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1. WO2020109768 - METHOD FOR FABRICATING NANOSTRUCTURED OPTICAL ELEMENTS

Publication Number WO/2020/109768
Publication Date 04.06.2020
International Application No. PCT/GB2019/053328
International Filing Date 26.11.2019
IPC
G02B 1/00 2006.01
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
1Optical elements characterised by the material of which they are made; Optical coatings for optical elements
B23K 26/0622 2014.01
BPERFORMING OPERATIONS; TRANSPORTING
23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
26Working by laser beam, e.g. welding, cutting or boring
02Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
06Shaping the laser beam, e.g. by masks or multi-focusing
062by direct control of the laser beam
0622by shaping pulses
G11B 7/0045 2006.01
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
7Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation, reproducing using an optical beam at lower power; Record carriers therefor
004Recording, reproducing or erasing methods; Read, write or erase circuits therefor
0045Recording
CPC
B23K 2103/54
BPERFORMING OPERATIONS; TRANSPORTING
23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
2103Materials to be soldered, welded or cut
50Inorganic material, e.g. metals, not provided for in B23K2103/02B23K2103/26
54Glass
B23K 26/0006
BPERFORMING OPERATIONS; TRANSPORTING
23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
26Working by laser beam, e.g. welding, cutting or boring
0006taking account of the properties of the material involved
B23K 26/0624
BPERFORMING OPERATIONS; TRANSPORTING
23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
26Working by laser beam, e.g. welding, cutting or boring
02Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
06Shaping the laser beam, e.g. by masks or multi-focusing
062by direct control of the laser beam
0622by shaping pulses
0624using ultrashort pulses, i.e. pulses of 1ns or less
B23K 26/082
BPERFORMING OPERATIONS; TRANSPORTING
23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
26Working by laser beam, e.g. welding, cutting or boring
08Devices involving relative movement between laser beam and workpiece
082Scanning systems, i.e. devices involving movement of the laser beam relative to the laser head
B23K 26/0869
BPERFORMING OPERATIONS; TRANSPORTING
23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
26Working by laser beam, e.g. welding, cutting or boring
08Devices involving relative movement between laser beam and workpiece
0869Devices involving movement of the laser head in at least one axial direction
B23K 26/55
BPERFORMING OPERATIONS; TRANSPORTING
23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
26Working by laser beam, e.g. welding, cutting or boring
50Working by transmitting the laser beam through or within the workpiece
55for creating voids inside the workpiece, e.g. for forming flow passages or flow patterns
Applicants
  • UNIVERSITY OF SOUTHAMPTON [GB]/[GB]
Inventors
  • KAZANSKY, Peter
  • SAKAKURA, Masaaki
  • WANG, Lei
Agents
  • MCGOWAN, Cathrine
Priority Data
1819189.026.11.2018GB
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) METHOD FOR FABRICATING NANOSTRUCTURED OPTICAL ELEMENTS
(FR) PROCÉDÉ DE FABRICATION D'ÉLÉMENTS OPTIQUES NANOSTRUCTURÉES
Abstract
(EN)
A method of fabricating an optical element comprises: providing a substrate of a transparent material; applying a plurality of circularly polarised focussed femtosecond laser pulses to a volume within the substrate to create substantially spherical nanopores in the volume; and applying at least one and not more than ten non-circularly polarised focussed femtosecond laser pulses to the volume to transform the spherical nanopores into oblate spheroidal nanopores.
(FR)
L'invention concerne un procédé de fabrication d'un élément optique comprenant : la fourniture d'un substrat d'un matériau transparent ; l'application d'une pluralité d'impulsions laser femtosecondes focalisées à polarisation circulaire à un volume à l'intérieur du substrat pour créer des nanopores sensiblement sphériques dans le volume ; et l'application d'au moins une et pas plus de dix impulsion(s) laser femtoseconde(s) focalisée(s) à polarisation non-circulaire au volume pour transformer les nanopores sphériques en nanopores sphéroïdes aplatis.
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