Si-Cylinder Arrays on InAs for Electromagnetic Nonreciprocal Radiation With 0.5 T Magnetic Field and 3° Angle

In recent years, nonreciprocity of nonequilibrium radiation has demonstrated significant possibility for practical value, where the nonreciprocal radiation has successfully mitigated the limitations imposed by Kirchhoff’s law. In this study, we investigate the pronounced nonreciprocal radiation characteristics of a dual-polarized silicon cylindrical array under low magnetic field and small angle. The array structure consists of multiple layers: a silicon cylindrical layer, a silicon rectangular layer, an InAs layer, and an Ag rectangular layer. This unique configuration enables the exploration of novel radiation phenomena in the weak external magnetic field and less angle. By investigating the physical mechanisms governing electromagnetic field energy distribution, we have achieved a nonreciprocity exceeding 90% between TE polarization and TM polarization in radiation. This remarkable result is obtained at low magnetic fields, specifically at an intensity of 0.5 T and an angle of 3°. In contrast to conventional nonreciprocal radiation structures, this study significantly diminishes reliance on external magnetic fields and incidence angles. It is anticipated that it will offer fresh perspectives and innovative approaches in the field of nonreciprocal radiation and energy transfer research.