Theory for Twisted Bilayer Photonic Crystal Slabs

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Theory for Twisted Bilayer Photonic Crystal Slabs

Beicheng Lou, Nathan Zhao, Momchil Minkov, Cheng Guo, Meir Orenstein, and Shanhui Fan

Phys. Rev. Lett. 126, 136101 – Published 31 March 2021

Abstract

We analyze scattering properties of twisted bilayer photonic crystal slabs through a high-dimensional plane wave expansion method. The method is applicable for arbitrary twist angles and does not suffer from the limitations of the commonly used supercell approximation. We show strongly tunable resonance properties of this system which can be accounted for semianalytically from a correspondence relation to a simpler structure. We also observe strongly tunable resonant chiral behavior in this system. Our work provides the theoretical foundation for predicting and understanding the rich optical physics of twisted multilayer photonic crystal systems.

Received 21 October 2020
Accepted 3 March 2021

DOI:https://doi.org/10.1103/PhysRevLett.126.136101

Physics Subject Headings (PhySH)

Nanophotonics

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Beicheng Lou ^1,*, Nathan Zhao¹, Momchil Minkov², Cheng Guo¹, Meir Orenstein³, and Shanhui Fan^2,†

¹Department of Applied Physics, and Ginzton Laboratory, Stanford University, Stanford, California 94305, USA
²Department of Electrical Engineering, and Ginzton Laboratory, Stanford University, Stanford, California 94305, USA
³The Andrew and Erna Viterbi Faculty of Electrical Engineering, Technion, Haifa 32000, Israel