Ultracompact resonator with high quality-factor based on a hybrid grating structure

Area of Science:

• Photonics and optical engineering
• Nanophotonics
• Resonant structures

Background:

• Conventional guided mode resonance (GMR) is a key phenomenon in photonic devices.
• Developing resonators with ultrahigh quality factors is crucial for advanced optical applications.
• Existing resonator designs face limitations in compactness and efficiency.

Purpose of the Study:

• To numerically investigate a novel hybrid grating structure as an ultrahigh quality factor resonator.
• To elucidate the unique physical mechanism behind the resonance in this hybrid structure.
• To assess the feasibility of fabricating the proposed resonator, considering fabrication errors and finite size effects.

Main Methods:

• Numerical simulations of the hybrid grating structure.
• Analysis of optical properties and resonance mechanisms.
• Investigation of the impact of fabrication imperfections and structural dimensions.

Main Results:

• The hybrid grating resonator exhibits an ultrahigh quality factor.
• The resonance mechanism differs significantly from conventional GMR.
• The structure shows potential for realizing ultracompact lasers with advantages over existing technologies.
• Feasibility analysis indicates potential for practical fabrication.

Conclusions:

• The hybrid grating structure represents a new class of optical resonators.
• Its unique resonance mechanism opens avenues for novel photonic device designs.
• The proposed resonator is a promising platform for next-generation ultracompact lasers.