A dye self-polymerized thin film random laser and its preparation method

A random laser and self-aggregation technology, applied in the laser field, can solve the problem of high random laser threshold, and achieve the effects of lowering the preparation cost, lowering the threshold and simplifying the preparation process.
CN106169693BActive Publication Date: 2020-01-03SOUTHEAST UNIV
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
SOUTHEAST UNIV
Publication Date
2020-01-03

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Abstract

The invention discloses a dye auto-polymerized thin film random laser. The dye auto-polymerized thin film random laser comprises external pump light and a thin film sample, wherein the thin film sample consists of a glass negative and a PDMS thin film; the glass negative and the PDMS thin film together form a leakage waveguide structure; and the PDMS thin film contains an auto-aggregated dye micro-nano crystal which is formed by auto aggregation of PM597 dye molecules. The invention furthermore discloses a preparation method of the dye auto-polymerized thin film random laser. According to the dye auto-polymerized thin film random laser, the low-concentration dye molecules are low in energy of self-absorption loss, so that the threshold value of the random laser is reduced and then the energy loss of the pump light is reduced; the solubility of the dye molecules change and the dye molecules aggregate to form the micro-nano crystal which serves as a scattering medium and a gain medium in a random laser outgoing process, so that the preparation method of the random laser is simplified; and the thin film random laser is low in threshold value and simple in preparation process.
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Description

technical field

[0001] The invention relates to the field of laser technology, in particular to a dye self-polymerization film random laser and a preparation method thereof. Background technique

[0002] In recent years, random lasers have become a hot research field in the international laser community. There are many significant differences between random lasers and traditional lasers in terms of generation mechanism and luminescence characteristics. Random laser radiation originates from activated disordered media, and provides optical feedback through multiple scattering of radiated light in the media, thereby obtaining greater gain without Additional resonator. Random laser radiation can be observed in all directions, and when the viewing angle is different, the spectral line structure and emission intensity will also change, and the luminescence characteristics fluctuate randomly in time, space, and spectrum. Due to its special feedback mechanism, random laser has th...

Claims

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