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Polarization-state phase-adjustable wide-spectrum reflecting mirror

A wide-spectrum, mirror technology, applied in the field of optical mirrors, can solve the problems of increasing the bit error rate of quantum communication, distortion of quantum encoded photons, and failure of quantum communication.

Active Publication Date: 2014-04-02
SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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  • Abstract
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  • Application Information

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Problems solved by technology

However, when the mirror is used at a certain working angle, the additional polarization sensitivity and phase difference introduced by it will cause the distortion of the quantum encoded photons, resulting in an increase in the bit error rate of quantum communication, and even lead to the failure of quantum communication in severe cases.

Method used

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  • Polarization-state phase-adjustable wide-spectrum reflecting mirror
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  • Polarization-state phase-adjustable wide-spectrum reflecting mirror

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Embodiment Construction

[0027] The present invention will be further described below in conjunction with the accompanying drawings: a single-sided polished quartz plate of Ф30mm×6mm is used as the substrate, silver (Ag) is selected as the metal film layer, and tantalum pentoxide (Ta 2 o 5 ) and silicon dioxide (SiO 2 ) as a high index of refraction (n H ) and low refractive index (n L ) dielectric material, mirror structure as shown figure 1 shown. Its working angle is 45°, the working waveband is 500-1600nm, and the polarization sensitivity and reflection phase modulation waveband is 770-860nm.

[0028] The thickness of the metal silver (Ag) film layer is designed to be about 80nm, which guarantees the reflectivity in the visible infrared band, and at the same time, the film layer has good firmness and reliability.

[0029] Center wavelength tunable all-dielectric reflector design wavelength λ 0 =880nm, its film structure is:

[0030] (HL) 5 h

[0031] The design wavelength of the phase mod...

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Abstract

The invention discloses a polarization-state phase-adjustable wide-spectrum reflecting mirror. Three-dimensional integrated precise regulation and control of spectrum, polarization state and phase of the reflecting mirror is realized through optimal combination of a metal film material and various dielectric film materials. According to the reflecting mirror, high reflectivity in wide spectrum range is realized by the metal film material; enhancement of local spectrum reflectivity of the reflecting mirror and control of polarization sensitivity are realized by a periodic 1 / 4 full dielectric reflective film stack; precise regulation and control of the reflecting phase of the reflecting mirror is realized by multiple layers of irregular dielectric films. The reflecting mirror has the characteristics of wide reflecting spectrum range, precise and adjustable reflecting polarization state and phase, capability of enhancing local spectrum reflectivity and the like.

Description

technical field [0001] The invention relates to an optical mirror, specifically refers to the use of metal and various dielectric thin film materials to design a combined structure of a metal film layer and an all-dielectric film layer to realize the modulation of reflection energy, polarization sensitivity and phase, and is prepared by a vacuum coating process with high efficiency. Broad-spectrum optical reflective elements for energy transfer and precise polarization sensitivity and phase manipulation. Background technique [0002] Quantum communication is a subject that studies the use of quantum means to transmit and process information. Compared with classical communication, quantum communication has many advantages. The use of quantum communication technology can establish an undecipherable key system to achieve truly secure communication. [0003] The application methods of quantum communication include quantum key distribution, quantum teleportation and so on. Amon...

Claims

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Application Information

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IPC IPC(8): G02B5/08G02B1/10
Inventor 段微波李大琪陈刚余德明黄伟庆刘定权
Owner SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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