Patent
US 9,846,317OPTICAL MODULATOR, IMAGING DEVICE AND DISPLAY APPARATUS INCLUDING A DIELECTRIC LAYER AND AN ELECTRODE COMPRISING GRAPHENE
Koji Kadono
US
Copyright © 2026 Matter42. All rights reserved.
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
(cu rr ently amended): An optical modulator comprising: a first electrode; a second electrode; a dielectric layer provided between the first and second electrodes; and a junction, wherein at least one of the first electrode and the second electrode comprises at least one layer of graphene, and a dopant layer is formed on the at least one layer of graphene, wherein the junction includes the at least one layer of graphene and the dielectric layer, wherein an amount of charge accumulated in the at least one layer of graphene is controlled by applying voltage to the junction to control transmitted light intensity, and wherein the optical modulator is configured to control an intensity of light which is incident on the first electrode, then is transmitted through the dielectric layer, and then exits through the second electrode, and wherein the optical modulator is configured to perform optical modulation in a wavelength region equal to or less than 1 Etm by accumulating a charge of greater than or equal to 1 microcoulomb/cm 2 on the at least one layer of graphene by voltage application.
The optical modulator according to claim 1, wherein at least one of the first electrode and the second electrode comprises a plurality of graphene layers.
The optical modulator according to claim 1, wherein each of the first electrode and the second electrode comprises at least one layer of graphene.
The optical modulator according to claim 1, wherein the dielectric layer comprises a dielectric substance having a relative permittivity of greater than or equal to 2.0.
The optical modulator according to claim 1, wherein the dielectric layer comprises a fe rr oelectric substance having spontaneous polarization.
The optical modulator according to claim 1, wherein at least one of metal nanoparticles and metal nanowires are provided on the at least one layer of graphene.
The optical modulator according to claim 1, wherein the dielectric layer comprises a substance selected from the group consisting of: Si O 2, A₁ 2 0 3, hexagonal boron nitride, Hf O 2, Zr O 2, ZnO, Ti O 2, indium gallium-doped zinc oxide, SiN, GaN, strontium titanate, barium titanate, lead zirconate titanate, lead titanate, lead lanthanum zirconate titanate, CaF 2, polyvinylidene fluoride, amorphous fluororesin, an ionic liquid and a liquid crystal.
The optical modulator according to claim 1, wherein the first electrode and the second electrode are provided on a substrate made of a material transparent to light in a wavelength region that performs optical modulation.
The optical modulator according to claim 1, wherein the junction includes the first electrode, the dielectric layer and the second electrode, and a total thickness of the junction is set such that light having a wavelength that performs optical modulation is reflected inside the junction in a multiple manner.
The optical modulator according to claim 1, wherein an optical adjustment layer is provided between the dielectric layer and the at least one layer of graphene.
The optical modulator according to claim 1, wherein the dielectric layer comprises a dielectric substance that is transparent to light in a wavelength region which performs optical modulation.
canceled
canceled
The device according to claim 13, wherein the light receiving unit includes a plurality of optical modulators, and wherein each of the plurality of optical modulators is serially connected to another one of the plurality of optical modulators through a shared dielectric layer.
The device according to claim 13, wherein the light receiving unit includes a plurality of optical modulators, wherein each of the plurality of optical modulators is serially connected to another one of the plurality of optical modulators, and wherein for each of the plurality of optical modulators, at least one of the first electrode and the second electrode is shared with an adjacent one of the plurality of optical modulators.
The display apparatus according to claim 16, wherein the light emitting unit includes a plurality of optical modulators, and wherein each of the plurality of optical modulators is serially connected to another one of the plurality of optical modulators through a shared dielectric layer.
The display apparatus according to claim 16, wherein the light emitting unit includes a plurality of optical modulators, wherein each of the plurality of optical modulators is serially connected to another one of the plurality of optical modulators, and wherein for each of the plurality of optical modulators, at least one of the first electrode and the second electrode is shared with an adjacent one of the plurality of optical modulators.
6- canceled
Layer stacks claimed or described, ordered top of device to substrate.
optical modulator
light receiving device with plurality of optical modulators
No layer stack recorded.
display apparatus with plurality of optical modulators
No layer stack recorded.
Materials described outside the worked examples.
graphene
dielectric layer
ferroelectric substance
metal nanoparticles and/or metal nanowires
silicon dioxide
SiO₂
aluminium oxide
Al₂O₃
hexagonal boron nitride
h-BN
hafnium dioxide
HfO₂
zirconium dioxide
ZrO₂
zinc oxide
ZnO
titanium dioxide
TiO₂
indium gallium-doped zinc oxide
silicon nitride
SiN
gallium nitride
GaN
strontium titanate
SrTiO₃
barium titanate
BaTiO₃
lead zirconate titanate
PZT
lead titanate
PbTiO₃
lead lanthanum zirconate titanate
PLZT
calcium fluoride
CaF₂
polyvinylidene fluoride
PVDF
amorphous fluororesin
ionic liquid
liquid crystal
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
(cu rr ently amended): An optical modulator comprising: a first electrode; a second electrode; a dielectric layer provided between the first and second electrodes; and a junction, wherein at least one of the first electrode and the second electrode comprises at least one layer of graphene, and a dopant layer is formed on the at least one layer of graphene, wherein the junction includes the at least one layer of graphene and the dielectric layer, wherein an amount of charge accumulated in the at least one layer of graphene is controlled by applying voltage to the junction to control transmitted light intensity, and wherein the optical modulator is configured to control an intensity of light which is incident on the first electrode, then is transmitted through the dielectric layer, and then exits through the second electrode, and wherein the optical modulator is configured to perform optical modulation in a wavelength region equal to or less than 1 Etm by accumulating a charge of greater than or equal to 1 microcoulomb/cm 2 on the at least one layer of graphene by voltage application.
The optical modulator according to claim 1, wherein at least one of the first electrode and the second electrode comprises a plurality of graphene layers.
The optical modulator according to claim 1, wherein each of the first electrode and the second electrode comprises at least one layer of graphene.
The optical modulator according to claim 1, wherein the dielectric layer comprises a dielectric substance having a relative permittivity of greater than or equal to 2.0.
The optical modulator according to claim 1, wherein the dielectric layer comprises a fe rr oelectric substance having spontaneous polarization.
The optical modulator according to claim 1, wherein at least one of metal nanoparticles and metal nanowires are provided on the at least one layer of graphene.
The optical modulator according to claim 1, wherein the dielectric layer comprises a substance selected from the group consisting of: Si O 2, A₁ 2 0 3, hexagonal boron nitride, Hf O 2, Zr O 2, ZnO, Ti O 2, indium gallium-doped zinc oxide, SiN, GaN, strontium titanate, barium titanate, lead zirconate titanate, lead titanate, lead lanthanum zirconate titanate, CaF 2, polyvinylidene fluoride, amorphous fluororesin, an ionic liquid and a liquid crystal.
The optical modulator according to claim 1, wherein the first electrode and the second electrode are provided on a substrate made of a material transparent to light in a wavelength region that performs optical modulation.
The optical modulator according to claim 1, wherein the junction includes the first electrode, the dielectric layer and the second electrode, and a total thickness of the junction is set such that light having a wavelength that performs optical modulation is reflected inside the junction in a multiple manner.
The optical modulator according to claim 1, wherein an optical adjustment layer is provided between the dielectric layer and the at least one layer of graphene.
The optical modulator according to claim 1, wherein the dielectric layer comprises a dielectric substance that is transparent to light in a wavelength region which performs optical modulation.
canceled
canceled
The device according to claim 13, wherein the light receiving unit includes a plurality of optical modulators, and wherein each of the plurality of optical modulators is serially connected to another one of the plurality of optical modulators through a shared dielectric layer.
The device according to claim 13, wherein the light receiving unit includes a plurality of optical modulators, wherein each of the plurality of optical modulators is serially connected to another one of the plurality of optical modulators, and wherein for each of the plurality of optical modulators, at least one of the first electrode and the second electrode is shared with an adjacent one of the plurality of optical modulators.
The display apparatus according to claim 16, wherein the light emitting unit includes a plurality of optical modulators, and wherein each of the plurality of optical modulators is serially connected to another one of the plurality of optical modulators through a shared dielectric layer.
The display apparatus according to claim 16, wherein the light emitting unit includes a plurality of optical modulators, wherein each of the plurality of optical modulators is serially connected to another one of the plurality of optical modulators, and wherein for each of the plurality of optical modulators, at least one of the first electrode and the second electrode is shared with an adjacent one of the plurality of optical modulators.
6- canceled
Layer stacks claimed or described, ordered top of device to substrate.
optical modulator
light receiving device with plurality of optical modulators
No layer stack recorded.
display apparatus with plurality of optical modulators
No layer stack recorded.
Materials described outside the worked examples.
graphene
dielectric layer
ferroelectric substance
metal nanoparticles and/or metal nanowires
silicon dioxide
SiO₂
aluminium oxide
Al₂O₃
hexagonal boron nitride
h-BN
hafnium dioxide
HfO₂
zirconium dioxide
ZrO₂
zinc oxide
ZnO
titanium dioxide
TiO₂
indium gallium-doped zinc oxide
silicon nitride
SiN
gallium nitride
GaN
strontium titanate
SrTiO₃
barium titanate
BaTiO₃
lead zirconate titanate
PZT
lead titanate
PbTiO₃
lead lanthanum zirconate titanate
PLZT
calcium fluoride
CaF₂
polyvinylidene fluoride
PVDF
amorphous fluororesin
ionic liquid
liquid crystal
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
(cu rr ently amended): An optical modulator comprising: a first electrode; a second electrode; a dielectric layer provided between the first and second electrodes; and a junction, wherein at least one of the first electrode and the second electrode comprises at least one layer of graphene, and a dopant layer is formed on the at least one layer of graphene, wherein the junction includes the at least one layer of graphene and the dielectric layer, wherein an amount of charge accumulated in the at least one layer of graphene is controlled by applying voltage to the junction to control transmitted light intensity, and wherein the optical modulator is configured to control an intensity of light which is incident on the first electrode, then is transmitted through the dielectric layer, and then exits through the second electrode, and wherein the optical modulator is configured to perform optical modulation in a wavelength region equal to or less than 1 Etm by accumulating a charge of greater than or equal to 1 microcoulomb/cm 2 on the at least one layer of graphene by voltage application.
The optical modulator according to claim 1, wherein at least one of the first electrode and the second electrode comprises a plurality of graphene layers.
The optical modulator according to claim 1, wherein each of the first electrode and the second electrode comprises at least one layer of graphene.
The optical modulator according to claim 1, wherein the dielectric layer comprises a dielectric substance having a relative permittivity of greater than or equal to 2.0.
The optical modulator according to claim 1, wherein the dielectric layer comprises a fe rr oelectric substance having spontaneous polarization.
The optical modulator according to claim 1, wherein at least one of metal nanoparticles and metal nanowires are provided on the at least one layer of graphene.
The optical modulator according to claim 1, wherein the dielectric layer comprises a substance selected from the group consisting of: Si O 2, A₁ 2 0 3, hexagonal boron nitride, Hf O 2, Zr O 2, ZnO, Ti O 2, indium gallium-doped zinc oxide, SiN, GaN, strontium titanate, barium titanate, lead zirconate titanate, lead titanate, lead lanthanum zirconate titanate, CaF 2, polyvinylidene fluoride, amorphous fluororesin, an ionic liquid and a liquid crystal.
The optical modulator according to claim 1, wherein the first electrode and the second electrode are provided on a substrate made of a material transparent to light in a wavelength region that performs optical modulation.
The optical modulator according to claim 1, wherein the junction includes the first electrode, the dielectric layer and the second electrode, and a total thickness of the junction is set such that light having a wavelength that performs optical modulation is reflected inside the junction in a multiple manner.
The optical modulator according to claim 1, wherein an optical adjustment layer is provided between the dielectric layer and the at least one layer of graphene.
The optical modulator according to claim 1, wherein the dielectric layer comprises a dielectric substance that is transparent to light in a wavelength region which performs optical modulation.
canceled
canceled
The device according to claim 13, wherein the light receiving unit includes a plurality of optical modulators, and wherein each of the plurality of optical modulators is serially connected to another one of the plurality of optical modulators through a shared dielectric layer.
The device according to claim 13, wherein the light receiving unit includes a plurality of optical modulators, wherein each of the plurality of optical modulators is serially connected to another one of the plurality of optical modulators, and wherein for each of the plurality of optical modulators, at least one of the first electrode and the second electrode is shared with an adjacent one of the plurality of optical modulators.
The display apparatus according to claim 16, wherein the light emitting unit includes a plurality of optical modulators, and wherein each of the plurality of optical modulators is serially connected to another one of the plurality of optical modulators through a shared dielectric layer.
The display apparatus according to claim 16, wherein the light emitting unit includes a plurality of optical modulators, wherein each of the plurality of optical modulators is serially connected to another one of the plurality of optical modulators, and wherein for each of the plurality of optical modulators, at least one of the first electrode and the second electrode is shared with an adjacent one of the plurality of optical modulators.
6- canceled
Layer stacks claimed or described, ordered top of device to substrate.
optical modulator
light receiving device with plurality of optical modulators
No layer stack recorded.
display apparatus with plurality of optical modulators
No layer stack recorded.
Materials described outside the worked examples.
graphene
dielectric layer
ferroelectric substance
metal nanoparticles and/or metal nanowires
silicon dioxide
SiO₂
aluminium oxide
Al₂O₃
hexagonal boron nitride
h-BN
hafnium dioxide
HfO₂
zirconium dioxide
ZrO₂
zinc oxide
ZnO
titanium dioxide
TiO₂
indium gallium-doped zinc oxide
silicon nitride
SiN
gallium nitride
GaN
strontium titanate
SrTiO₃
barium titanate
BaTiO₃
lead zirconate titanate
PZT
lead titanate
PbTiO₃
lead lanthanum zirconate titanate
PLZT
calcium fluoride
CaF₂
polyvinylidene fluoride
PVDF
amorphous fluororesin
ionic liquid
liquid crystal
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
(cu rr ently amended): An optical modulator comprising: a first electrode; a second electrode; a dielectric layer provided between the first and second electrodes; and a junction, wherein at least one of the first electrode and the second electrode comprises at least one layer of graphene, and a dopant layer is formed on the at least one layer of graphene, wherein the junction includes the at least one layer of graphene and the dielectric layer, wherein an amount of charge accumulated in the at least one layer of graphene is controlled by applying voltage to the junction to control transmitted light intensity, and wherein the optical modulator is configured to control an intensity of light which is incident on the first electrode, then is transmitted through the dielectric layer, and then exits through the second electrode, and wherein the optical modulator is configured to perform optical modulation in a wavelength region equal to or less than 1 Etm by accumulating a charge of greater than or equal to 1 microcoulomb/cm 2 on the at least one layer of graphene by voltage application.
The optical modulator according to claim 1, wherein at least one of the first electrode and the second electrode comprises a plurality of graphene layers.
The optical modulator according to claim 1, wherein each of the first electrode and the second electrode comprises at least one layer of graphene.
The optical modulator according to claim 1, wherein the dielectric layer comprises a dielectric substance having a relative permittivity of greater than or equal to 2.0.
The optical modulator according to claim 1, wherein the dielectric layer comprises a fe rr oelectric substance having spontaneous polarization.
The optical modulator according to claim 1, wherein at least one of metal nanoparticles and metal nanowires are provided on the at least one layer of graphene.
The optical modulator according to claim 1, wherein the dielectric layer comprises a substance selected from the group consisting of: Si O 2, A₁ 2 0 3, hexagonal boron nitride, Hf O 2, Zr O 2, ZnO, Ti O 2, indium gallium-doped zinc oxide, SiN, GaN, strontium titanate, barium titanate, lead zirconate titanate, lead titanate, lead lanthanum zirconate titanate, CaF 2, polyvinylidene fluoride, amorphous fluororesin, an ionic liquid and a liquid crystal.
The optical modulator according to claim 1, wherein the first electrode and the second electrode are provided on a substrate made of a material transparent to light in a wavelength region that performs optical modulation.
The optical modulator according to claim 1, wherein the junction includes the first electrode, the dielectric layer and the second electrode, and a total thickness of the junction is set such that light having a wavelength that performs optical modulation is reflected inside the junction in a multiple manner.
The optical modulator according to claim 1, wherein an optical adjustment layer is provided between the dielectric layer and the at least one layer of graphene.
The optical modulator according to claim 1, wherein the dielectric layer comprises a dielectric substance that is transparent to light in a wavelength region which performs optical modulation.
canceled
canceled
The device according to claim 13, wherein the light receiving unit includes a plurality of optical modulators, and wherein each of the plurality of optical modulators is serially connected to another one of the plurality of optical modulators through a shared dielectric layer.
The device according to claim 13, wherein the light receiving unit includes a plurality of optical modulators, wherein each of the plurality of optical modulators is serially connected to another one of the plurality of optical modulators, and wherein for each of the plurality of optical modulators, at least one of the first electrode and the second electrode is shared with an adjacent one of the plurality of optical modulators.
The display apparatus according to claim 16, wherein the light emitting unit includes a plurality of optical modulators, and wherein each of the plurality of optical modulators is serially connected to another one of the plurality of optical modulators through a shared dielectric layer.
The display apparatus according to claim 16, wherein the light emitting unit includes a plurality of optical modulators, wherein each of the plurality of optical modulators is serially connected to another one of the plurality of optical modulators, and wherein for each of the plurality of optical modulators, at least one of the first electrode and the second electrode is shared with an adjacent one of the plurality of optical modulators.
6- canceled
Layer stacks claimed or described, ordered top of device to substrate.
optical modulator
light receiving device with plurality of optical modulators
No layer stack recorded.
display apparatus with plurality of optical modulators
No layer stack recorded.
Materials described outside the worked examples.
graphene
dielectric layer
ferroelectric substance
metal nanoparticles and/or metal nanowires
silicon dioxide
SiO₂
aluminium oxide
Al₂O₃
hexagonal boron nitride
h-BN
hafnium dioxide
HfO₂
zirconium dioxide
ZrO₂
zinc oxide
ZnO
titanium dioxide
TiO₂
indium gallium-doped zinc oxide
silicon nitride
SiN
gallium nitride
GaN
strontium titanate
SrTiO₃
barium titanate
BaTiO₃
lead zirconate titanate
PZT
lead titanate
PbTiO₃
lead lanthanum zirconate titanate
PLZT
calcium fluoride
CaF₂
polyvinylidene fluoride
PVDF
amorphous fluororesin
ionic liquid
liquid crystal