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Angle-tolerant hybrid plasmonic filters for visible light communications
Applied Optics
|February 4, 2017
Summary
This study introduces a novel hybrid plasmonic-transmission blue filter for visible light communication. The design offers excellent performance and tolerance to angle variations at low cost.
Area of Science:
- Optoelectronics
- Materials Science
- Photonics
Background:
- Visible light communication (VLC) systems require efficient blue filters.
- Yellow phosphor-coated blue light-emitting diodes (LEDs) are common in VLC.
- Existing filters face challenges in balancing performance, angle tolerance, and cost.
Purpose of the Study:
- To propose a novel hybrid plasmonic-transmission blue filter for VLC systems.
- To optimize the filter for high transmission and wide angle of incidence (AOI) tolerance.
- To achieve a low-cost, low-complexity design.
Main Methods:
- Utilized quasi-plasmon mode excitation in a silver and titanium dioxide layered structure.
- Employed a needle optimization technique for performance enhancement.
- Simulated filter performance under various angles of incidence and fabrication variations.
Main Results:
- Achieved insertion loss of ~1 dB over 400-485 nm spectral range.
- Demonstrated minimal polarization-dependent loss for AOI up to ~50°.
- Evaluated filter tolerance to ±10% thickness variations in layers.
Conclusions:
- The proposed hybrid plasmonic-transmission filter offers a promising solution for VLC.
- The design effectively balances transmission, angle tolerance, and cost.
- The filter shows robustness against fabrication errors.
