Composite one-dimensional photonic crystal nanobeam cavity surface plasmon laser

Abstract

The invention discloses a composite one-dimensional photonic crystal nanobeam cavity surface plasmon laser and belongs to the field of micro-nano optics. The composite one-dimensional photonic crystalnanobeam cavity surface plasmon laser mainly includes metal, a low-refractive-index layer, an active gain dielectric layer, a gradient conical one-dimensional photonic crystal, a uniform one-dimensional photonic crystal, and a waveguide structure. By using the near-field enhancement and local characteristics of the surface plasmon, and the restriction and feedback characteristics of the compositeone-dimensional photonic crystal, the interaction between a single surface plasmon resonant cavity and the composite one-dimensional photonic crystal nanobeam cavity is enhanced. In combination withthe advantages of both resonant cavities, a resonant cavity structure with a large Q value, a small mode volume, and high laser directional coupling output efficiency is designed, which is important for studying a compact new light source having a fast rate and high beam coupling efficiency.

Description

technical field [0001] The invention relates to the field of micro-nano photonic devices / semiconductor lasers, in particular to a composite one-dimensional photonic crystal nano-beam cavity surface plasmon laser. Background technique [0002] The rapid development of information technology requires faster calculations and larger data volumes, so denser components and smaller sizes are required. As a solution for future information technology, optical interconnection has large digital capacity and bandwidth. Due to the existence of diffraction limits, The size of the device cannot be infinitely small, and the surface plasmon has the characteristics of near-field local enhancement, and its distribution depth can be smaller than the wavelength order, which can break through the diffraction limit and is beneficial to the production of optoelectronic integrated devices. Surface plasmon lasers can achieve deep subwavelength and even nanoscale laser emission. With the development ...

AI Technical Summary

Problems solved by technology

[0003] The traditional laser structure is limited by the diffraction limit, and the structure size is in the order of wavelength, while the size of the surface plasmon nanolaser can break through the diffraction limit of light, but due to the existence of a metal layer, the resonator has a large loss and a low Q value, and It is difficult to achieve directional high coupling output for a single surface plasmon resonator

Images