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Nonlinear opto-magnetic signuature of d-wave altermagnets
Lijun Yang, Long Liang
https://arxiv.org/abs/2509.08254 https://arxiv.org/pdf/2509.08254

Nonlinear opto-magnetic signuature of d-wave altermagnets
Altermagnetism, a recently discovered collinear magnetic order with net zero magnetization but exhibits spin-splitting band structure, has attracted much research interest due to the rich fundamental physics and possible applications. In this work, we investigate the opto-magnetic response of $d$-wave altermagnets, focusing on the inverse Cotton-Mouton effect--the induction of static magnetization via linearly polarized light. We find that the direction of the induced magnetization is determine…

Orbital Inverse Faraday and Cotton-Mouton Effects in Hall Fluids
Gabriel Cardoso, Erlend Sylju{\aa}sen, Alexander V. Balatsky
https://arxiv.org/abs/2508.01946 https://

Orbital Inverse Faraday and Cotton-Mouton Effects in Hall Fluids
We report two light-induced orbital magnetization effects in quantum Hall (QH) fluids, stemming from their transverse response. The first is a purely transverse contribution to the inverse Faraday effect (IFE), where circularly polarized light induces a DC magnetization by stirring the charged fluid. This contribution dominates the IFE in the QH regime. The second is the orbital inverse Cotton-Mouton effect (ICME), in which linearly polarized light generates a DC magnetization. Since the applie…