Results 71 to 80 of about 8,784 (238)
Multi‐Module Micro/Nanorobots for Biomedical and Environmental Remediation Applications
Advanced Intelligent Systems, EarlyView.Multi‐module microrobots (MNRs) have overcome the limitations of single‐module systems by integrating components such as propeller, actuator, manipulator, and imaging modalities. They show promise in biomedical applications, such as targeted drug delivery and tissue repair, as well as in environmental remediation, including pollutant removal.
Bairong Zhu +4 more
wiley +1 more source
Geometric optics of whispering gallery modes [PDF]
, 2006 Quasiclassical approach and geometric optics allow to describe rather accurately whispering gallery modes in convex axisymmetric bodies. Using this approach we obtain practical formulas for the calculation of eigenfrequencies and radiative Q-factors in dielectrical spheroid and compare them with the known solutions for the particular cases and with ...
arxiv +1 more source
POSSIBILITY FOR FREQUENCY STABILIZATION OF MILLIMETER WAVELENGTH SOLID-STATE SOURCE BY A SCREENED DIELECTRIC RESONATOR [PDF]
Radio Physics and Radio Astronomy, 2016 Purpose: Showing the possibility in principle of the use of a screened dielectric resonator excited by the planar waveguide to stabilize the frequency of solid-state sources in the millimeter wavelength range.
A. E. Kogut +4 more
doaj +1 more source
Advanced Physics Research, EarlyView.The geometrical shaping of coumarin‐153 single crystals into next‐generation disc and ring resonators using Xe‐plasma FIB milling is demonstrated. Optimized beam parameters (30 kV, 100 pA/50 pA) enabled precise fabrication. This approach minimizes structural damage while ensuring high‐quality photonic traits.
Melchi Chosenyah +5 more
wiley +1 more source
Cylindrical Beam Propagation Modelling of Perturbed Whispering-Gallery Mode Microcavities [PDF]
arXiv, 2013 We simulate light propagation in perturbed whispering-gallery mode microcavities using a two-dimensional finite-difference beam prop- agation method in a cylindrical coordinate system. Optical properties of whispering-gallery microcavities perturbed by polystyrene nanobeads are investigated through this formulation.
arxiv
Brillouin Lasing with a CaF_2 Whispering Gallery Mode Resonator [PDF]
, 2008 Stimulated Brillouin scattering with both pump and Stokes beams in resonance with whispering gallery modes of an ultra high Q CaF_2 resonator is demonstrated for the first time. The resonator is pumped with 1064 nm light and has a Brillouin lasing threshold of 3.5 microwatt.
arxiv +1 more source
Shining a Light on the Future of Biophotonics
Journal of Biophotonics, EarlyView.ABSTRACT Biophotonics—the interdisciplinary fusion of light‐based technologies with biology and medicine—is rapidly transforming research, diagnostics, and therapy across various domains. This white paper, developed in conjunction with the International Congress on Biophotonics 2024, offers a comprehensive overview of the current landscape and future ...
Francesco Baldini +9 more
wiley +1 more source
Waveguide couplers for ferroelectric optical resonators [PDF]
arXiv, 2014 We report a study of using the same material to fabricate a whispering gallery mode resonator and a coupler. Coupling to high Q whispering gallery modes of the lithium niobate resonator is demonstrated by means of the titanium-doped waveguide. The waveguide coupling approach opens possibilities for simpler and wider practical usage of whispering ...
arxiv
Whispering gallery modes for a transmission problem [PDF]
arXiv, 2023 We construct a specific family of eigenfunctions for a Laplace operator with coefficients having a jump across an interface. These eigenfunctions have an exponential concentration arbitrarily close to the interface, and therefore could be considered as whispering gallery modes. The proof is based on an appropriate Agmon estimate.
arxiv
Collective Excitonic Assembly in Perovskite Superlattice
Laser &Photonics Reviews, EarlyView.Schematic depiction of CESF, illustrating that once the excitation laser density surpasses the threshold, the whispering gallery mode is initiated, resulting in the appearance of the CESF effect with an increase in collective dipole density. Time evolution of coherence properties under two‐beam excitation for delay times tD<0.1$t_D<0.1$ ps in CESF ...
Jiqing Tan +11 more
wiley +1 more source