CN108242762A

CN108242762A - A kind of adjustable Random Laser chip based on two-sided PDMS folds

Info

Publication number: CN108242762A
Application number: CN201810189388.2A
Authority: CN
Inventors: 陈景东; 宋亚婷; 王文杰; 刘绍鼎; 冀炜邦
Original assignee: Taiyuan University of Technology
Current assignee: Taiyuan University of Technology
Priority date: 2018-03-08
Filing date: 2018-03-08
Publication date: 2018-07-03
Anticipated expiration: 2038-03-08
Also published as: CN108242762B

Abstract

A kind of adjustable Random Laser chip based on two-sided PDMS folds of the present invention, belongs to Random Laser chip technology field；The technical problem to be solved is that the adjustable Random Laser chips for providing low cost, preparation is simple and convenient to operate；Solve technical solution that the technical problem uses for：Including the first PDMS pieces, gain media solution and the 2nd PDMS pieces, the lower surface of first PDMS pieces has pleated structure, the upper surface of 2nd PDMS pieces has pleated structure, and gain media solution is clipped between the first PDMS pieces and the 2nd PDMS pieces, and is contacted with its wrinkled surface；Pumping laser pumps the adjustable Random Laser chip, moves one of PDMS pieces along perpendicular to fold direction, the fold period formed between two PDMS pieces can change, and the wavelength of shoot laser also changes therewith；It the composite can be widely applied to Random Laser chip field.

Description

A kind of adjustable Random Laser chip based on two-sided PDMS folds

Technical field

A kind of adjustable Random Laser chip based on two-sided PDMS folds of the present invention belongs to Random Laser chip technology neck Domain.

Background technology

Traditional laser chip include gain media resonant cavity, wherein resonator be typically by two pieces of speculum groups into, Coherent feedback can be generated.And Random Laser chip does not have resonator, there are two types of its feedback mechanism possibility：One kind be light by with Inside the interface portion reflected back into medium of machine medium and air, so as to form feedback；Another kind is light beam shape in random medium Into closed circuit, so as to function similarly to the feedback effect of resonator.For traditional laser chip, to use up in an experiment It possibly avoids scattering, and Random Laser chip is then different, it is exactly that the multiple scattering of light wave is formed using random medium Laser.So the physical mechanism of both laser chips is entirely different, it is unique just so that Random Laser chip is provided with some The characteristics of luminescence.

So far, various types of microcavitys are had been developed in traditional laser chip, although in microcavity design It is made a considerable effort in terms of optimization, but the accurate manufacture of soft light carving technology and the accurate control of flow rate of liquid still have very Big challenge both increases huge complexity in manufacture and operation.Recently, light fluid and random structure are fused to chip Upper Random Laser source, which integrates, provides new approach.Bhaktha etc. is since the precision of soft lithographic is limited, based on snakelike poly- diformazan silicon Oxygen alkane（Polydimenthylsoloxane, PDMS）The fold of channel, it was demonstrated that light fluid Random Laser, this greatly reduces The demand of high standard manufacturing technology.Chen Xianfeng et al. is handled the PDMS surfaces of stretching using oxygen plasma, stretching PDMS can be formed on its surface fold after stress release, and produce Random Laser using PDMS folds.This is further Preparation process is simplified, reduces manufacturing cost.

It is a kind of simple effective method to generate Random Laser using PDMS folds.The period of fold is to wavelength of laser etc. Performance has important influence.The chip prepared using a PDMS folds piece and a PDMS plain film is needed during the experiment Prepare the fold of many piece different cycles；In operation, external influence factor can be made substantially by replacing the fold of different cycles Rise, experimentation becomes complicated cumbersome.Therefore a kind of fold period adjustable chip can be prepared, it is adjustable so as to reach generation The purpose of Random Laser.

Invention content

A kind of adjustable Random Laser chip based on two-sided PDMS folds of the present invention, overcome it is of the existing technology not Foot provides low cost, prepares the adjustable Random Laser chip being simple and convenient to operate.

In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention is：It is a kind of based on two-sided PDMS folds can Random Laser chip is adjusted, including the first PDMS pieces, gain media solution and the 2nd PDMS pieces, the lower surface of the first PDMS pieces has Pleated structure, the upper surface of the 2nd PDMS pieces have pleated structure, and gain media solution is clipped in the first PDMS pieces and the 2nd PDMS Between piece, and contacted with its wrinkled surface；Pumping laser pumps the adjustable Random Laser chip, along perpendicular to fold One of PDMS pieces are moved in direction, and the fold period formed between two PDMS pieces can change, the wavelength of shoot laser Also it changes therewith.

Further, the thickness of the PDMS pieces is 0.1mm~2mm.

Further, the gain media solution is dye molecule solution or quantum dot solution.

The present invention has the advantages that compared with prior art.

1st, there are the PDMS pieces of fold using two panels, the laser of different wave length can be generated by changing the fold period, is had Quickly, the characteristics of easy to operate.

2nd, it only needs, by the one of PDMS pieces of movement, just to generate the laser of different wave length, does not need to replace chip, behaviour It is simple to make process, is influenced by extraneous factor smaller.

3rd, avoiding the chip prepared using a PDMS folds piece and a PDMS plain film needs to prepare different fold weeks The problem of phase, have the characteristics that low cost, prepare it is simple.

Description of the drawings

Fig. 1 is the schematic cross-sectional view of the present invention.

In figure, the first PDMS pieces of 1-, 2- gain media solution, the 2nd PDMS pieces of 3-.

Specific embodiment

The present invention is described further below in conjunction with the accompanying drawings.

As shown in Figure 1, a kind of adjustable Random Laser chip based on two-sided PDMS folds of the present invention, the laser chip include First PDMS pieces 1,2 and the 2nd PDMS pieces 3 of gain media solution.The lower surface of first PDMS pieces 1 have pleated structure, second The upper surface of PDMS pieces 3 has pleated structure, and gain media solution 2 is clipped between the first PDMS pieces 1 and the 2nd PDMS pieces 3, and It is contacted with its wrinkled surface；Pumping laser pumps the adjustable Random Laser chip, when light in gain media solution and The light amplification that the scattering of PDMS wrinkled surfaces is formed will generate laser, along perpendicular to fold to when overcoming loss enough One of PDMS pieces are moved in direction, and the fold period formed between two PDMS pieces can change, the wavelength of shoot laser Also it changes therewith.

Embodiment 1

The length of first PDMS pieces 1 is 4cm, width 4cm, thickness 0.1mm.The lower surface of first PDMS pieces 1 has fold Structure, fold period are 2 μm.Gain media solution 2 is the rhodamine 6G of 1mM（R6G）Ethylene glycol solution.2nd PDMS pieces 3 Length is 4cm, width 4cm, thickness 2mm.The upper surface of 2nd PDMS pieces 3 has pleated structure, and the fold period is 2 μm.

Embodiment 2

The length of first PDMS pieces 1 is 3cm, width 3cm, thickness 2mm.The lower surface of first PDMS pieces 1 has fold knot Structure, fold period are 1 μm.Gain media solution 2 is 2 μM of CdSe/ZnS quantum dot solutions.The length of 2nd PDMS pieces 3 is 3cm, width 3cm, thickness 0.12mm.The upper surface of 2nd PDMS pieces 3 has pleated structure, and the fold period is 3 μm.

Although the present invention, those skilled in the art are particularly shown and described with reference to its exemplary embodiment It should be understood that in the case where not departing from the spirit and scope of the present invention that claim is limited, form can be carried out to it With the various changes in details.

Claims

1. a kind of adjustable Random Laser chip based on two-sided PDMS folds, it is characterised in that：Including the first PDMS pieces（1）, increase Beneficial medium solution（2）With the 2nd PDMS pieces（3）, the first PDMS pieces（1）Lower surface have pleated structure, the 2nd PDMS pieces（3） Upper surface have pleated structure, gain media solution（2）It is clipped in the first PDMS pieces（1）With the 2nd PDMS pieces（3）Between, and with Its wrinkled surface contacts；Pumping laser pumps the adjustable Random Laser chip, it is moved along perpendicular to fold direction In a PDMS piece, the fold period formed between two PDMS pieces can change, and the wavelength of shoot laser also occurs therewith Variation.

2. a kind of adjustable Random Laser chip based on two-sided PDMS folds according to claim 1, it is characterised in that:It is described PDMS pieces thickness be 0.1mm~2mm.

3. a kind of adjustable Random Laser chip based on two-sided PDMS folds according to claim 1, it is characterised in that:It is described Gain media solution（2）For dye molecule solution or quantum dot solution.