Giant optical anisotropy in transition metal dichalcogenides for next-generation photonics

Abstract

Large optical anisotropy observed in a broad spectral range is of paramount importance for efficient light manipulation in countless devices. Although a giant anisotropy was recently observed in the mid-infrared wavelength range, for visible and near-infrared spectral intervals, the problem remains acute with the highest reported birefringence values of 0.8 in BaTiS3 and h-BN crystals. This inspired an intensive search for giant optical anisotropy among natural and artificial materials. Here, we demonstrate that layered transition metal dichalcogenides (TMDCs) provide an answer to this quest owing to their fundamental differences between intralayer strong covalent bonding and weak interlayer van der Walls interaction. To do this, we carried out a correlative far- and near-field characterization validated by first-principle calculations that reveals an unprecedented birefringence of 1.5 in the infrared and 3 in the visible light for MoS2. Our findings demonstrate that this outstanding anisotropy allows for tackling the diffraction limit enabling an avenue for on-chip next-generation photonics.

20 pages, 5 figures

References in corpus (16)

• Gate-tuning of graphene plasmons revealed by infrared nano-imaging
• Optical nano-imaging of gate-tuneable graphene plasmons
• Magnetic light
• Individual nanoantennas empowered by bound states in the continuum for nonlinear photonics
• Photocarrier relaxation in two-dimensional semiconductors
• Magnetoelectric effects and valley controlled spin quantum gates in transition metal dichalcogenide bilayers
• Transition metal dichalcogenide nanodisks as high-index dielectric Mie nanoresonators
• Imaging exciton-polariton transport in MoSe2 waveguides
• Broad Spectral Tuning of Ultra-Low Loss Polaritons in a van der Waals Crystal by Intercalation
• Generalized 4 $\times$ 4 Matrix Formalism for Light Propagation in Anisotropic Stratified Media: Study of Surface Phonon Polaritons in Polar Dielectric Heterostructures
• Giant birefringence in optical antenna arrays with widely tailorable optical anisotropy
• Controlling evanescent waves using silicon photonic all-dielectric metamaterials for dense integration
• Infrared permittivity of the biaxial van der Waals semiconductor $\alpha$-MoO${}_3$ from near- and far-field correlative studies
• Transparent subdiffraction optics: nanoscale light confinement without metal
• Near-field Surface Waves in Few-Layer MoS2
• Layer degree of freedom for excitons in transition metal dichalcogenides

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