Nonreciprocal Thermal Radiation Based on Fibonacci Quasi-Periodic Structures

Jun Wu,1*

Feng Wu,2

Tiancheng Zhao,3

Han Zhai4 

Xiaohu Wu4

1Key Laboratory of Advanced Perception and Intelligent Control of High-end Equipment, Ministry of Education, College of Electrical Engineering, Anhui Polytechnic University, Wuhu, 241000, China

2School of Optoelectronic Engineering, Guangdong Polytechnic Normal University, Guangzhou 510665, China

3Beijing Aerospace Institute for Metrology and Measurement Technology, Beijing 100076, China

4Shandong Institute of Advanced Technology, Jinan 250100, China

*E-mail: [email protected], [email protected]

Abstract

To violate Kirchhoff’s law is very important in the areas of thermal radiation. However, due to the weak nonreciprocity in natural materials, it is necessary to engineer novel structures to break the balance between emission and absorption. In this work, we introduce magneto-optical material into Fibonacci photonic crystals. Assisted by the nonreciprocity of the magneto-optical material and the excitation of Tamm plasmon polaritons, strong nonreciprocal thermal radiation can be realized. The difference between absorption and emission at wavelength of 16 μm can reach 0.9 at the incident angle of 60o. The distributions of the magnetic field are also calculated to verify the underlying physical origin. By engineering the parameters of the structure, it is found that strong nonreciprocal thermal radiation can be achieved at shorter wavelength and smaller incident angle. The results indicate that the Fibonacci magnetophotonic crystals are the promising candidate to engineer the nonreciprocal emission for various requirements.

Nonreciprocal Thermal Radiation Based on Fibonacci Quasi-Periodic Structures