Design of a Slab Tamm Plasmon Resonator Coupled to a Multistrip Array Waveguide for the Mid Infrared

Area of Science:

• Photonics and Optical Engineering
• Materials Science
• Nanotechnology

Background:

• Integrated optical devices require efficient light-matter interaction for sensing applications.
• Plasmonic resonators offer enhanced light confinement and absorption.
• Existing technologies like quantum cascade lasers can be complex and costly.

Purpose of the Study:

• To design and analyze a novel absorber-waveguide system for enhanced optical sensing.
• To integrate a coupled strip array (CSA) with a slab Tamm plasmon (STP) resonator.
• To explore the potential for cost-effective, on-chip optical sensing devices.

Main Methods:

• Designing a coupled strip array (CSA) waveguide.
• Coupling the CSA to a slab Tamm plasmon (STP) resonator.
• Utilizing a quasicrystal approach for STP resonator design with silicon and tungsten slabs.
• Analyzing system sensitivity based on slab thickness and field confinement.

Main Results:

• Achieved strong narrowband resonances with up to 85% emittance and Q-factors of 88.
• Demonstrated effective plasmon-enhanced resonant absorption and emission.
• Identified a crucial correlation between system sensitivity and field confinement within the silicon.

Conclusions:

• The proposed absorber-waveguide system offers a promising platform for highly sensitive optical sensing.
• The design provides a cost-effective alternative for on-chip integrated optical devices.
• Further optimization can enhance performance for applications in fluid and gas detection.