S3/1065 , H01S5/0228 , H01S5/026 , H01S5/0624 , H01S5/06243 , H01S5/105 , H01S5/12 , H01S5/14 , H01S5/18 , H01S5/18302 , H01S5/18361 , H01S5/34313 , H01S5/34353 , H01S2301/02 , H01S2301/20
Abstract: This semiconductor laser device includes a semiconductor laser chip and a spatial light modulator SLM optically coupled to the semiconductor laser chip. The semiconductor laser chip LDC includes an active layer 4, a pair of cladding layers 2 and 7 sandwiching the active layer 4, a diffraction grating layer 6 optically coupled to the active layer 4, and a drive electrode E3 that is disposed between the cladding layer 2 and the spatial light modulator SLM and supplies an electric current to the active layer 4, and the drive electrode E3 is positioned within an XY plane and has a plurality of openings as viewed from a Z-axis direction and has a non-periodic structure.
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24.发明公开公开(公告)号：US20240364079A1
公开(公告)日：2024-10-31
申请号：US18683035
申请日：2022-05-19
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor： Kazuyoshi HIROSE , Koyo WATANABE , Hiroki KAMEI
CPC classification number: H01S5/18302 , H01S5/0427 , H01S5/06246 , H01S5/18305 , H01S5/222
Abstract: A method for designing a phase modulation layer of a light emitting element as an iPMSEL including a light emitting portion and the phase modulation layer optically coupled to the light emitting portion includes a generation step for generating a design pattern of the phase modulation layer. The phase modulation layer includes a base layer and a plurality of different refractive index regions having different refractive indices from the base layer and distributed two-dimensionally in a plane perpendicular to a thickness direction of the phase modulation layer.
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公开(公告)号：US20220037849A1
公开(公告)日：2022-02-03
申请号：US17414070
申请日：2019-12-11
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor： Akio ITO , Yoshitaka KUROSAKA , Masahiro HITAKA , Kazuyoshi HIROSE , Tadataka EDAMURA
IPC: H01S5/026 , H01S5/042 , H01S5/343 , H01S5/0236 , G06F30/10
Abstract: 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.
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Patent Agency Ranking
公开(公告)号：US20210273411A1
公开(公告)日：2021-09-02
申请号：US17054000
申请日：2019-05-14
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor： Soh UENOYAMA , Kazuyoshi HIROSE , Yoshitaka KUROSAKA , Hiroshi TANAKA
Abstract: The present embodiment relates to a light-emitting device comprising a reflective metasurface modulating a phase for each of pixels constituting a one- or two-dimensional array. The light-emitting device comprises a surface emitting laser element, a light guide layer, and the metasurface. The metasurface has a light transmissive layer including a dielectric layer, one metal film on one surface thereof, and the other metal film on the other surface thereof. In each of unit regions corresponding to the pixels, the light transmissive layer includes a portion exposed without being covered with the metal film. The width of each unit region and the thickness of the light transmissive layer are smaller than the wavelength of the laser light to the metasurface. The metasurface modulates the phase of the laser light for each unit region. A first light output surface outputs the modulated laser.
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公开(公告)号：US20210249841A1
公开(公告)日：2021-08-12
申请号：US16973602
申请日：2019-06-19
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor： Yuta AOKI , Kazuyoshi HIROSE , Satoru OKAWARA
Abstract: A light-emitting device according to an embodiment includes a structure for increasing an optical confinement coefficient of a layer forming a resonance mode. The light-emitting device includes a first cladding layer, an active layer, a second cladding layer, a resonance mode formation layer, and a high refractive index layer. The first cladding layer, the active layer, the second cladding layer, the resonance mode formation layer, and the high refractive index layer mainly contain nitride semiconductors. The high refractive index layer has a refractive index higher than that of any of the first cladding layer, the active layer, the second cladding layer, and the resonance mode formation layer, and has a superlattice structure in which two or more layers having refractive indices different from each other are repeatedly laminated.
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公开(公告)号：US20210226412A1
公开(公告)日：2021-07-22
申请号：US17269313
申请日：2019-08-27
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor： Kazuyoshi HIROSE , Yuu TAKIGUCHI , Takahiro SUGIYAMA , Yoshitaka KUROSAKA
Abstract: The present embodiment relates to a light emission device capable of removing zero-order light from output light of an S-iPM laser. The light emission device comprises an active layer and a phase modulation layer. The phase modulation layer includes a base layer and a plurality of modified refractive index regions. In a state in which a virtual square lattice is set on the phase modulation layer, a center of gravity of each modified refractive index region is separated from a corresponding lattice point, and a rotation angle around each lattice point that decides a position of the center of gravity of each modified refractive index region is set according to a phase distribution for forming an optical image. A lattice spacing and an emission wavelength satisfy a condition of M-point oscillation in a reciprocal lattice space of the phase modulation layer. A magnitude of at least one of in-plane wavenumber vectors in four directions formed in the reciprocal lattice space and each including a wavenumber spread corresponding to an angle spread of the output light is smaller than 2π/λ.
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公开(公告)号：US20200373739A1
公开(公告)日：2020-11-26
申请号：US16769805
申请日：2018-11-28
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor： Kazuyoshi HIROSE , Yoshitaka KUROSAKA , Yuu TAKIGUCHI , Takahiro SUGIYAMA
Abstract: The embodiment relates to a light-emitting device in which a positional relationship between a modified refractive index region's gravity-center position and the associated lattice point differs from a conventional device, and a production method. In this device, a stacked body including a light-emitting portion and a phase modulation layer optically coupled to the light-emitting portion is on a substrate. The phase modulation layer includes a base layer and plural modified refractive index regions in the base layer. Each modified refractive index region's gravity-center position locates on a virtual straight line passing through a corresponding reference lattice point among lattice points of a virtual square lattice on the base layer's design plane. A distance between the reference lattice point and the modified refractive index region's gravity center along the virtual straight line is individually set such that this device outputs light forming an optical image.
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公开(公告)号：US20190312412A1
公开(公告)日：2019-10-10
申请号：US16434789
申请日：2019-06-07
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor： Yoshitaka KUROSAKA , Kazuyoshi HIROSE , Takahiro SUGIYAMA , Yuu TAKIGUCHI , Yoshiro NOMOTO
Abstract: The present embodiment relates to a light emitting device having a structure capable of removing zero order light from output light of an S-iPM laser. The light emitting device includes a semiconductor light emitting element and a light shielding member. The semiconductor light emitting element includes an active layer, a pair of cladding layers, and a phase modulation layer. The phase modulation layer has a basic layer and a plurality of modified refractive index regions, each of which is individually disposed at a specific position. The light shielding member has a function of passing through a specific optical image output along an inclined direction and shielding zero order light output along a normal direction of a light emitting surface.
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