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We propose a new cancer treatment technique in which graphene nanoflakes and carbon nanotubes operate as a self-assembled cluster of spasers near cancer cells causing selective destruction of them by an amplified electric field.
We demonstrate how CMOS compatible photonic molecules (PM) can break the fundamental interdependence among quality factor (Q), channel spacing and size of microring resonators. Different PM architectures are presented for efficient and compact optical signal processing.
Kerr frequency comb generation in a MgF2 microresonator depends on the resonator temperature. This effect occurs as a consequence of change of local group velocity dispersion of the resonator spectrum resulting from linear interaction among resonator modes.
We demonstrated high-speed all-optical switching in a GaAs microdisk resonator using the tapered fiber pump probe technique. The optical transmission of the resonator was modulated with a time response of 43 ps.
We demonstrate field-programmable 2×2 optical switch based on resonance elimination through dielectric breakdown phenomenon on a high-quality multilayer platform (Si/SiO2/Si). Fabricated device exhibits an on/off extinction ratio of more than 20 dB for both routes.
We present in simulation a photonic neural circuit achieving a 200 ns spike delay, based on excitability in microrings. This type of delayline paves the way towards fully integrated optical spiking neural networks.
Resonant structures created along a thin capillary by nanoscale deformation of its surface can perform comprehensive sensing and manipulation of microfluids. The concept is illustrated with a model of triangular bottle resonator and floating microparticles.
We describe nanophotonic design approaches for broadband light management including i) crossed-trapezoidal Si structures ii) Si photonic crystal superlattices, and iii) tapered and inhomogeneous diameter III-V/Si nanowire arrays.
A novel platform for lithium-niobate-on-silicon photonics is developed. High-index-contrast submicron waveguides, microring resonators and optical modulators are demonstrated on the platform. The Y-cut lithium niobate Mach-Zehnder modulators have a record-low half-voltage length-product of 4 V-cm.
Laser-microcavity relative frequency fluctuations caused by thermal locking are studied. The locking of laser-microcavity detuning causes microcavity temperature fluctuations that transfer pump frequency noise onto the microcavity modes within the thermal locking bandwidth.
In this work we describe and present an analytic framework based on the extended boundary condition method capable of describing coupling between a high Q photonic resonator and a metal based nanoparticle supporting low Q plasmonic resonances. Approximate hybrid photonic-plasmonic resonance conditions are derived and the physical consequences of coupling explored.
The thermally-induced resonance shift produced by absorption of circulating light is studied theoretically and experimentally. Multiphysics finite element method modeling incorporating thermal and optical components is performed and verified using toroidal optical cavities.
We propose a novel approach for all optical RZ-to-NRZ conversion based on optical phase filtering. The proposed concept is experimentally validated through format conversion of a 640 Gbit/s coherent RZ signal to NRZ signal using a simple phase filter implemented by a commercial optical waveshaper.
We demonstrated NIR/MIR resonance behavior in optical antennas of comb-shaped split-ring resonators enabling substantially larger field enhancements than single/array of dipoles with the same side length, despite their simple architecture.
We present an electrodynamic model of strongly coupled metamaterial/intersubband-transition systems that can be used to predict and maximize Rabi splittings. This model can also be used to optimize metamaterial structures that enhance second-order nonlinear processes.
We present simulations and measurements examining moving boundary and photoelastic contributions to the optomechanical coupling rate in GaAs microdisks, and discuss nanobeam optomechanical crystal geometries with the potential for enhanced coupling rates.
Disorder and chaos are ubiquitous phenomena that are mostly unwanted in applications. On the contrary, they can be exploited to create a new technology. In this talk I will summarize my research in this field, discussing chaotic energy harvesting, nonlinear stochastic resonance and complex nanolasers.
Metasurface analogues of electromagnetically induced transparency and absorption are experimentally observed in near-field coupled subwavelength systems. Engineered with active control mechanisms, the unique resonances are promising in next-generation chip-scale terahertz photonic devices.
I present an integrated optomechanical platform based on polycrystalline diamond thin films. Free-standing resonators with high mechanical quality factors are excited both with gradient optical forces and through electrostatic actuation.
Optomechanical microcavities with high-frequency mechanical resonances facilitate experimental access to mechanical states with low phonon occupation and also hold promise for practical device applications including compact microwave sources. However, the weak radiation pressure force poses practical limits on achievable amplitudes at super high frequencies. Here, we demonstrate a piezoelectric force...
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