Nano-cavity laser of molecule-doped thin film layer with electroexcitation

Abstract

The invention, which belongs to the laser field, relates to a nano-cavity laser of a molecule-doped thin film layer with electroexcitation. The laser comprises a p-surface electrode, a substrate, an electroluminescent medium, a molecule-doped thin film layer, an n-surface electrode, and a nanowire structure. The electroluminescent medium, the molecule-doped thin film layer, the n-surface electrode, and the nanowire structure are arranged on the surface of the substrate successively; and the underneath of the substrate is plated with the p-surface electrode. According to the invention, surface plasma is provided by a metal electrode; an electric field with strong localization is formed by utilizing a mixing structure of metal, low-dielectric constant thin film layer and electroluminescent medium. Multi-energy-level molecules are doped in an insulating layer; multi-energy-level molecule system is excited to absorb a photon; and transition is formed and another photon is emitted. Direct coupling is carried out on the emitted photon, so that surface plasmon is formed; and the surface plasmon is transmitted and lased along the metal surface of the nanowire. According to the invention, present problems including difficulty in electroexcitation, great difficult in making technology, high cost, and difficulty in promotion are effectively solved.

Description

technical field [0001] The invention belongs to the field of lasers, in particular to an electrically excited molecule-doped thin-film layer nanocavity laser. Background technique [0002] With the development and maturity of nano-microprocessing technology, the miniaturization of lasers is developing faster and faster. Subwavelength microcavity and nanocavity lasers based on surface plasmon polaritons (Surface Plasmon Polariton, SPP) are due to their High sensitivity, small size, and concentrated energy are more used in the fields of biological detectors, information storage, optical computing, near-field optical imaging, nano-lithography technology and molecular manipulation technology; and, with the development of science and technology, There is a growing demand for ultra-compact laser light sources in more and more fields. [0003] Due to the limitation of light wavelength and the influence of diffraction effect, traditional lasers in general sense cannot compress lase...

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Problems solved by technology

[0006] In order to solve the above problems, the present invention provides an electro-excited molecule-doped thin-film layer nanocavity laser, which can effectively solve the existing problems of electro-excitation difficulties, difficult manufacturing process, high cost, and difficult promotion.

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