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Method for adjusting three-dimensional photonic crystal band gap through lithiation method

A photonic crystal and three-dimensional technology, which is applied in the field of adjusting the band gap of three-dimensional photonic crystals, can solve the problems of narrow adjustment range and low precision, and achieve the effect of large adjustment range, high precision and safe operation method

Active Publication Date: 2016-08-31
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for adjusting the band gap of three-dimensional photonic crystals by using the lithiation method to solve the problems of narrow adjustment range and low precision of the existing methods for adjusting the band gap of three-dimensional photonic crystals

Method used

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  • Method for adjusting three-dimensional photonic crystal band gap through lithiation method
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  • Method for adjusting three-dimensional photonic crystal band gap through lithiation method

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specific Embodiment approach 1

[0014] Specific implementation mode 1: In this implementation mode, the method for adjusting the bandgap of a three-dimensional photonic crystal by the lithiation method is implemented according to the following steps:

[0015] 1. Soak the copper foil in hydrochloric acid solution, then ultrasonically clean it with acetone, methanol and ultrapure water for 5 to 20 minutes to obtain the cleaned copper foil, and then use water as a solvent to configure a volume fraction of 0.1% to 0.3% Put the cleaned copper foil vertically into the PS microsphere emulsion, and incubate at a constant temperature of 50-70°C for 48-120 hours to obtain copper foil with PS colloidal templates;

[0016] Second, the ionic liquid (EMIM) TF 2 N (1-methyl-3-ethylimidazole bistrifluorosulfonic acid amine salt solvent) is put into glove box and carry out secondary distillation, in H 2 O and O 2 Under the condition that the content is less than 1ppm, the GeCl 4 Join (EMIM) TF 2 In N, dissolve and shake ...

specific Embodiment approach 2

[0021] Embodiment 2: This embodiment differs from Embodiment 1 in that in step 1, the copper foil is soaked in a hydrochloric acid solution with a volume concentration of 10% to 30% for 5 to 10 seconds. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0022] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that step three is in H 2 O and O 2 Under the condition that the contents are all less than 1ppm, germanium is electrodeposited in the electrolytic solution obtained in step 2 by a constant potential method. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

The invention discloses a method for adjusting a three-dimensional photonic crystal band gap through a lithiation method. The method for adjusting the three-dimensional photonic crystal band gap through the lithiation method aims at solving the problems that an existing method for adjusting the three-dimensional photonic crystal band gap is narrow in adjusting range and low in precision. The method for adjusting the photonic crystal band gap includes the steps that copper foil is perpendicularly put into PS microsphere emulsion to be cultivated, and copper foil on which a PS colloid template grows is obtained; secondly, GeC14 is added to (EMIM)TF2N, and an electrolyte is obtained; thirdly, a three-electrode electrolytic cell is used, a potentiostatic method is used for electrodeposition of germanium, and a three-dimensional germanium film is obtained; and fourthly, the lithium embedding and lithium removing processes are conducted in a three-electrode system, and therefore the three-dimensional photonic crystal band gap is adjusted. By means of the method, the direction of voltage is controlled so that the germanium film with the three-dimensional photonic crystal structure is correspondingly subjected to the lithium embedding and removing processes, and due to the fact that volume expansion of Ge is large, the adjusting range of the method is very large.

Description

technical field [0001] The invention relates to a method for adjusting the band gap of a three-dimensional photonic crystal. Background technique [0002] The concept of photonic crystal was first proposed by Yablonovitch and John. It is an artificial microstructure formed by periodic arrangement of media with different refractive indices, and has a photonic energy gap. When the frequency of the light is within the photonic bandgap range, the light will be forbidden from propagating. Due to the existence of the photonic band gap, photonic crystals have many new physical properties and become a research hotspot in the world today. [0003] There are two factors affecting the photonic band gap: the dielectric constant ratio or refractive index ratio of the dielectric material and the structure of the photonic crystal. Therefore, changing the photonic band gap is generally considered from two aspects: one is to change the refractive index for modulation, and the other is to c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D5/02C25D3/54C30B29/08C30B30/02
CPCC25D3/54C25D5/022C30B29/08C30B30/02
Inventor 赵九蓬曲慧颖李垚刘旭松迟彩霞
Owner HARBIN INST OF TECH
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