The Purcell effect of a nanoshell dimer on the fluorescence single molecule placed within dimer's gap is studied. numerical results show that acts as an antenna, making energy transfer from excited to more efficient, and lowpass filter for radiation far field. Moreover, enhancement factor much higher than solid Au in longer-wavelength regime.

This study theoretically investigates the wavelength-dependent longitudinal polarizability of a gold nanorod (GNR) irradiated by polarized laser beam. The resultant optical torque in terms Maxwell stress tensor was analyzed quantitatively using multiple multipole method. Our results indicate that real part GNR can be either positive or negative, leading to parallel perpendicular modes, respectively. For and long axis is rotated align perpendicular, respectively, polarization direction...

The wavelength-dependent optical torques provided by a circularly polarized (CP) plane wave driving Au nanorod (NR) and nanowire (NW) to rotate constantly were studied theoretically. Using the multiple multipole method, resultant torque in terms of Maxwell's stress tensor was analyzed. Numerical results show that spectrum is accordance with absorption NR/NW. Under same fluence, maximum occurs at longitudinal surface plasmon resonance (LSPR) NR/NW, accompanied severe plasmonic heating....

This paper presents the results of measuring Rayleigh wave as well longitudinal velocities in a concrete specimen using transient elastic waves. The surface generated by steel ball impact on material is studied detail and then method for determination velocity based cross-correlation proposed. determined wavefront arrival wave. A special triggering device accurate time origin utilized. measured both are good agreement with those utilizing conventional ultrasonic method. It noted that...

This study theoretically investigates Fano resonances and dips of an Au-SiO2-Au nanomatryoshka that is excited by a nearby electric dipole. An analytical solution dyadic Green's functions used to analyze the radiative nonradiative power spectra radial dipole in proximity nanomatryoshka. From these spectra, plasmon modes accompany are identified. In addition, scattering absorption illuminated plane wave investigated confirm dips. Our results reveal dip splits each quadrupole into bonding...

The coupling plasmon of a hybrid nanostructure, silver island (SI) associated with nanoparticle (SNP), on metal-enhanced fluorescence (MEF) was studied theoretically. We used the multiple multipole method to analyze plasmon-mediated enhancement factor molecule immobilized SNP and located in gap zone between SI SNP; herein, modeled as an oblate spheroid. Numerical results show that nanostructure is higher than or alone due coupled mode. This finding agreement previous experimental results. In...

Abstract Surface plasmon resonance (SPR) of a single metallic nanoparticle is analyzed and simulated via multi-multipole method for 3D problems. The excitation, at optical frequencies, the SPR leads to an extremely strong field in vicinity nanoparticle. Numerical results indicate that red shift induced ellipsoidal nanoparticle, compared spherical one. Two structures core-shelled nanoparticles are also studied; one nanosphere Ag shell with oxide core, other core (ZrO2 or SiO2). illustrate...

<para xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> The effect of oxygen incorporation on microstructure and media performance in CoCrPt–SiO<formula formulatype="inline"><tex>$_{2}$</tex></formula> films with various contents (OC) from 3 to 10 at% at different film thicknesses (<emphasis emphasistype="italic">t</emphasis><formula formulatype="inline"><tex>$_{\rm MAG}$</tex></formula>) 2 27 nm is investigated. Nonuniform less grain isolation close...

3D optical vortex trapping upon a polystyrene nanoparticle (NP) by 1D gold dimer array is studied theoretically. The force field shows that the mode can be contact or non-contact. For former, NP attracted toward corresponding dimer. latter, it trapped stagnation point of zero with spiral trajectory, revealing vortex. Additionally torque causes to transversely spin, even though system irradiated linearly polarized light. transverse spin-orbit interaction manifested from opposite helicities...

Strain effects on optical properties of self-assembled InAs/GaAs quantum dots grown by epitaxy are investigated. Since a capping layer is added after the self-assembly process dots, it might be reasonable to assume that neither experiences nor affects induced deformation during process. A new two-step model proposed analyse three-dimensional strain fields dots. The based theory linear elasticity and takes into account sequence fabrication In first step, heterostructure system without...

Magnetic switching behavior for CoCrPt–SiO2 single layer media with oxygen contents (OCs) from 4% to 10% and recording thickness (tmag) 2to27nm is investigated. Significant incoherent switching, caused by domain wall motion, large activation volume are observed at tmag⩽6nm regardless of OC, consistent nonuniform microstructure less grain isolation tmag=4nm. These results support formation a highly exchange-coupled thin magnetic on top Ru interlayer, which can explain the difference between...

Average enhancement factor (AEF) of a coreshell (Ag@SiO(2)) on the fluorescence molecules doped within silica shell is proposed and studied to estimate overall performance large number coreshells. Using Mie theory dyadic Green's functions, (EF) first calculated for any arbitrarily oriented located electric dipole embedded in shell. AEF then obtained by averaging individual EF over all possible orientations positions dipoles. FITC-doped (radius Ag core: 25 nm, thickness shell: 15 nm)...

The plasmon-enhanced spin and orbital rotation of Au dimer, two optically bound nanoparticles (NPs), induced by a circularly polarized (CP) light (plane wave or Gaussian beam) were studied theoretically. Through the optomechanical performances optical forces torques, longitudinal/transverse spin-orbit coupling (SOC) twisted electromagnetic fields was investigated. show that for long-range interaction, there exist some stable-equilibrium orbits rotation, where interparticle distances are...

The surface plasmon polaritons (SPPs) of higher-order mode propagating along a plasmonic nanowire (NW) or an elongated nanorod (NR) are studied theoretically. dispersion relations SPPs in NWs different radii, obtained from transcendental equation, show that the propagation lengths 1 and 2 at specific frequency longer than 0. For mode, spatial phase longitudinal component electric field cross section NW exhibits topological singularity, which indicates optical vortex. Of importance,...

In this work, we studied the initiated plasmonic nanobubbles and follow-up microbubble in gold nanorod (GNR) colloidal solution induced by a pulsed laser. Owing to surface plasmon resonance (SPR)-enhanced photothermal effect of GNR, several are at beginning illumination then trigger optical breakdown water focal spot laser beam. Consequently, generation is facilitated; threshold energy significantly reduced for microbubbles with aid GNRs. We used probing He-Ne photodetector an ultrasonic...

The two apexes of an elongated gold nanorod (GNR) irradiated by a plane wave are shown to be the hotspots at longitudinal plasmon modes. This phenomenon implies that pair quantum dots (QDs) located these might excited simultaneously if excitation band QDs coincides with one Consequently, coherent emission emitters could happen subsequently. In following emission, two-level simulated as oscillating dipoles (bi-dipole) some possible phase differences. Our results show maximum radiative and...