Cavity-Enhanced Linear Dichroism in a van der Waals Antiferromagnet

Abstract

Optical birefringence is a fundamental optical property of crystals widely used for filtering and beam splitting of photons. Birefringent crystals concurrently possess the property of linear dichroism (LD) that allows asymmetric propagation or attenuation of light with two different polarizations. This property of LD has been widely studied from small molecules to polymers and crystals but has rarely been engineered per will. Here, we use the newly discovered spin-charge coupling in van der Waals antiferromagnetic (AFM) insulator FePS3 to induce large in-plane optical anisotropy and consequently LD. We report that the LD in this AFM insulator is tunable both spectrally and magnitude-wise as a function of cavity coupling. We demonstrate near-unity LD in the visible-near infrared range in cavity-coupled FePS3 crystals and derive its dispersion as a function of cavity length and FePS3 thickness. Our results hold wide implications for use of cavity tuned LD as a diagnostic probe for strongly correlated quantum materials as well as opens new opportunities for miniaturized, on-chip beam-splitters and tunable filters.

14 pages, 5 figures

References in corpus (5)

• Ising-Type Magnetic Ordering in Atomically Thin FePS3
• Suppression of magnetic ordering in XXZ-type antiferromagnetic monolayer NiPS3
• Linear magneto-electric phase in ultrathin MnPS${}_3$ probed by optical second harmonic generation
• Spin dynamics slowdown near the antiferromagnetic critical point in atomically thin FePS3
• Tuning the Néel temperature in an antiferromagnet: the case of NixCo1-xO microstructures

Cited by in corpus (11)

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• Progress and Prospects in Two-Dimensional Magnetism of van der Waals Materials
• Observation of giant surface second harmonic generation coupled to nematic orders in the van der Waals antiferromagnet FePS${}_3$
• Controlling the broadband enhanced light chirality with L-shaped dielectric metamaterials
• Ultrafast laser-induced spin-lattice dynamics in the van der Waals antiferromagnet CoPS3
• Observation of three-state nematicity and domain evolution in atomically-thin antiferromagnetic NiPS3
• Magnetic Exciton-Polariton with Strongly Coupled Atomic and Photonic Anisotropies
• Quantitatively predicting angle-resolved polarized Raman intensity of anisotropic layered materials
• Laser-induced Demagnetization in van der Waals $XY$- and Ising-like Antiferromagnets NiPS${}_3$ and FePS${}_3$
• Giant Magneto-Optical Schäfer-Hubert Effect in Two-Dimensional van der Waals Antiferromagnets \textit{M}PS${}_3$ (\textit{M}=Mn, Fe, Ni)
• Raman Forbidden Layer-Breathing Modes in Layered Semiconductor Materials Activated by Phonon and Optical Cavity Effects