Planar Polarization-Dichroic Lens and Mirror for Miniaturized Optical Devices
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Solution Overview
Problem
Current optical components are limited in terms of miniaturization, efficiency, cost, and functionality, particularly in achieving coinciding or spaced focal points for different polarizations of electromagnetic radiation, which is crucial for advanced applications like Fabry-Pérot cavities and fiber-integrated devices.
Innovation Solution
A planar optical device comprising a transparent substrate with a polarization-dichroic focusing lens and mirror, both made as planar nanostructures, which are designed to have different focusing powers for orthogonal polarizations, allowing for the creation of a Fabry-Pérot cavity and integration with optical fibers, utilizing dielectric metasurfaces and photonic crystals for precise phase and amplitude control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If traditional optical components are used, then functional performance is maintained, but device size and complexity increase
Solution Approach 1:
The patent combines multiple optical functions (focusing, polarization control, mirroring) into a single integrated planar device. The polarization-dichroic focusing lens and polarization-dichroic mirror are merged into one component that operates on different polarizations simultaneously, eliminating the need for separate optical elements and reducing overall device volume while maintaining functional complexity.
Solution Approach 2:
The invention transitions from traditional three-dimensional optical components to two-dimensional planar nanostructures. By using metasurfaces and photonic crystals in a planar configuration, the device achieves volumetric reduction while maintaining optical functionality through nanoscale patterning and phase control in the lateral dimensions.
2Adaptability or versatility
If conventional optical systems are used, then basic optical functions are achieved, but integration with optical fibers and miniaturization are limited
Solution Approach 1:
The patent employs thin film planar nanostructures (metasurfaces and photonic crystals) that can be directly mounted onto optical fiber tips. This thin-film configuration enables direct integration with optical fibers, allowing compact fiber-integrated devices while maintaining full optical functionality through the planar geometry that matches fiber端面 characteristics.
3Reliability
If standard optical components are used, then general optical performance is achieved, but photon-matter interaction efficiency is reduced
Solution Approach 1:
The patent implements spatially varying nanostructure geometries within the planar device to achieve different optical functions at different locations. The metasurface and photonic crystal patterns are locally optimized to provide position-dependent phase control, focusing, and polarization discrimination, enabling enhanced photon-matter interaction through localized field concentration without requiring complex bulk structures.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables efficient miniaturization and integration with optical fibers, enhancing photon-matter interaction for applications in laser physics, quantum technologies, and gas sensors by achieving high reflectivity and focusing efficiency for specific polarizations, thereby improving the performance of devices like all-optical switches and quantum sensing.
Implementation Method 1
a planar polarization-dichroic focusing lens covering the first face, the lens having a first focusing power for a first polarization of the electromagnetic radiation and a second focusing power for a second polarization of the electromagnetic radiation
Implementation Method 2
utilizing dielectric metasurfaces and photonic crystals for precise phase and amplitude control
Implementation Method 3
a planar polarization-dichroic mirror covering the second face, the mirror being reflective to the first polarization and transparent to the second polarization
Implementation Method 4
A Fabry-Pérot cavity can be formed using the optical device at one or both sides of the cavity
Data Source
AI summary
The optical device can comprise a substrate having a first face opposite a second face, a thickness between the first face and the second face, the first face and the second face being planar, the first face being parallel the second face, the substrate being transparent to an electromagnetic radiation in a given spectrum; a planar polarization-dichroic focusing lens covering the first face, the lens having a first focusing power for a first polarization of the electromagnetic radiation and a second focusing power for a second polarization of the electromagnetic radiation, the second focusing power being different from the first focusing power; and a planar polarization-dichroic mirror covering the second face, the mirror being reflective to the first polarization and transparent to the second polarization.