Patent ID: 11899285
Assignee: DANMARKS TEKNISKE UNIVERSITET
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 26:
27. A method for geometrically modifying high-index dielectric structures on a support structure, said method comprising:
a. providing a support structure,
b. providing a first plurality of high-index dielectric structures, said first plurality of high-index dielectric structures being supported by the support structure,
c. changing a geometry specifically of high-index dielectric structures within a second plurality of high-index dielectric structures, wherein the second plurality of high-index dielectric structures is a sub-set of the first plurality of high-index dielectric structures,
wherein said changing the geometry is carried out by photothermally melting at least a portion of each of the high-index dielectric structures within the second plurality of high-index dielectric structures by irradiating the second plurality of high-index dielectric structures with incident electromagnetic radiation having an incident intensity in a plane of the second plurality of high-index dielectric structures,
and thereby exciting resonances associated with each of the high-index dielectric structures within the second plurality of high-index dielectric structures,
wherein said support structure comprises a first plurality of topographical features comprising topographical pillars or topographical holes formed on a surface of the support structure,
and wherein the first plurality of high-index dielectric structures are given by:
a plurality of high-index dielectric structures on said topographical pillars or in said topographical holes,

and
a plurality of holes in a high-index dielectric film, wherein said holes correspond to said topographical features,

and
wherein said first plurality of high-index dielectric structures are prepared by depositing a high-index dielectric film on the support structure on said topographical pillars or in said topographical holes, and on the support structure between said topographical pillars or said topographical holes,

and wherein the relative permittivity at 532 nm of the first plurality of high-index dielectric structures is equal to or larger than 5.