Unlock instant, AI-driven research and patent intelligence for your innovation.

Spectroscope based on photonic crystal sandwich structure and preparation method thereof

A technology of photonic crystal and beam splitter, which is applied in the field of up-conversion and photonic crystal light emission, can solve the problems of only being reflected and light cannot be transmitted, and achieve the effect of great practicability

Active Publication Date: 2018-11-13
DALIAN UNIV OF TECH
View PDF3 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existence of the photonic band gap makes the light whose frequency is inside the forbidden band unable to propagate in the photonic crystal and can only be reflected

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Spectroscope based on photonic crystal sandwich structure and preparation method thereof
  • Spectroscope based on photonic crystal sandwich structure and preparation method thereof
  • Spectroscope based on photonic crystal sandwich structure and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] NaYF based on CdS photonic crystal "sandwich" structure 4 :Yb 3+ / Er 3+The preparation process of the spectroscope, the specific preparation method is as follows:

[0029] 1. Preparation of Matrix Materials

[0030] Take a clean glass slide with a size of 1.2cm*1.5cm, use the method of spin coating to mix the PDMS prepolymer and curing agent at a mass ratio of 10:1 and then spin coat it on one side of the slide, set the homogenizer to The speed is 6000rmp, and the time is 40s. Transfer it to a heating plate, set the temperature at 80° C., and cure for 2 hours.

[0031] 2. Preparation of CdS dispersion

[0032] Weigh 0.2 g of CdS microspheres with particle diameters of 190 nm and 245 nm, respectively, and prepare an aqueous dispersion with a mass fraction of 20 wt %, and sonicate for 30 min. The field emission scanning electron microscope images of 190nm and 245nm CdS microspheres are shown in figure 1 shown. It can be seen from the figure that the monodispersity...

Embodiment 2

[0037] NaGdF based on CdS photonic crystal "sandwich" structure 4 :Yb 3+ / Er 3+ The preparation process of the spectroscope, the specific preparation method is as follows:

[0038] 1. Preparation of Matrix Materials

[0039] Take a clean glass slide with a size of 1.2cm*1.5cm, use the method of spin coating to mix the PDMS prepolymer and curing agent at a mass ratio of 10:1 and then spin coat it on one side of the slide, set the homogenizer to The speed is 8000rmp, and the time is 30s. Transfer it to a heating plate, set the temperature at 100° C., and cure for 1.5 h.

[0040] 2. Preparation of CdS dispersion

[0041] Weigh 0.3 g of CdS microspheres with particle diameters of 190 nm and 245 nm, respectively, and prepare an aqueous dispersion with a mass fraction of 25 wt %, and sonicate for 30 min.

[0042] 3. CdS photonic crystal "sandwich" structure NaGdF 4 :Yb 3+ / Er 3+ Spectroscopic preparation

[0043] Set the speed of the homogenizer at 900rpm and the time for ...

Embodiment 3

[0046] NaYF based on CdS photonic crystal "sandwich" structure 4 :Yb 3+ / Ho 3+ The preparation process of the spectroscope, the specific preparation method is as follows:

[0047] 1. Preparation of Matrix Materials

[0048] Take a clean glass slide with a size of 1.2cm*1.5cm, and use the spin coating method to spin coat the PVA aqueous solution on one side of the slide, and set the speed of the homogenizer to 1000rmp for 50s. Transfer it to a heating plate, set the temperature at 50° C., and cure for 3 hours.

[0049] 2. Preparation of CdS dispersion

[0050] 0.1 g of CdS microspheres with particle diameters of 195 nm and 240 nm were weighed to form an ethanol dispersion with a mass fraction of 5 wt%, and ultrasonicated for 30 min.

[0051] 3. CdS photonic crystal "sandwich" structure NaYF 4 :Yb 3+ / Ho 3+ Spectroscopic preparation

[0052] Set the speed of the homogenizer at 600rpm and the time for 20s, take 100μL of the up-converted dispersion (concentration about 1m...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Particle sizeaaaaaaaaaa
Section thicknessaaaaaaaaaa
Particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a preparation method of a spectroscope based on a photonic crystal sandwich structure. The preparation method of a spectroscope based on a photonic crystal sandwich structure utilizes a photonic band gap in a two-layer photonic crystal structure to regulate luminescence of rare earth doped upconverted nanoparticles. In the sandwich structure, each layer of photonic crystalstructure acts as an optical filter, and can filter out the upconverted emission light with specific wavelength, and at the same time, each layer of photonic crystal can also enhance the emitted lightwith the other specific wavelength. And finally, pure color output can be obtained from two sides of the sandwich structure and the upconverted emitted light with enhanced intensity. Therefore, a spectroscope structure of the upconverted emitted light is formed, and separated and amplified pure color emitted light can be obtained from two sides of the spectroscope at the same time.

Description

technical field [0001] The invention relates to the technical field of up-conversion and photonic crystal luminescence, in particular to the preparation of a "sandwich" structure "beam splitter" based on photonic crystals and its luminescence regulation effect on up-conversion luminescent materials. Background technique [0002] Rare earth-doped upconversion luminescence is a nonlinear optical phenomenon that converts near-infrared light into ultraviolet or visible light through two-photon or multiphoton absorption. Due to its stable luminescent performance, rare earth doped up-conversion luminescent materials are widely used in the fields of solid-state laser, display and anti-counterfeiting. Rare earth ions have abundant energy levels, and energy level transitions lead to materials with multiple emission peaks. NaYF 4 :Yb 3+ / Er 3+ For example, there are two groups of obvious emission peaks in the visible light region, corresponding to 2 h 11 / 2 → 4 I 15 / 2 , 4 S 3...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G02B1/00
CPCG02B1/005
Inventor 武素丽刘宝琦常杰孟志鹏张淑芬
Owner DALIAN UNIV OF TECH