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Optical Concentrators with Simple Layered Designs.

Mohammad Mehdi Sadeghi¹, Lin Xu², Hamid Nadgaran³

¹1] College of Physics, Optoelectronics and Energy &Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, Jiangsu 215006, China [2] Department of Physics, Shiraz University, Shiraz 71454, Iran.

Scientific Reports

|June 16, 2015

Summary

This summary is machine-generated.

Researchers developed a new method for creating field concentrators using layered dielectric structures. This approach overcomes limitations of previous designs, enabling applications at higher frequencies like infrared and optical ranges.

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Area of Science:

Metamaterials and Nanophotonics
Electromagnetics and Optics

Background:

Transformation optics and Fabry-Pérot resonances enable field concentrator fabrication.
Perfect electric conductors limit designs to microwave frequencies, hindering optical applications.

Purpose of the Study:

To propose a novel design for field concentrators applicable to infrared and optical frequencies.
To demonstrate the feasibility of using layered dielectric structures with alternating positive and negative permittivities.

Main Methods:

Theoretical analysis of layered dielectric structures.
Numerical simulations to verify the concentrating effect.
Design utilizing two types of semiconductors.

Main Results:

Layered structures with alternating dielectrics can achieve field concentration.
The proposed design is practical and potentially manufacturable.
Simulations confirm the effectiveness of the proposed concentrator.

Conclusions:

Layered dielectric structures offer a viable alternative to perfect electric conductors for field concentrators.
This work extends the application of field concentrators to higher frequencies.
The suggested semiconductor-based design paves the way for advanced optical and infrared devices.