Resonantly absorbing one-dimensional photonic crystals

Area of Science:

• Optics and Photonics
• Condensed Matter Physics
• Quantum Optics

Background:

• Light wave propagation in periodic structures is fundamental to optics.
• Dissipative effects, such as atomic absorption, can significantly alter wave behavior.
• Photonic crystals and metamaterials exhibit unique band structures and optical properties.

Purpose of the Study:

• To theoretically describe the impact of dissipation on light propagation in multilayer periodic mirrors composed of resonant absorbing atoms.
• To investigate the formation of photonic and polaritonic gaps under varying lattice periodicities.
• To analyze the complex structure of Bloch gap modes influenced by atomic absorption line shapes and dissipation strength.

Main Methods:

• Development of a compact theoretical framework to model light-dissipation interactions.
• Analysis of the dependence of gap structures on lattice periodicity.
• Thorough study of Bloch gap mode behavior as a function of dissipation strength.

Main Results:

• Observation of ultranarrow photonic gaps, weak polaritonic gaps, and atypical gap structures.
• Demonstration that Bloch gap modes can acquire complex structures due to atomic absorption line shapes.
• Identification of conditions where Bloch gap modes may vanish with sufficiently strong dissipation.

Conclusions:

• Dissipation plays a crucial role in shaping the optical properties of periodic structures.
• The theoretical model provides insights into the behavior of light in dissipative photonic systems.
• The approach is applicable to various resonant absorbing systems, including excitonic resonances in photonic crystals.