Few-layer metamaterials for a spontaneous emission enhancement

Area of Science:

• Materials Science
• Optics
• Quantum Physics

Background:

• Multilayer hyperbolic metamaterials are crucial for enhancing spontaneous emission.
• Achieving tunable Purcell effect typically requires dozens of layers.

Purpose of the Study:

• To investigate the impact of layer number and thickness on the Purcell effect in multilayer hyperbolic metamaterials.
• To identify optimal designs for enhanced spontaneous emission.

Main Methods:

• Numerical calculations were performed on multilayer structures with varying numbers and thicknesses of metal and dielectric layers.
• Analysis focused on reflection coefficients and surface plasmon polariton modes.

Main Results:

• Multilayers with fewer and thinner layers demonstrated superior performance in enhancing the Purcell effect.
• Increased layer numbers negatively impacted the imaginary part of the reflection coefficient.
• Thinner metal layers facilitated stronger coupling of surface plasmon polariton modes.

Conclusions:

• The study reveals that reduced layer count and thickness optimize spontaneous emission enhancement in hyperbolic metamaterials.
• Findings offer fundamental insights for designing efficient optical metamaterials.
• Provides a practical guide for enhancing local density of optical states.