Work

Casimir radiation with Weyl semimetals

Year: 2025

Type: article

Abstract: When Casimir friction torque acts upon a rotated nanoparticle (NP), mechanical energy can be transformed into thermal energy, known as Casimir radiation, which significantly affects the thermal performance of nanoelectromechanical systems. In this work, we investigate Casimir radiation with nonreciprocal Weyl semimetal (WSM) NP levitated on a plate. WSM NP with inherent nonreciprocity has a radiative heat flux 27 times higher than NP with degenerate modes. The underlying physics is elucidated by the coupling and decoupling of the electromagnetic local density of states between nonreciprocal WSN NP and the plate in the near-field. The threefold localized plasmon modes of WSM NP split into localized circular modes with strong gyrotropic response, which opens up channels for Casimir radiation. This work provides a method for nanoscale energy conversion in NP systems.

Source: Physical Review Research

DOI: 10.1103/ldyf-753c

Authors: Yang Hu, Xiaohu Wu, Haotuo Liu, Mauro Antezza, Xiuquan Huang

Institutions: Northwestern Polytechnical University, Shandong Institute of Advanced Technology, Harbin University of Science and Technology, Institut Universitaire de France, Université de Montpellier

Language: English

Topic: Quantum Electrodynamics and Casimir Effect

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,625

Funders: National Natural Science Foundation of China, Natural Science Foundation of Shandong Province