Photonic Crystals Logic Devices
US-2017357143-A1 · Dec 14, 2017 · US
Cavity and quantum computer
US9910340B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9910340-B2 |
| Application number | US-201715442939-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 27, 2017 |
| Priority date | Jun 30, 2016 |
| Publication date | Mar 6, 2018 |
| Grant date | Mar 6, 2018 |
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Abstract
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According to one embodiment, a cavity with a cavity mode which is coupled to physical systems includes a spherical mirror and a plane mirror. The spherical mirror is provided at a birefringent crystal including the physical systems. The plane mirror is provided at the birefringent crystal opposite to the spherical mirror. The birefringent crystal has a first refractive index to light polarized in a first direction parallel to a polarization direction of the cavity mode on an optical axis of the cavity and a second refractive index to light polarized in a second direction parallel to the optical axis, the second refractive index being different from the first refractive index. A cavity length of the cavity and a mode waist radius of the cavity mode satisfy a specific condition.
First claim
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What is claimed is: 1. A cavity with a cavity mode which is coupled to physical systems, the cavity comprising: a spherical mirror provided at a birefringent crystal including the physical systems; and a plane mirror provided at the birefringent crystal and opposed to the spherical mirror, wherein the birefringent crystal has a first refractive index to light polarized in a first direction parallel to a polarization direction of the cavity mode on an optical axis of the cavity and a second refractive index to light polarized in a second direction parallel to the optical axis, the second refractive index being different from the first refractive index, and a following expression is satisfied: l 1− <l<l 1+ where l − and l 1+ satisfy and l 1 - 3 - ( 3 l R 5 l 0 2 + l R 2 - 3 l R 2 ) l 1 - - 3 l R 4 A 2 ω 2 = 0 and l 1 + 3 - ( 3 l R 5 l 0 2 + l R 2 - 3 l R 2 ) l 1 + - 3 l R 4 A 2 ω 2 = 0 in which l R =ω 2 πn z /λ and l 0 =l R L/A, l is a cavity length of the cavity, ω is a mode waist radius of the cavity mode, L is a total loss per one reciprocation in the cavity, A is a loss per one reciprocation in the cavity not dependent on the cavity length, n z is the second refractive index, and λ is a wavelength of light in the cavity mode. 2. The cavity according to claim 1 , wherein l A L = ω 2 π n z λ . 3. A cavity with a cavity mode which is coupled to physical systems, the cavity comprising: a spherical mirror provided at a birefringent crystal including the physical systems; and a plane mirror provided at the birefringent crystal and opposed to the spherical mirror, wherein the birefringent crystal has a first refractive index to light polarized in a first direction parallel to a polarization direction of the cavity mode on an optical axis of the cavity and a second refractive index to light polarized in a second direction parallel to the optical axis, the second refractive index being different from the first refractive index, and a following expression is satisfied:
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Classifications
Systems comprising a plurality of reflections between two or more surfaces, e.g. cells, resonators (multipass arrangements for optical cuvettes G01N21/031; laser resonators H01S3/05) · CPC title
Birefringent or phase retarding elements (G02B5/3008, G02B5/3016 take precedence; systems for polarisation control G02B27/286; manufacturing phase modulating patterns by lithographic processes G03F7/001) · CPC title
Spintronics or quantum computing · CPC title
- G02F3/00Primary
Optical logic elements; Optical bistable devices · CPC title
Nanotechnology for information processing, storage or transmission, e.g. quantum computing or single electron logic · CPC title
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- What does patent US9910340B2 cover?
- According to one embodiment, a cavity with a cavity mode which is coupled to physical systems includes a spherical mirror and a plane mirror. The spherical mirror is provided at a birefringent crystal including the physical systems. The plane mirror is provided at the birefringent crystal opposite to the spherical mirror. The birefringent crystal has a first refractive index to light polarized …
- Who is the assignee on this patent?
- Toshiba Kk
- What technology area does this patent fall under?
- Primary CPC classification G02F3/00. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Mar 06 2018 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).