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Treatment method for improving crystallinity and optical transmittance of mercurous halide single crystal

A treatment method, the technology of mercurous halide single crystal, which is applied in the field of processing to improve the crystallinity and optical transmittance of mercurous halide single crystal, can solve the problem of not being able to solve the darkening characteristics of mercurous halide single crystal or restore the performance of darkened crystals, devices Preparation and application adverse effects, low crystal quality and other problems, to achieve the effect of crystallinity and optical transmittance improvement, optical transmittance recovery, low temperature requirements

Active Publication Date: 2022-07-26
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The half-height width of the rocking curve of the mercury halide series crystal is larger, indicating that the crystal quality is lower
2) Mercury halide crystals have the phenomenon of crystal darkening when exposed to light, which will have an adverse effect on its device preparation and application
However, there is currently no measure that can solve the darkening characteristics of mercury halide or restore the performance of darkened crystals.

Method used

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  • Treatment method for improving crystallinity and optical transmittance of mercurous halide single crystal
  • Treatment method for improving crystallinity and optical transmittance of mercurous halide single crystal
  • Treatment method for improving crystallinity and optical transmittance of mercurous halide single crystal

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The processing method for improving the crystallinity and optical transmittance of the mercurous bromide single crystal is as follows:

[0034] (1) Mercury bromide crystal treatment

[0035] Using SYJ-150 low-speed diamond cutting machine to cut Ф35×40mm 3 The mercurous bromide crystal was cut to obtain 5×5×2mm 3 of mercury bromide wafers. The wafers obtained by dicing were rough-polished with 7000-grit sandpaper to remove the dicing scratches, and then used Al with a particle size of 0.5 μm. 2 O 3 The ethanol suspension of polishing powder is used to finely polish the wafer, and after polishing, the surface of the wafer is rinsed with ethanol.

[0036] (2) Post-annealing treatment

[0037] Place the double-sided polished mercurous bromide wafer in a pretreated high-purity quartz crucible, and wait until the vacuum in the quartz crucible is reduced to 10 -4 After sintering and sealing the quartz crucible below Pa and placing it in a multi-temperature zone vacuum a...

Embodiment 2

[0042] With the processing method described in Example 1, the difference is:

[0043] Replace mercurous bromide single crystals with mercurous chloride crystals.

Embodiment 3

[0045] With the processing method described in Example 1, the difference is:

[0046] Replace the mercurous bromide single crystal with the mercurous iodide crystal.

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Abstract

The invention relates to a treatment method for improving the crystallinity and optical transmittance of a mercurous halide single crystal, which comprises placing the mercurous halide single crystal in a multi-temperature zone vacuum annealing furnace, heating the temperature to 150-180 DEG C for annealing treatment for 90-120 hours ; The mercurous halide single crystal after annealing is slowly lowered to room temperature, the half-peak width of the X-ray rocking curve of the mercurous halide crystal after annealing is obviously reduced, the crystallinity is greatly improved, and the crystal defects are eliminated to a certain extent. , and through annealing post-treatment, the optical transmittance of the submercury halide crystal is restored when it is darkened by light, and the crystal transmittance is significantly improved. In addition, the method has low requirements on temperature, and has the advantages of simplicity, convenience and easy manipulation. Using this method, a mercurous halide crystal with high crystallinity and high optical transmittance can be obtained, which is of great significance for the preparation and application of the mercurous halide crystal acousto-optic device.

Description

technical field [0001] The invention relates to a treatment method for improving the crystallinity and optical transmittance of a mercury halide single crystal, and belongs to the field of crystal defect elimination and device performance improvement. Background technique [0002] Acousto-optic devices are a class of optical components that use ultrasonic waves to control the frequency, direction and amplitude of light beams. It can be mainly divided into acousto-optic modulator, acousto-optic deflector, acousto-optic frequency shifter and acousto-optic tunable filter. The acousto-optic tunable filter that can be used for spectral imaging has a wide range of applications in the fields of military camouflage target reconnaissance, laser remote sensing, aerospace detection and environmental monitoring. It has high diffraction efficiency, fast data acquisition, fast light splitting and compact structure , the advantages of easy integration. Large-scale, high-performance acous...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B33/02C30B29/12
CPCC30B33/02C30B29/12
Inventor 张国栋刘琳李荣臻陶绪堂
Owner SHANDONG UNIV
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