Plasma Laser Based On Plasmon Resonance

Lasers are widely used in scientific research,electrical,medical,industrial,telecommunications and other fields.With the rapidly development of scientific technology and the miniaturization of electronic devices,it is believed that nanolasers will be incorporated into integrated optical circuits as a new type of nanometer coherent light source in the future.The outstanding advantage of plasma laser based on plasmon resonance is that it can break the diffraction limit,and it can realize the laser emission of deep subwavelength and nanometer.So it have wide applications,such as optical interconnection,near-field spectroscopy,sensing and biological systems.Otherwise,the improvement of the preparation technology of modern metallic materials and the gradual maturity of the micro-nano processing technology also provide the technical conditions for the development of plasmon lasers.Based on the existing research back ground of plasma laser,this paper analyzed and summarized the research progress and application of plasma laser,and expounded several main types and applications of plasmon laser.Then we discussed the surface plasmon types and their resonance coupling.This paper used the finite element software COMSOL to study the performance of plasmon resonance structure plasma laser and theoretically demonstrated that a plasma laser based on surface plasmon resonance structure with high intensity can be realized.Draw the following conclusions:(1)The metal structure has ohmic loss and radiation loss.The problems are solved from two aspects: reducing radiation loss and adding gain media to provide energy.Due to the plasma hybridization and strong coupling effect between the surface plasmon,the coupled system can increase the local near-field energy,and the surface plasmon resonance structures are more beneficial to the generation of plasmon nanolaser.The plasmon resonance structure is composed of two major parts of the gold film substrate and the gold disk array,which supports two strong resonance resonance modes(i.e.surface plasmon polariton(SPP)and localized surface plasmon(LSP)),which the paper designs.More than 106 times scattering enhancement can be achieved for the LSP-SPP coupled laser when the optical gain k reaches the best and are smaller than 0.3.(2)The coupling of the SPP and LSP possess lower dissipation losses and more significant E-field enhancement than the LSP resonance structure,and the scattering cross-section of the LSP-SPP coupled laser is 80 times higher than the LSP resonance structure laser.In contrast to the LSP resonance structure,the LSP-SPP coupled structure based on gold dimer structure can achieve a higher-performance lasing.(3)A tunable dual-wavelength spaser can be developed using LSP-SPP coupled structure.A compact integrated coherent source with tunable dual-wavelength output is beneficial to miniaturize active optical devices.Such dual-wavelength lasers have potential applications,such as ultrafast optical communications,wavelength-division multiplexing,and terahertz radiation generation.