Terahertz or infrared filter using shape resonance
AssigneeSeoul National University Industry Foundation
InventorsDae-Sik Kim, Sae Jeoung, Joong Lee, Min Seo
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Abstract
A filter having a high transmittance is disclosed. The filter comprises a substrate having a first surface and a second surface, and a periodic or random array of through-holes formed so as to pass through the first surface and the second surface. The through-hole has a size of subwavelength at a range of infrared and terahertz wave. Here, transmission resonance characteristic of incident light on the first surface is controlled by a shape of the through-hole.
Claims25
A filter having a high transmittance, the filter comprising:
- a substrate having a first surface and a second surface;
- and
- a periodic or random array of through-holes formed so as to pass through the first surface and the second surface, the through-hole having a size of subwavelength at a range of infrared and terahertz wave,
- wherein transmission resonance characteristic of incident light on the first surface is controlled by a shape of the through-hole.
A single resonance filter having a high transmittance, the resonance filter comprising:
- a substrate having a first surface and a second surface;
- and
- a periodic or random array of through-holes formed so as to pass through the first surface and the second surface, the through-hole having a size of subwavelength and a symmetrical shape with respect to polarization direction of incident light towards the first surface,
- wherein single transmission resonance characteristic of the incident light is controlled by a shape of the through-hole.
The single resonance filter as claimed in claim 8, wherein the symmetrical shape includes a square shape, a rectangular shape, a circular shape, a slit shape, or a combination thereof.
A multiple resonance filter having a high transmittance, the resonance filter comprising:
- a substrate having a first surface and a second surface;
- and
- a periodic or random array of through-holes formed so as to pass through the first surface and the second surface, the through-hole having a size of subwavelength and an asymmetrical shape with respect to polarization direction of incident light towards the first surface,
- wherein one or more single transmission resonance characteristics of the incident light is controlled by the asymmetrical shape of the through-hole.
Dependencies are inferred from the claim text.