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US 2026/0202318 A1Published application
Optical sensor and sensing method
AssigneeCity University of Hong Kong
InventorsJuan Antonio Zapien, Yun Zhang, May Thawda Phoo, Yishu Foo
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Abstract
There is provided an optical sensing method, which includes obtaining a plurality of zero-reflection points (ZRPs) with overlapping conditions for s-polarization and p-polarization at a given value of interrogation variable, and sensing variations in amplitude ratio (Ψ) and phase difference (Δ) spectra of orthogonally polarized ZRPs at overlapping conditions, or alternative representations derived upon polarization changes.
Claims28
An optical sensing method, comprising:
- obtaining a plurality of zero-reflection points (ZRPs) with overlapping conditions for s-polarization and p-polarization at a given value of interrogation variable;
- and
- sensing variations in amplitude ratio (Ψ) and phase difference (Δ) spectra of orthogonally polarized ZRPs at overlapping conditions, or alternative representations derived upon polarization changes.
An optical sensor, comprising:
- a substrate for coupling light into surface plasmon polaritons;
- a first layer of plasmonic material on the substrate;
- a second layer of photonic material on the first layer;
- a third layer of plasmonic material on the second layer;
- and
- an outer layer exposed to external stimulus for sensing.
3 more elements
A method for fabricating an optical sensor, comprising:
- preparing a substrate;
- forming a multilayer stack on the substrate, the multilayer stack comprising a first layer of plasmonic material, a second layer of photonic material on the first layer, and a third layer of plasmonic material on the second layer;
- and
- forming an outer layer on the multilayer stack.
1 more element
Dependencies are inferred from the claim text.