公开(公告)号：US20220319794A1

公开(公告)日：2022-10-06

申请号：US17619686

申请日：2020-06-19

Applicant: HAMAMATSU PHOTONICS K.K. ,  Technical University of Denmark

Inventor： Tetsuya FUJITA ,  Takahiro SUZUKI ,  Yasuhide MIYAZAKI ,  Naoya KAWAI ,  Peter Uhd JEPSEN ,  Simon Lehnskov LANGE

IPC: H01J31/48 ,  H01J29/86

Abstract: An electron tube includes a housing that is internally held in a vacuum and has a window transmitting an electromagnetic wave, an electron emitting unit that is disposed in the housing and has a meta-surface emitting electrons in response to incidence of the electromagnetic wave, an electron multiplying unit that is disposed in the housing and multiplies the electrons emitted from the electron emitting unit, and an electron collecting unit that is disposed in the housing and collects the electrons multiplied by the electron multiplying unit. The window contains at least one selected from quartz, silicon, germanium, sapphire, zinc selenide, zinc sulfide, magnesium fluoride, lithium fluoride, barium fluoride, calcium fluoride, magnesium oxide, and calcium carbonate.

公开(公告)号：US20240363302A1

公开(公告)日：2024-10-31

申请号：US18682305

申请日：2022-08-05

Applicant: HAMAMATSU PHOTONICS K.K. ,  Danmarks Tekniske Universitet

Inventor： Naoya KAWAI ,  Hideaki YOSHIARA ,  Simon Lehnskov LANGE ,  Peter Uhd JEPSEN

IPC: H01J31/26 ,  H01J40/06 ,  H01J40/14

CPC classification number: H01J31/26 ,  H01J40/06 ,  H01J40/14

Abstract: In a photoelectric conversion device, the meta-surface includes a first antenna portion, a first bias portion, a second antenna portion, and a second bias portion. The first antenna portion extends in a first direction and emits an electron in response to incidence of the electromagnetic wave. The first bias portion faces the first antenna portion and is configured to generate an electric field having a component in the first direction between the first bias portion and the first antenna portion. The second antenna portion extends in a second direction intersecting the first direction and emits an electron in response to incidence of the electromagnetic wave. The second bias portion faces the second antenna portion and is configured to generate an electric field having a component in the second direction between the second bias portion and the second antenna portion.

公开(公告)号：US20240355572A1

公开(公告)日：2024-10-24

申请号：US18682276

申请日：2022-08-05

Applicant: HAMAMATSU PHOTONICS K.K. ,  Danmarks Tekniske Universitet

Inventor： Naoya KAWAI ,  Hideaki YOSHIARA ,  Simon Lehnskov LANGE ,  Peter Uhd JEPSEN

IPC: H01J1/34

CPC classification number: H01J1/34 ,  H01J40/06 ,  H01J40/14 ,  H01J40/16

Abstract: A photoelectric conversion device is provided with an electron emitter including a meta-surface emitting an electron in response to incidence of an electromagnetic wave. The meta-surface includes a plurality of photoelectric conversion units having a sensitivity for electromagnetic waves having mutually different wavelength regions. The plurality of photoelectric conversion units respectively include patterns having mutually different configurations.

公开(公告)号：US20240021398A1

公开(公告)日：2024-01-18

申请号：US18025223

申请日：2021-09-28

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Naoya KAWAI ,  Hideaki YOSHIARA ,  Yuya SUZUKI ,  Genki NAKAGOMI

IPC: H01J1/32 ,  H01J43/02 ,  H01J43/28

CPC classification number: H01J1/32 ,  H01J43/02 ,  H01J43/28

Abstract: A metasurface element includes a support body and a metasurface formed on a surface of the support body. The metasurface includes a metal pattern that is disposed to emit an electron in response to incidence of an electromagnetic wave, and a metal layer that contains an alkali metal and is formed on the metal pattern. The metal layer extends beyond the metal pattern to reach a region on the surface of the support body, the region being not formed with the metal pattern.

公开(公告)号：US20240355601A1

公开(公告)日：2024-10-24

申请号：US18682295

申请日：2022-08-05

Applicant: HAMAMATSU PHOTONICS K.K. ,  Danmarks Tekniske Universitet

Inventor： Naoya KAWAI ,  Hideaki YOSHIARA ,  Simon Lehnskov LANGE ,  Peter Uhd JEPSEN

IPC: H01J40/14 ,  G01T1/28 ,  H01J40/06 ,  H01J43/06 ,  H01J43/28 ,  H01J43/30

CPC classification number: H01J40/14 ,  G01T1/28 ,  H01J40/06 ,  H01J43/06 ,  H01J43/28 ,  H01J43/30

Abstract: In a photoelectric conversion device, the potential control unit controls electric potentials applied to the meta-surface. The meta-surface includes a plurality of patterns which are space away from each other. The plurality of patterns include an antenna portion and at least one bias portion. The antenna portion extends in a predetermined direction and emits the electron in response to incidence of the electromagnetic wave. The potential control unit switches a first state and a second state by controlling the electric potentials applied to the plurality of patterns. In the first state, a component of an electric field from the bias portion toward the antenna portion in a predetermined direction is positive. In the second state, a component of an electric field from the bias portion toward the antenna portion in the predetermined direction is negative.

公开(公告)号：US20230071586A1

公开(公告)日：2023-03-09

申请号：US17796738

申请日：2021-02-05

Applicant: HAMAMATSU PHOTONICS K.K. ,  Danmarks Tekniske Universitet

Inventor： Yasuhide MIYAZAKI ,  Yuta KUGE ,  Naoya KAWAI ,  Simon Lehnskov LANGE ,  Peter Uhd JEPSEN

IPC: H01J43/28 ,  H01J43/24

Abstract: In an electron tube, the meta-surface emits an electron in response to an incidence of the electromagnetic wave. The first and second electrodes are spaced away from each other, and apply potentials different from each other to the meta-surface. A holder is disposed in the housing and holds the electron emitter. A first conductive line of the meta-surface is electrically connected to the first electrode. A second conductive line of the meta-surface is spaced away from the first conductive line, and is electrically connected to the second electrode. The first conductive line extends from the first electrode to the second conductive line. The second conductive line extends from the second electrode to the first conductive line.