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Engineering strong coupling in ultra-compact photonic crystal/2D material platforms
Optics Express
|August 14, 2026
Summary
Sub-wavelength photonic crystals coupled with 2D materials enable tunable on-chip optoelectronics. Controlling photonic crystal geometry allows tailoring exciton-polariton coupling for novel devices.
Area of Science:
- Optoelectronics
- Materials Science
- Quantum Optics
Background:
- Photonic crystals (PhCs) coupled to 2D materials like transition metal dichalcogenides (TMDs) offer potential for advanced on-chip devices.
- Conventional microcavities have limitations; open PhC cavities present unique field profiles for tailored light-matter interactions.
Purpose of the Study:
- Investigate how PhC geometry controls exciton-polariton coupling and optical spectra.
- Explore the simultaneous weak and strong coupling regimes in PhC-TMD systems.
- Provide insights for designing ultra-compact, metal-free polaritonic devices.
Main Methods:
- Coupled-mode theory.
- Rigorous solutions to Maxwell's equations.
- Analysis of electric field profiles and exciton coupling.
Main Results:
- PhC geometry dictates spatial coupling regions within the unit cell.
- For large filling factors, PhC polaritons act as brightened dark waveguide modes.
- Spatially patterned TMDs reveal simultaneous weak and strong exciton coupling.
Conclusions:
- PhC geometry is key to controlling exciton-polariton dynamics in structured environments.
- This approach enables the design of highly tunable, room-temperature polaritonic devices.
- Offers a pathway for metal-free, ultra-compact optoelectronic applications.
