EP 4323815 A1 20240221 - LOW-LOSS OPTICAL MATERIALS AND PROCESSES
Title (en)
LOW-LOSS OPTICAL MATERIALS AND PROCESSES
Title (de)
OPTISCHE MATERIALIEN UND VERFAHREN MIT GERINGEM VERLUST
Title (fr)
MATÉRIAUX ET PROCÉDÉS OPTIQUES À FAIBLE PERTE
Publication
Application
Priority
- US 202163175357 P 20210415
- US 202217720058 A 20220413
- US 2022025021 W 20220415
Abstract (en)
[origin: WO2022221662A1] An optical device includes a substrate, a first surface-relief grating including grooves and ridges formed on or in the substrate, a first overcoat layer in the grooves of the first surface-relief grating, and a first antireflective layer on the first overcoat layer. The ridges of the first surface-relief grating include high-refractive index, photoactive metal oxide nanoparticles and a material of the first overcoat layer in regions between the metal oxide nanoparticles, or the first overcoat layer includes the metal oxide nanoparticles and a material of the first antireflective layer in regions between the metal oxide nanoparticles. Methods of fabricating the optical device are also described.
IPC 8 full level
G02B 5/18 (2006.01); G02B 6/122 (2006.01); G02B 6/34 (2006.01); G02B 27/01 (2006.01); G02B 27/42 (2006.01); G03F 7/00 (2006.01)
CPC (source: EP)
G02B 5/1861 (2013.01); G02B 5/1866 (2013.01); G02B 27/0172 (2013.01); G03F 7/0002 (2013.01); G02B 5/1847 (2013.01); G02B 2027/0125 (2013.01); G02B 2027/0178 (2013.01)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
Designated validation state (EPC)
KH MA MD TN
DOCDB simple family (publication)
DOCDB simple family (application)
US 2022025021 W 20220415; EP 22721224 A 20220415