A5039113843- Plasmonic and Surface Plasmon Research
- Thermal Radiation and Cooling Technologies
- Metamaterials and Metasurfaces Applications
- Fatigue and fracture mechanics
- Strong Light-Matter Interactions
- Engineering Structural Analysis Methods
- Photonic and Optical Devices
- Mechanical and Optical Resonators
- Advanced Antenna and Metasurface Technologies
- Mechanical stress and fatigue analysis
- Metal Forming Simulation Techniques
- Antenna Design and Analysis
- Metallurgy and Material Forming
- Near-Field Optical Microscopy
- Advanced Fiber Laser Technologies
- Photonic Crystals and Applications
- Terahertz technology and applications
- Non-Destructive Testing Techniques
- High-Velocity Impact and Material Behavior
- Phase-change materials and chalcogenides
- Structural Integrity and Reliability Analysis
- Transition Metal Oxide Nanomaterials
- 2D Materials and Applications
- Conducting polymers and applications
- Mechanical Behavior of Composites
CIC nanoGUNE
2016-2025
Central South University of Forestry and Technology
2025
Central South University
2025
University of Jinan
2023-2025
Wuhan National Laboratory for Optoelectronics
2020-2024
Huazhong University of Science and Technology
2020-2024
Yangtze Optical Electronic (China)
2024
Nanchang University
2024
Xidian University
2023
Shanghai Jiao Tong University
2023
Optical imaging beyond the diffraction limit was one of primary motivations for negative-index metamaterials, resulting in Pendry's perfect lens and more attainable superlens. While these approaches offer sub-diffractional resolution, they do not provide a mechanism magnification image. Hyperbolic (or indefinite-permittivity) metamaterials have been theoretically considered experimentally demonstrated to simultaneously subdiffractive magnification; however, are plagued with low efficiency...
Patterning a hyperbolic metasurface Structured metasurfaces potentially enable the control of propagation direction excitations on material's surface. However, high losses associated with materials used to date has led relatively short lifetimes for excitations. Li et al. patterned subwavelength grating into layer hexagonal boron nitride (hBN) and found that lifetime length could be much longer. Direct imaging polariton illustrates hBN can viable platform nanophotonic circuits. Science ,...
Enhanced light-matter interactions are the basis of surface enhanced infrared absorption (SEIRA) spectroscopy, and conventionally rely on plasmonic materials their capability to focus light nanoscale spot sizes. Phonon polariton nanoresonators made polar crystals could represent an interesting alternative, since they exhibit large quality factors, which go far beyond those counterparts. The recent emergence van der Waals enables fabrication high-quality nanophotonic resonators based phonon...
Control over charge carrier density provides an efficient way to trigger phase transitions and modulate the optoelectronic properties of materials. This approach can also be used induce topological in optical response photonic systems. Here we report a transition isofrequency dispersion contours hybrid polaritons supported by two-dimensional heterostructure consisting graphene α-phase molybdenum trioxide. By chemically changing doping level graphene, observed that topology polariton surfaces...
Negative refraction provides an attractive platform to manipulate mid-infrared and terahertz radiation for molecular sensing thermal applications. However, its implementation based on available metamaterials plasmonic media presents challenges associated with optical losses, limited spatial confinement, lack of active tunability in this spectral range. Here, we demonstrate gate-tunable negative at frequencies using hybrid topological polaritons van der Waals heterostructures high...
Abstract Polaritons in layered materials—including van der Waals materials—exhibit hyperbolic dispersion and strong field confinement, which makes them highly attractive for applications including optical nanofocusing, sensing control of spontaneous emission. Here we report a near-field study polaritonic Fabry–Perot resonances linear antennas made material. Specifically, phonon–polaritons rectangular waveguide hexagonal boron nitride (h-BN, prototypical crystal). Infrared nanospectroscopy...
A conventional thermal emitter exhibits a broad emission spectrum with peak wavelength depending upon the operation temperature. Recently, narrowband was realized periodic gratings or single microstructures of polar crystals supporting distinct optical modes. Here, we exploit coupling adjacent phonon-polaritonic nanostructures, demonstrating experimentally that nanometer-scale gaps can control frequency while retaining line widths as narrow 10 cm–1. This achieved by using deeply...
Plasmonic antennas are crucial components for nano-optics and have been extensively used to enhance sensing, spectroscopy, light emission, photodetection, others. Recently, there is a trend search new plasmonic materials with low intrinsic loss at plasmon frequencies. As an alternative metals, polar crystals negative real part of permittivity in the Reststrahlen band support surface phonon polaritons (SPhPs) weak damping. Here, we experimentally demonstrate resonance single circular...
Polaritons, coupled excitations of photons and dipolar matter excitations, can propagate along anisotropic metasurfaces with either hyperbolic or elliptical dispersion. At the transition from to dispersion (corresponding a topological transition), various intriguing phenomena are found, such as an enhancement photonic density states, polariton canalization hyperlensing. Here we investigate theoretically experimentally polaritonic coupling deeply subwavelength elements in uniaxial...
Launching and manipulation of polaritons in van der Waals materials offers novel opportunities for field-enhanced molecular spectroscopy photodetection, among other applications. Particularly, the highly confined hyperbolic phonon (HPhPs) h-BN slabs attract growing interest their capability guiding light at nanoscale. An efficient coupling between free space photons HPhPs is, however, hampered by large momentum mismatch. Here, we show -by far-field infrared spectroscopy, nanoimaging...
Plasmon polaritons in topological insulators attract attention from a fundamental perspective and for potential THz photonic applications. Although have been observed by far-field spectroscopy on insulator microstructures, real-space imaging of propagating has elusive so far. Here, we show spectroscopic near-field images thin Bi2Se3 layers (prototypical insulators) revealing with up to 12 times increased momenta as compared photons the same energy decay about 0.48 ps, yet short propagation...
Abstract Polaritons are quasi-particles that combine light with matter, enabling precise control of at deep subwavelength scales. The excitation and propagation polaritons closely linked to the structural symmetries host materials, resulting in symmetrical polariton high-symmetry materials. However, low-symmetry crystals, symmetry-broken exist, exhibiting enhanced directionality for nanoscale manipulation steering. Here, we theoretically propose experimentally demonstrate existence...
Graphene as a one-atom-thick planar sheet can support surface plasmons at infrared (IR) and terahertz (THz) frequencies, opening up exciting possibilities for the emerging research field of graphene plasmonics. Here, we theoretically report that layered graphene-lens (GL) enables enhancement evanescent waves near-field subdiffractive imaging. Compared to other resonant imaging devices like superlenses, nonresonant operation GL provides advantages broad intrinsic bandwidth low sensitivity...
Mid-infrared (MIR) photonics demands highly confined optical fields to obtain efficient interaction between long-wavelength light and nanomaterials. Surface polaritons excited on polar semiconductor metallic material interfaces exhibit near-fields localized subwavelength scales. However, realizing a stronger field concentration in cavity with high quality ( Q) factor small mode volume is still challenging the MIR region. This study reports of surface phonon (SPhPs) using planar circular...