A5002611349- Laser-Plasma Interactions and Diagnostics
- Metamaterials and Metasurfaces Applications
- Plasmonic and Surface Plasmon Research
- Laser-induced spectroscopy and plasma
- Laser-Matter Interactions and Applications
- Photonic Crystals and Applications
- Photonic and Optical Devices
- Advanced Antenna and Metasurface Technologies
- Magnetic confinement fusion research
- Topological Materials and Phenomena
- Particle accelerators and beam dynamics
- Advanced Fiber Laser Technologies
- Gold and Silver Nanoparticles Synthesis and Applications
- Laser Design and Applications
- Thermal Radiation and Cooling Technologies
- Particle Accelerators and Free-Electron Lasers
- Orbital Angular Momentum in Optics
- Gyrotron and Vacuum Electronics Research
- Spectroscopy Techniques in Biomedical and Chemical Research
- Atomic and Molecular Physics
- Plasma Diagnostics and Applications
- High-pressure geophysics and materials
- Quantum optics and atomic interactions
- Optical Coatings and Gratings
- Neural Networks and Reservoir Computing
Cornell University
2016-2025
The University of Texas at Austin
2010-2022
Zhejiang University
2022
Nanyang Technological University
2022
Ithaca College
2019-2022
ORCID
2020
Lomonosov Moscow State University
2020
Peter the Great St. Petersburg Polytechnic University
2020
United States Air Force Research Laboratory
2018
Fusion Academy
2005-2017
Optical Nanoengineering Optics and electronics operate at very different length scales. Surface plasmons are light-induced electronic excitations that being pursued as a route to bridge the scales bring processing speed offered by optical communication down size of chip circuitry. Now, Fan et al. (p. 1135 ) describe self-assembly nanoscale dielectric particles coated with gold. Functionalization gold surface polymer ligands allowed controlled production clusters nanoparticles. The properties...
A nanolaser is a key component for on-chip optical communications and computing systems. Here, we report on the low-threshold, continuous-wave operation of subdiffraction based surface plasmon amplification by stimulated emission radiation. The plasmonic nanocavity formed between an atomically smooth epitaxial silver film single optically pumped nanorod consisting gallium nitride shell indium core acting as gain medium. atomic smoothness metallic crucial reducing modal volume losses. Bimodal...
An all-Si photonic structure emulating the quantum-valley-Hall effect is proposed. We show that it acts as a topological insulator (PTI), and an interface between two such PTIs can support edge states are free from scattering. The conservation of valley degree freedom enables efficient in- out-coupling light space structure. protection waves be utilized for designing arrays resonant time- delay cavities do not suffer reflections cross-talk.
The wave nature of light limits the spatial resolution in classical microscopy to about half illumination wavelength. Recently, a new approach capable achieving subwavelength resolution, called superlensing, was invented, challenging already established method scanning near-field optical (SNOM). We combine advantages both techniques and demonstrate novel imaging system where objects no longer need be close proximity probe, allowing for subsurface at sub-wavelength-scale lateral resolution.
We introduce an ultrasensitive label-free detection technique based on asymmetric Fano resonances in plasmonic nanoholes with far reaching implications for point-of-care diagnostics. By exploiting extraordinary light transmission phenomena through high-quality factor (Q(solution) ∼ 200) subradiant dark modes, we experimentally demonstrate record high figures of merits (FOMs as 162) intrinsic limits surpassing that the gold standard prism coupled surface-plasmon sensors (Kretschmann...
A metamaterial-based approach in making a wide-angle absorber of infrared radiation is described. The technique based on an anisotropic perfectly impedance-matched negative-index material (PIMNIM). It shown analytically that PIMNIM subwavelength all three dimensions enables absorption close to 100% for incidence angles up $45\ifmmode^\circ\else\textdegree\fi{}$ the normal. specific implementation such frequency-tunable plasmonic metamaterials presented. Applications imaging and coherent...
We present the concept of a solar thermo-photovoltaic (STPV) collection system based on large-area, nanoimprint-patterned film plasmonic structures acting as an integrated absorber/narrow-band thermal emitter (SANTE). The SANTE is integrating broad-band radiation absorption with selective narrow-band IR which can be efficiently coupled to photovoltaic (PV) cell for power generation. By employing low reflectivity refractory metal (e.g., tungsten) material, we demonstrate that spectrum...
Assemblies of strongly interacting metallic nanoparticles are the basis for plasmonic nanostructure engineering. We demonstrate that clusters four identical spherical particles self-assembled into a close-packed asymmetric quadrumer support strong Fano-like interference. This feature is highly sensitive to polarization incident electric field due orientation-dependent coupling between in cluster. structure demonstrates how careful design colloidal systems can lead creation new modes and...
The wave nature of radiation prevents its reflections-free propagation around sharp corners. We demonstrate that a simple photonic structure based on periodic array metallic cylinders attached to one the two confining metal plates can emulate spin-orbit interaction through bianisotropy. Such metawaveguide behaves as topological insulator with complete band gap. An interface between such structures opposite signs bianisotropy supports topologically protected surface waves, which be guided...
A simple metamaterial-based wide-angle plasmonic absorber is introduced, fabricated, and experimentally characterized using angle-resolved infrared spectroscopy. The metamaterials are prepared by nano-imprint lithography, an attractive low-cost technology for making large-area samples. matching of the metamaterial's impedance to that vacuum responsible observed spectrally selective ``perfect'' absorption light. theoretically calculated in single-resonance approximation, resonance identified...
We propose a concept of low-symmetry three-dimensional metamaterial exhibiting double-continuum Fano (DCF) optical resonance. Such is described as birefringent medium supporting discrete dark electromagnetic state weakly coupled to the continua two nondegenerate bright bands orthogonal polarizations. It demonstrated that light propagation through such DCF can be slowed down over broad frequency range when parameters (e.g., mode) are adiabatically changed along path. Using specific...
Polycrystalline graphene grown by chemical vapor deposition (CVD) on metals and transferred onto arbitrary substrates has line defects disruptions such as wrinkles, ripples, folding that adversely affect transport properties through the scattering of charge carriers. It is found assembled with metal nanowires (NWs) dramatically decreases resistance films. Graphene/NW films a sheet comparable to intrinsic have been obtained tested transparent electrode replacing indium tin oxide in...
Graphene is widely known for its anomalously strong broadband optical absorptivity of 2.3% that enables seeing single-atom layer with the naked eye. However, in mid-infrared part spectrum graphene represents a quintessential lossless zero-volume plasmonic material. We experimentally demonstrate that, when integrated Fano-resonant metasurfaces, single-layer (SLG) can be used to tune their response. SLG's response shown induce large blue shifts metasurface's resonance without reducing spectral...
Graphene has emerged as a promising optoelectronic material because its optical properties can be rapidly and dramatically changed using electric gating. Graphene’s weak response, especially in the infrared part of spectrum, remains key challenge to developing practical graphene-based devices such modulators, detectors, tunable reflect-arrays. Here it is experimentally theoretically demonstrated that plasmonic metasurface with two Fano resonances enhance interaction light single layer...
Abstract Optical activity and circular dichroism are fascinating physical phenomena originating from the interaction of light with chiral molecules or other nano objects lacking mirror symmetries in three-dimensional (3D) space. While optical properties weak most naturally occurring materials, they can be engineered significantly enhanced synthetic media known as metamaterials, where spatial symmetry their building blocks is broken on a nanoscale. Although originally discovered 3D...
Compact varifocal lenses are essential to various imaging and vision technologies. However, existing elements typically rely on mechanically actuated systems with limited tuning speeds scalability. Here, an ultrathin electrically controlled lens based a liquid crystal (LC) encapsulated dielectric metasurface is demonstrated. Enabled by the field-dependent LC anisotropy, applying voltage bias across cell modifies local phase response of silicon meta-atoms, in turn modifying metalens focal...
An initially short ( $<1/{\ensuremath{\omega}}_{p}$) laser pulse can be superradiantly amplified by a counterpropagating long low-intensity pump while remaining ultrashort. This superradiant amplification occurs if the frequency of is lower than that pump, and initial intensity sufficiently high. Numerical simulations indicate to an hundreds times intensity, with depletion as high $40%$. implies efficiently time compressed without chirping stretching, making interesting alternative...