Three-dimensional asymmetric miniature resonant cavity polymer single-mode laser

Abstract

The invention discloses a three-dimensional asymmetric miniature resonant cavity polymer single-mode laser, and belongs to the field of dye miniature resonant cavity lasers. A femtosecond laser micro-nano machining system is employed at first for the machining of SU-8 photoresist materials doped with dye Rhodamin B, thereby forming a polymer miniature resonant cavity laser. The shape of the miniature resonant cavity employs a no-pillar structure to be directly integrated on a substrate, and a double-layer stacked three-dimensional structure is designed, wherein the double-layer stacked three-dimensional structure is specifically a three-dimensional geometrical asymmetric structure where a spiral ring in a smaller size is internally tangent to a circular ring. The laser manufactured through the above method achieves the emission of laser with a single-longitudinal-mode wavelength under the room temperature, and the emitted laser is better in direction selectivity in a port direction of the spiral ring, thereby facilitating the further coupling and integration of a miniature optical element and the application in the field of light interconnection.

Description

technical field [0001] The invention belongs to the technical field of dye micro-resonator lasers, in particular to a micro-resonator polymer single-mode laser with a three-dimensional geometric asymmetric structure. Background technique [0002] Microcavity laser is an important field of active development in electronics and photonics in recent years, and its core part is a microresonator that can provide smaller mode volume confinement and higher quality factor. The most common is the whispering gallery mode microresonator based on the total reflection propagation of light that occurs at the interface position of different refractive index materials to provide the confinement and selection of the lasing mode. Whispering gallery micro-resonators are generally symmetrical in geometric structure, such as flat disks, rings, three-dimensional spheres, hemispheres, and cylinders. These micro-resonators are small in size, simple in preparation, high in integration, relatively Be...

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Problems solved by technology

However, traditional polymer lasers need a pillar to increase the difference between the refractive index of the microresonator and the surrounding environment and avoid the loss caused by light leakage (references 1-3), and the existence of this pillar will make the prepared micro The resonant cavity is prone to collapse and deformation, and it is not conducive to further coupling with other optical components

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