9 results about "Organic laser" patented technology

The invention discloses a circular polarization organic laser material and a preparation method and application thereof, and the preparation method of the circular polarization organic laser material comprises the following steps: taking chiral amine, rare earth chloride and hydrochloric acid as raw materials, placing the raw materials in a solvent, and heating for reaction to obtain a precursor solution; after drying the precursor solution, dissolving again to obtain a transparent solution; and putting the open container filled with the transparent solution into a closed container filled with an anti-solvent, and growing the zero-dimensional perovskite structure luminescent material A4BX7 single crystal by utilizing the diffusion of the anti-solvent. The chiral ligand is introduced into the hybrid perovskite, a chiral environment is successfully introduced into an inorganic perovskite system, chiral transfer is realized, and the prepared circular polarization organic laser material has good circular polarization organic laser properties and high fluorescence quantum yield.

The invention discloses an organic photonic crystal microcavity laser, and belongs to the field of active photonic devices and organic lasers, a light-emitting layer of the laser is prepared from an organic material, and a periodic photonic crystal structure is constructed on a functional layer of the laser. The construction method of the photonic crystal structure comprises the following steps: etching a functional layer of the laser to form the photonic crystal structure with periodic holes; or, the middle area of the functional layer of the laser is reserved and not etched, the periodic holes are etched in the functional layer without the middle area, and the formed photonic crystal structure is a defect type microcavity structure with the middle area not etched. The laser is of an electric pump type or an optical pump type, and an electric pump type light-emitting layer is made of Alq3 or DCM. And the material of the optical pump type light emitting layer is a mixture of PMMA (polymethyl methacrylate) and PM-597 or t-Bu-RhB. The structures can form an in-plane resonant cavity with a high Q value, a high limiting factor of a light field in a light emitting area and a photonic crystal area is realized, and the performance of the laser is improved.

The invention belongs to the field of lasers, and particularly relates to a dual-wavelength composite resonance optical pumping organic laser and a preparation method thereof.The laser comprises a bottom Bragg reflector, a grating layer, an active layer, a medium compensation layer and a top Bragg reflector which are sequentially arranged from bottom to top; the bottom Bragg reflector, the grating layer, the active layer, the medium compensation layer and the top Bragg reflector form a vertical resonant cavity. On the basis of a conventional DFB laser structure, the DBR structure is added in the vertical direction, and the resonant wavelength of the DBR is locked on the pumping wavelength, so that the pumping intensity in the resonant cavity is remarkably improved, the excitation threshold value is further reduced, high-efficiency optical pumping excitation is realized, and heat loss is reduced.

This invention discloses a boron-oxygen-doped π-extended uracil, with the following general structural formula: where R1, R2, R3, and R4 are independent substituted or unsubstituted groups, including alkyl and aryl groups; Ar 1 The groups represent different types of aryl groups. This invention synthesizes a class of boron-oxygen-doped π-extended uracils and explores their photoelectric properties, providing more solutions for obtaining more efficient organic optoelectronic materials. This invention employs an improved synthesis method that makes the reactants inexpensive and readily available, avoids the use of toxic reagents, and is simple and easy to perform. The compounds have wide applications in organic light-emitting diodes, organic solar cells, organic field-effect transistors, organic lasers, organic sensors, molecular switches, and pharmaceutical intermediates.

The application relates to the technical field of organic laser materials, in particular to an ASE threshold and wavelength prediction model training method and an organic laser material performance prediction method, wherein the method comprises the following steps: acquiring the molecular structures and optical physical parameters of a plurality of reference organic laser materials; identifying the amplified spontaneous emission (ASE) threshold and wavelength in the optical physical parameters; generating a data set according to the molecular structures and the ASE threshold and wavelength of the reference organic laser materials; constructing an ASE threshold and wavelength prediction model based on a machine learning algorithm, training the prediction model by using the data set, and predicting the ASE threshold and wavelength of a target organic laser material based on the trained prediction model. Therefore, the problems that the related art is time-consuming and high in cost in finding low-amplified spontaneous emission threshold organic laser molecules, and it is difficult to quickly and effectively screen suitable molecules are solved.

The invention discloses an electrically driven perovskite laser and a preparation method thereof, the device takes a perovskite semiconductor or a combination of the perovskite semiconductor and other materials as a main gain medium, and laser emission can be generated under the driving of current or voltage without the assistance of an external light source. The device type comprises an electrically driven integrated (including a single cavity and double cavities) and a non-integrated perovskite laser, and the laser threshold is less than 10000 A / cm < 2 > and can be less than 100 A / cm < 2 > after optimization. In the embodiment, a double-cavity structure is formed by vertically stacking the high-power microcavity perovskite light-emitting diode subunit and the low-threshold microcavity perovskite light amplification subunit, electrically-driven perovskite laser emission is achieved for the first time, the inter-cavity optical coupling efficiency exceeds 80%, the half-peak width of a laser spectrum is about 0.5 nm, and the threshold is as low as 92 A / cm < 2 > and is about 7 times lower than that of an electrically-driven integrated organic laser. The laser can be integrated on a silicon-based substrate, the modulation bandwidth reaches 36.2 MHz or above, the GHz magnitude is expected to be reached after optimization, and the laser has potential application value in the field of communication and calculation.

This invention relates to the field of organic photonics and laser device technology, specifically disclosing a laser based on a mesoporous titanium dioxide substrate and its fabrication method. The laser comprises a transparent substrate, a mesoporous titanium dioxide thin film on the substrate, and an organic conjugated polymer gain medium layer on the titanium dioxide thin film. The mesoporous titanium dioxide layer is fabricated by spraying or spin coating, utilizing its disordered porous structure to provide light scattering feedback. Low-threshold random laser emission can be achieved under optical pumping without the need for a traditional precision resonant cavity. This device features a simple structure, low fabrication cost, good process compatibility, and applicability to polymer gain media with various emission wavelengths, providing a new technical path for realizing low-cost, easily integrated electrically pumped organic lasers.

The invention belongs to the technical field of new materials, and particularly discloses a short-service-life strong-radiation-light-emitting organic laser gain material and preparation and application thereof.The preparation method of the organic laser gain material comprises the following steps that 1, 4-bis [4-(N, N-dimethylaminophenyl) styryl] biphenyl and 4, 4 '-dibromo terphenyl are sequentially added into methylbenzene, stirring is carried out, and the organic laser gain material is obtained; after ultrasonic dissolution, cooling, then adding ethanol, standing, and separating out a yellow green solid; and collecting the solid, and carrying out vacuum drying to obtain microcrystals, namely the organic laser gain material. Based on the organic laser gain material, a microcrystalline deposition layer with uniform thickness is formed on the surface of a quartz plate through a self-settling strategy, luminescence quenching caused by introduction of a high polymer material is avoided, and the organic laser gain material can be used for high-resolution imaging. Through a host-guest eutectic engineering strategy, collaborative optimization of X-ray absorption and ultrafast radiation luminescence in the organic scintillator material is successfully realized, and a universal path is developed for solving the contradiction between heavy atom introduction and fluorescence quenching.

The present invention provides a highly efficient organic laser element 1 in which optical absorption loss and optical leakage in the waveguide are reduced. [Solution] The device comprises a light incident surface (first surface Sf1) into which light is incident, a light exit surface (second surface Sf2) intersecting the light incident surface, and a groove-shaped waveguide (trench waveguide 8) formed across the light incident surface and the light exit surface. The waveguide is provided with a DFB grid 4 having repeatedly formed protrusions 5 and grooves 6, each of which extends in a direction intersecting the light incident surface, and furthermore, the protrusions 5 and grooves 6 intersect in the direction in which the waveguide extends toward the light exit surface.