Near-field Interaction Control Element for Sub-wavelength Light Confinement
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Solution Overview
Problem
Conventional techniques fail to effectively control near-field interactions and vary the dielectric constant in small areas, limiting the confinement of light and efficient information transfer between particles, especially in nanophotonics applications.
Innovation Solution
A near-field interaction control element comprising a near-field optical waveguide with particles of specific size and dielectric constant, an electron injector/discharger to vary the dielectric constant, and components for introducing and emitting near-field light, allowing for precise control of dielectric constant variations and enhanced near-field interactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If conventional techniques are used to control light in small areas, then light confinement is limited by diffraction, but the area cannot be reduced below wavelength scale
Solution Approach 1:
The patent changes the fundamental parameter of light propagation by transitioning from far-field propagating light to near-field evanescent light. This parameter change allows light to be confined in areas smaller than the wavelength limit, directly resolving the contradiction between small area confinement and diffraction limitations
Solution Approach 2:
The patent replaces the conventional optical mechanical system (lenses, mirrors, waveguides) with a near-field interaction system using sub-wavelength particles. This substitution enables light confinement at scales below the diffraction limit, achieving reliable light control in ultra-small areas
2Illumination intensity
If the dielectric constant of particles is varied to control near-field interactions, then near-field light intensity can be modulated, but conventional techniques cannot significantly control the dielectric constant
Solution Approach 1:
The patent utilizes phase transitions of particles between insulator and metal states to dynamically control the dielectric constant. This phase transition mechanism provides significant and reversible control over the dielectric constant, enabling effective modulation of near-field light intensity and resolving the contradiction between intensity modulation and dielectric constant control capability
Solution Approach 2:
The patent introduces dynamic control of particle properties through external stimuli (light irradiation, magnetic field, temperature). This dynamic adaptability allows the system to switch between different dielectric constant states, enabling versatile control of near-field interactions while maintaining high near-field light intensity modulation capability
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables efficient control of near-field interactions and information transfer by varying the dielectric constant, overcoming the limitations of diffraction and achieving significant modulation of near-field light intensity and phase transitions.
Implementation Method 1
an electron injector/discharger injecting or discharging an electron into or from the particles contained in the near-field optical waveguide to vary a dielectric constant of the near-field optical waveguide
Implementation Method 2
a near-field light introducing part introducing near-field light into the near-field optical waveguide; and a near-field light emitting part emitting the near-field light having guided through the near-field optical waveguide
Implementation Method 3
particles formed of a substance which exhibits a phase transition from an insulator phase to a metal phase in response to irradiation with light, magnetic field change or temperature change
Data Source
AI summary
A near-field interaction control element includes a near-field optical waveguide containing particles formed of a metal, a metal anion or a metal cation with a diameter of 0.5 nm or more and 3 nm or less and a dielectric constant of −2.5 or more and −1.5 or less, an electron injector/discharger injecting or discharging an electron into or from the particles contained in the near-field optical waveguide to vary a dielectric constant of the near-field optical waveguide, a near-field light introducing part introducing near-field light into the near-field optical waveguide, and a near-field light emitting part emitting the near-field light having guided through the near-field optical waveguide.