21 papers · ranked by Valyu relevance
A. V. Chebykin, Alexey A. Orlov, Alexander S. Shalin, Alexander N. Poddubny + 1 more
'Alexander N. Poddubny' 'Pavel A. Belov'] We theoretically demonstrate the strong Purcell effect in ε-near-zero ultra-anisotropic uniaxial metamaterials with elliptic isofrequency surface. Contrary to the hyperbolic metamaterials, the effect does not rely on the diverging density of states and evanescent waves. As a…
Hongyi Chen, Juanjuan Ren, Ying Gu, Dongxing Zhao + 2 more
'Qihuang Gong'] The enhancement of the optical nonlinear effects at nanoscale is important in the on-chip optical information processing. We theoretically propose the mechanism of the great Kerr nonlinearity enhancement by using anisotropic Purcell factors in a double-Λ type four-level system, i.e., if the bisector of…
Sergey Krasikov, Ivan Iorsh
In this work we develop a self-consistent approach for calculation of the Purcell factor and Lamb shift in highly dispersive hyperbolic metamaterial accounting for the effective dipole frequency shift. Also we theoretically predict the possibility of spontaneous topological transition, which occurs not due to the…
Alexander E. Krasnok, Alexey P. Slobozhanyuk, Constantin R. Simovski, Sergei A. Tretyakov + 4 more
'Sergei A. Tretyakov' 'Alexander N. Poddubny' 'Andrey E. Miroshnichenko' 'Yuri S. Kivshar' 'Pavel A. Belov'] The Purcell effect is defined as a modification of the spontaneous emission rate of a quantum emitter at the presence of a resonant cavity. However, a change of the emission rate of an emitter caused by an…
Mikhail V. Rybin, Sergei F. Mingaleev, Mikhail F. Limonov, Yuri S. Kivshar
'Yuri S. Kivshar'] The Purcell effect and Lamb shift are two well-known physical phenomena which are usually discussed in the context of quantum electrodynamics, with the zero-point vibrations as a driving force of those effects in the quantum approach. Here we discuss the classical counterparts of these quantum…
Ernesto Pini, Michele Giusfredi, Lorenzo Pattelli
- 1 Istituto Nazionale di Ricerca Metrologica (INRiM), 10135, Turin, Italy - 2 European Laboratory for Non-linear Spectroscopy (LENS), 50019, Sesto Fiorentino, Italy - 3 Department of Physics and Astronomy, Universit`a di Firenze, 50019, Sesto Fiorentino, Italy - 4 Istituto dei Sistemi Complessi, Consiglio Nazionale…
Ernesto Pini, Danila Di Meo, Irene Costantini, Michele Sorelli + 4 more
Accurate modeling of light diffusion in the human brain is crucial for applications in optogenetics and spectroscopy diagnostic techniques. White matter tissue is composed of myelinated axon bundles, suggesting the occurrence of enhanced light diffusion along their local orientation direction, which however has never…
Ernesto Pini, Peter Naglič, Miran Bürmen, Alexander Gatto + 2 more
fully anisotropic media Authors: ['Ernesto Pini' 'Peter Naglič' 'Miran Bürmen' 'Alexander Gatto' 'Henrik Schäfer' 'Diederik S. Wiersma'] Structurally anisotropic materials are ubiquitous in several application fields, yet their accurate optical characterization remains challenging due to the lack of general models…
Li-Hao Yeh, Ivan E. Ivanov, Janie R. Byrum, Bryant B. Chhun + 10 more
Biological architecture is intrinsically tensorial. The permittivity tensor (PT) of biological material reports the density, angular anisotropy, symmetry, and 3D orientation of biomolecules. High-resolution measurement of PT can enable quantitative and label-free analysis of organelle, cell, and tissue architecture…
Xin-Tao He, Yao-Nan Zhong, You Zhou, Zhi-Chao Zhong + 1 more
A certain class of photonic crystals with conical dispersion is known to behave as isotropic zero-refractive-index medium. However, the discrete building blocks in such photonic crystals are limited to construct multidirectional devices, even for high-symmetric photonic crystals. Here, we show multidirectional emission…
Yosep Shin, Kyungtae Kim, Jaewhan Lee, Saman Jahani + 2 more
'Sangsik Kim'] Title: Abstract Photonic integrated circuits (PICs) are transforming optical technology by miniaturizing complex photonic elements and systems onto single chips. However, scaling PICs to higher densities is constrained by optical crosstalk and device separation requirements, limiting both performance and…
К. В. Воронин, Gonzalo Álvarez‐Pérez, Pablo Alonso‐González, Alexey Y. Nikitin
'Alexey Y. Nikitin'] Abstract. Polaritons in strongly anisotropic thin layers have recently captured the attention in nanophotonics because of their directional propagation at the nanoscale, which offers unique possibilities for nanooptical applications. However, exploiting the full potential of anisotropic polaritons…
Felix Stete, Wouter Koopman, Carsten Henkel, Oliver Benson + 2 more
Light--matter coupling in plasmonic nanocavities has been widely studied in the past years. Yet, for core--shell particles, popular electromagnetic models that use the classical Lorentz oscillator to describe the shell predict extinction spectra with three maxima, if the plasmon and the shell absorption are in…
Chandroth P. Jisha, Alessandro Alberucci, Lorenzo Marrucci, Gaetano Assanto
'Gaetano Assanto'] We discuss the propagation of an electromagnetic field in an inhomogeneously anisotropic material where the optic axis is rotated in the transverse plane but is invariant along the propagation direction. In such a configuration, the evolution of an electromagnetic wavepacket is governed by the…
Rivi Ratnaweera, Freddy Rodríguez Ortiz, Nicholas Gripp, Matthew Sheldon
Aligning large populations of colloidal nanorods (NRs) into ordered assemblies provides a strategy for engineering macroscopic functional materials with strong optical anisotropy. The bulk optical properties of such systems depend not only on the individual NR building blocks, but also on their meso- and macroscale…
C. P. Jisha, S. V. Arumugam, L. Marrucci, S. Nolte + 1 more
'Alessandro Alberucci'] We theoretically and numerically investigate the properties of waveguides based on the Pancharatnam-Berry phase, obtained by a longitudinally periodic rotation of the optic axis in a transversely-twisted birefringent medium. In this paper we study the case where the period of the longitudinal…
Zhineng Xie, Guowu Huang, Weihao Lin, Xin Jin + 2 more
The vectorial evolution of polarized light interaction with a medium can reveal its microstructure and anisotropy beyond what can be obtained from scalar light interaction. Anisotropic properties (diattenuation, retardance, and depolarization) of a complex medium can be quantified by polarization imaging by measuring…
Authors not listed
The liquid crystal (LC) poly-γ-benzyl-L-glutamate (PBLG) is known to possess a narrow biphasic range at the phase transition from an isotropic liquid to anisotropic liquid crystal. We have characterized the biphasic region via deuterium nuclear magnetic resonance (NMR) of the deuterated solvent CDCl3, with which…
Leonardo Uribe Castaño, Kamdin Mirsanaye, Lukas Kontenis, Serguei Krouglov + 2 more
We employ wide-field second harmonic generation (SHG) microscopy together with nonlinear Stokes polarimetry for quick ultrastructural investigation of large sample areas (700 μm x 700 μm) in thin histology sections. The Stokes vector components for SHG are obtained from the polarimetric measurements with incident and…
Wenxiang Ying, Michael Taylor, Pengfei Huo
We present a theory that explains the reso- nance effect of the vibrational strong coupling (VSC) modified reaction rate constant at the normal incidence of a Fabry-Pérot (FP) cavity. This analytic theory is based on a mechanistic hypothesis that cavity modes promote the transition from the ground state to the…
Sophie Ketter, Marina Dajka, Olga Rogozhnikova, Sergey A. Dobrynin + 3 more
Spectroscopic investigation of membrane proteins in their native environment is a challenging task. Earlier we demonstrated the feasibility to measure precise distances within outer membrane proteins in E. coli and native membranes using methanethiosulfonate (MTS) functionalized labels combined with pulsed electron…