Strong dual-band nonreciprocal radiation based on a four-part periodic metal grating

Strong Nonreciprocal Mid-infrared Radiation at Small Angles Based on the Excitation of Guided Modes

“…[6][7][8]36] Only recently, some researches had been proposed to realize strong nonreciprocal radiation around 30°. [23,[37][38][39][40] However, these structures usually suffer from low nonreciprocity (less than 0.9), [23] large size [37,38] along with not small enough incident angle (larger than 25 o ). [23,[37][38][39][40] Therefore, the key innovation of this work is that a nonreciprocity as large as 0.911 is achieved at an incident angle of only 12° along with a simple structure, which superiors to the schemes proposed in previous works.…”

A multi-band nonreciprocal thermal emitter involving a Weyl semimetal with a Thue–Morse multilayer

“…The proposed structure includes one-dimensional periodic grating, 11,12,17 prism coupled film structures, 16 multilayer structures, [20][21][22] and the epsilon-nearzero structure. 23 Soon afterwards, new concepts, such as the tunable nonreciprocal radiation 24 and dual-band nonreciprocal radiation, 25,26 have been proposed and investigated. However, the scheme mentioned above can only be operated by using an applied magnetic field, and the real application of these thermal emitters inevitably suffers from this limitation.…”

Tunable near-perfect nonreciprocal radiation with a Weyl semimetal and graphene

“…9 InAs, as a typical MO medium, can only be used with an external magnetic field. Since the first incorporation of InAs into nonreciprocal radiation, various different structures, such as subwavelength grating structures based on guided mode resonance, 15,20,21 prism coupled InAs planar structure via attenuated total reflection, 14 periodic, Fibonacci quasi-periodic and Thue-morse aperiodic InAs-dielectric multilayers along with heterostructures based on Tamm plasmon polaritons, [22][23][24][25] and epsilon-near-zero InAs planar structures in the bound state in continuum, 26 have been designed to achieve near-complete nonreciprocal radiation with above 0.9 nonreciprocity. However, such a nonreciprocal thermal emitter can only be operated under a large applied magnetic field, which may limit its potential in real applications where a large magnetic field is difficult to achieve.…”