Dynamic modulation of nonreciprocal absorption in a graphene-InAs hybrid structure under low magnetic field and small incident angles

Overcoming Kirchhoff's laws to achieve strong nonreciprocity enhances energy harvesting and thermal management. Current magneto-optical (MO) strategies need high magnetic excitation and large incident angles, hindering practicality. We designed a graphene-InAs hybrid for significant nonreciproc...

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Bibliographic Details
Published inOptics letters Vol. 50; no. 5; p. 1552
Main Authors Ming Qing, Ye, Liu, Jiao, Yang, Zhaoyan, Wei Wu, Liang, Gou, Yue, Wu, Jun, Li, Bingxiang
Format Journal Article
LanguageEnglish
Published United States 01.03.2025
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Summary:Overcoming Kirchhoff's laws to achieve strong nonreciprocity enhances energy harvesting and thermal management. Current magneto-optical (MO) strategies need high magnetic excitation and large incident angles, hindering practicality. We designed a graphene-InAs hybrid for significant nonreciprocity between absorptivity and emissivity at small angles with just 0.16 T, showing practical potential. By tuning graphene's Fermi energy, nonreciprocity strength can be adjusted via resonance mode competition. This design offers new insights for dynamic nonreciprocal radiation devices under near-normal light and modest magnetic excitation, facilitating practical use.
ISSN:1539-4794
DOI:10.1364/OL.553323