Plasma excimer gain waveguide

Abstract

The invention relates to the field of optical waveguide technology. The invention provides a plasma excimer gain waveguide, including a base layer, a medium layer, an isolation layer and a gain waveguide. The medium layer is placed on the bare surface of the base layer. The isolation layer is between the medium layer and the gain waveguide. One end of the gain waveguide near the dielectric layer is wedge-shaped and the tip faces the dielectric layer. The refractive index of the gain waveguide is greater than that of the isolation layer. The plasma excimer gain waveguide has the advantages that one end of the gain waveguide near the dielectric layer is wedge-shaped, the distance between the top of the wedge-shaped structure and the metal is fixed, the isolation layer with low refractive index is kept, and the plasma excimer coupling of the gain waveguide and the metal is improved by adjusting the angle of the wedge-shaped point angle.

Description

technical field [0001] The invention relates to the field of optical waveguide technology, in particular to a plasmon gain waveguide. Background technique [0002] The collective oscillations generated by the electron gas at the metal-dielectric interface under the excitation coupling of electromagnetic waves exhibit singular optical properties, which are so-called surface plasmon properties. Its light field intensity attenuates exponentially in the vertical direction at the interface between the metal and the dielectric, and can confine the light to a range of tens of nanometers or even smaller on the metal surface, which can break through the traditional light diffraction limit. The super-strong optical locality of surface plasmon polaritons shows great application potential in the fields of nanophotonics and optoelectronic integration, and provides the possibility to realize nanolaser light sources and highly integrated nanophotonics devices. [0003] In the practical ap...

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Problems solved by technology

However, there is also a contradiction between threshold gain and locality in this structure. In order to reduce the threshold gain of gain waveguide coupled plasmon propagation, the thickness of the isolation layer can be increased to keep the gain waveguide structure away from the metal, so that the energy of plasmons will be diverted into the gain waveguide, thereby reducing metal heat loss and reducing threshold gain

But this will weaken the coupling between the gain waveguide and the metal plasmon, and the localization of light will deteriorate

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