Plasmonic optical waveguide using plasmonic coupling between nano-aperture and nano-particle

Patent metadata

Field	Value
Publication number	US-9417386-B2
Application number	US-201514696046-A
Country	US
Kind code	B2
Filing date	Apr 24, 2015
Priority date	Apr 25, 2014
Publication date	Aug 16, 2016
Grant date	Aug 16, 2016

Abstract

The present invention relates to a plasmonic optical waveguide using plasmonic coupling between a nano-aperture and a nano-particle. The plasmonic optical waveguide includes the nano-aperture formed with an opening of a nano-scale through which light enters; and a single metal nano-particle arranged at the focal point of the nano-aperture to generate plasmon coupling in association with the light output from the nano-aperture. The plasmonic optical waveguide has an effect of forming a small and strong high-intensity high-density light spot of a sub-wavelength size, in which an amplification rate is increased at the output surface of the nano-particle more than a few hundred times compared with the incident light, since the light is transmitted by plasmon coupling generated between the nano-aperture and the nano-particle.

First claim

What is claimed is:

1. A plasmonic optical waveguide comprising:
a nano-aperture formed with an opening of a nano-scale on one side to pass light; and
a metal nano-particle positioned on the one side on which the opening is formed and positioned at or near a focal point of the nano-aperture to generate plasmon coupling by interacting with the nano-aperture,
wherein the position of the focal point of the nano-aperture is formed at the ridge tip of the opening, and the ridge tip is a point where the ridge meets one side of the nano-aperture, and
a fixing means for fixing the metal nano-particle,
wherein one end of the fixing means is connected to the one side of the nano-aperture, and the other end is connected to the metal nano-particle.

2. The plasmonic optical waveguide according to claim 1 , wherein the metal nano-particle is positioned to contact with the one side on which the opening is formed.

3. The plasmonic optical waveguide according to claim 1 , wherein the metal nano-particle is positioned across an area in which the opening is formed and the other area of the one side.

4. The plasmonic optical waveguide according to claim 1 , wherein the opening has a ridge, and the metal nano-particle is positioned on an imaginary line extended from the ridge.

5. The plasmonic optical waveguide according to claim 1 , wherein the fixing means includes a dielectric layer formed on the one side of the nano-aperture, and the metal nano-particle is buried and fixed in the dielectric layer.

6. A plasmonic optical waveguide comprising:
a nano-aperture formed with an opening of a nano-scale created by a light spot on one side;
a metal nano-particle positioned on the one side on which the opening is formed and positioned at a position where the light spot of the nano-aperture is generated to generate plasmon coupling by interacting with the nano-aperture; and
a fixing means formed on the one side of the nano-aperture to fix the metal nano-particle,
wherein the fixing means is an insulation layer coated on the one side, and the metal nano-particle is buried in the insulation layer.

Assignees

• Industry-Academic Cooperation Foundation Yonsei Univ

Inventors

• Park No Cheol
• Lee Won Sup
• Kim Do Hyung
• Moon Hyungbae
• Choi Guk Jong
• Jeon Sungbin
• Lim Geon

Classifications

• G02B6/107

  Subwavelength-diameter waveguides, e.g. nanowires · CPC title

• Y10S977/773

  Nanoparticle, i.e. structure having three dimensions of 100 nm or less · CPC title

• H01S3/063

  Waveguide lasers, {i.e. whereby the dimensions of the waveguide are of the order of the light wavelength (waveguide gas lasers H01S3/0315)} · CPC title

• B82Y20/00

  Nanooptics, e.g. quantum optics or photonic crystals · CPC title

• H01S3/169

  Nanoparticles, e.g. doped nanoparticles acting as a gain material · CPC title