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We report on the formation of hexagonal polariton patterns in double semiconductor microcavities operating in the OPO regime. We experimentally and theoretically demonstrate both the formation and the optical control of these patterns.
We present the first experimental observation of a Floquet Topological Insulator in any physical system. We realize optical topologically-protected unidirectional edge states, without magnetic fields, using honeycomb photonic lattice of helical waveguides.
Despite unique and fascinating capability in subwavelength optics, active control of optical plasmon resonance has been hampered by drastically weak optical response of free carriers at optical frequency. We demonstrate efficient control of optical plasmon resonance in gold nanorod with graphene by electrical gating.
We show theoretically that large modulation of the amplitude and phase of mid-infrared light can be achieved by dynamically shifting the resonance of graphene-metal plasmonic antennas via electrical tuning of the optical conductivity of graphene.
We extend the time-transformation technique to include the delayed Raman response and apply it to study the impact of the width of few-cycle optical pulses on intrapulse Raman scattering and dispersive wave generation.
We investigate bio-inspired plasmonic sensors based on the interactions between Ag nanoparticles and diatom biosilica. The strongly coupled optical resonances lead to 2× higher optical extinction and 4∼6× improvement of sensitivity in surface-enhanced Raman scattering.
Position-dependent diffusion of light is observed experimentally in quasi-two-dimensional disordered optical waveguides. Strong wave interference effects make the diffusion coefficient depend on the size and shape of the random medium as well as the dissipation.
We report the first demonstration of a broadband optical isolation using a Silicon nanowaveguide via Bragg scattering four-wave mixing. We achieve an isolation ratio of 4 dB over a bandwidth of 8 nm.
We show enhancement in optical nonlinear absorption by engineering the coupling between excitons of 3,4,7,8-naphthalenetetracarboxylic dianhydride (NTCDA) and ZnO nanowires. Energy transfer between the excitonic systems and exciton scattering are found to be competing processes.
Anomalous gain enhancement was observed in thin indium tin oxide-, zinc selenide-coated, and uncoated Fe-doped lithium niobate (Fe:LN) slabs. Coating dependent strong scattering near the surface normal was also observed and investigated in these slabs. The correlation between mid-wave IR oscillation and gain and the enhancement of the scattering near surface normal was evidenced in several supported...
Precise and agile manipulation of frequency and phase of output signals of single-frequency optical frequency synthesizers based on a novel technique for frequency shifting of frequency combs is investigated by relative measurements between identical synthesizers.
We report real time detection of individual nanoparticles down to R=20 nm using a high-Q whispering gallery mode (WGM) microresonator. The detection is based on resonance enhanced particle induced reflection and does not require monitoring resonance spectra.
An as yet unexploited Magneto Optical Kerr Effect (MOKE) at evanescent distance from a surface is introduced. In the case of a magnetic particle-metallic surface system, an extraordinary intensity is discovered and fully explained by the excitation of Surface Plasmon Polariton.
Using scanning probe microscopy with modulated illumination, we demonstrate simultaneous measurement of topography and optical forces exerted on a probe. Broadband optical field detection is possible using a single probe.
We show how transformation optics can enhance optical forces between two optical waveguides by several orders of magnitude by altering the perceived distance between the waveguides. This transformation can be implemented using single-negative metamaterial films.
We propose a distorted optical waveguide around a microsphere to mimic curved spacetimes caused by the “gravitational fields”. Gravitational lensing effects analogues are experimentally demonstrated and this can be used to prospective light harvesting.
We present spectra evolution of photonic molecules upon individual or collective coupling of supermodes in one resonator with single mode in the other one by tuning the coupling strength and spectral overlap of the modes.
We report observation of x-ray and optical sum frequency generation. An ultrafast optical pulse drives charge oscillations to the chemical bonds in diamond. A co-propagating x-ray pulse probes the accompanying atomic-scale chemical bond distortion.
We demonstrate that a subwavelength plasmonic metamolecule consisting of four nanoparticles supports a magnetic response spectrally overlapped with the electric dipole resonance. Small structural asymmetries lead to interference and thus a Fano resonance in scattering.
We demonstrate for the first time that paraxial beams can exert long range optical pulling forces on objects at soft interfaces due to the increase of linear momentum of light in higher index dielectrics.
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