18 papers · ranked by Valyu relevance
Athul Vinu, Dibyendu Roy
We explore amplification and cross-Kerr nonlinearity by a three-level emitter (3LE) embedded in a waveguide and driven by two light beams. The coherent amplification and cross-Kerr nonlinearity were demonstrated in recent experiments, respectively, with a V and a ladder-type 3LE coupled to an open superconducting…
Andrii Sokolov, Tero T. Heikkilä
We consider a model of two harmonically driven damped harmonic oscillators that are coupled linearly and with a cross-Kerr coupling. We show how to distinguish this combination of coupling types from the case where a coupling of optomechanical type is present. This can be useful for the characterization of various…
Si-Cong Tian, Huan-Yu Lu, Hang Zhang, Li-Jie Wang + 6 more
'Xin Zhang' 'Guan-Yu Hou' 'Zi-Ye Wang' 'Cun-Zhu Tong' 'Li-Jun Wang'] The nonlinearity of semiconductor quantum dots under the condition of low light levels has many important applications. In this study, linear absorption, self-Kerr nonlinearity, fifth-order nonlinearity and cross-Kerr nonlinearity of multiple quantum…
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…
Gonzalo Álvarez-Pérez, Huatian Hu, Fangcheng Huang, Tadele Orbula Otomalo + 2 more
'Tadele Orbula Otomalo' 'Michele Ortolani' 'Cristian Ciracì'] Nonlinear optical waveguides, particularly those harnessing the optical Kerr effect, are promising for advancing next-generation photonic technologies. Despite the Kerr effect's ultrafast response, its inherently weak nonlinearity has hindered practical…
Yibo Huang, Yao Lu, Wei Li, Xitan Xu + 6 more
'Lu Chen' 'Ningjuan Ruan' 'Qiang Wu' 'Jingjun Xu'] Optical Kerr effect, in which input light intensity linearly alters the refractive index, has enabled the generation of optical solitons, supercontinuum spectra, and frequency combs, playing vital roles in the on-chip devices, fiber communications, and quantum…
Jesse J. Slim, Ewold Verhagen
Nonlinearity is a key resource in both classical and quantum signal processing. Nonlinear nanomechanical elements have found applications ranging from sensing to computing, while networks of nonlinear resonators, as well as nonlinearly coupled networks of linear resonators, constitute promising platforms for simulating…
Evgeny N. Bulgakov, Dmitrii N. Maksimov
We consider nonlinear effects in scattering of light by a periodic structure supporting optical bound states in the continuum. In the spectral vicinity of the bound states the scattered electromagnetic field is resonantly enhanced triggering optical bistability. Using coupled mode approach we derive a nonlinear…
N. Moroney, L. Del Bino, S. Zhang, M. T. M. Woodley + 9 more
Kerr-effect-induced changes of the polarization state of light are well known in pulsed laser systems. An example is nonlinear polarization rotation, which is critical to the operation of many types of mode-locked lasers. Here, we demonstrate that the Kerr effect in a high-finesse Fabry-Pérot resonator can be utilized…
Morten Bache, Hairun Guo, Binbin Zhou, Xianglong Zeng
We study the anisotropic nature of the Kerr nonlinear response in a beta-barium borate (β-BaB2O4, BBO) nonlinear crystal. The focus is on determining the relevant χ (3) cubic tensor components that affect interaction of type I cascaded second-harmonic generation. Various experiments in the literature are analyzed and…
Mariam M. Tohari, Andreas Lyras, Mohamad S. AlSalhi
Hybrid nanocomposites can provide a promising platform for integrated optics. Optical nonlinearity can significantly widen the range of applications of such structures. In the present paper, a theoretical investigation is carried out by solving the density matrix equations derived for a metal nanoparticles-graphene…
Idan Parshani, Leon Bello, Mallachi-Elia Meller, Avi Pe’er
Dissipative solitons are fundamental wave-pulses that preserve their form in the presence of periodic loss and gain. The canonical realization of dissipative solitons is Kerr-lens mode locking in lasers, which delicately balance nonlinear and linear propagation in both time and space to generate ultrashort optical…
Alex Sheremet, Yuchen Zhou, Jack P. Kennedy, Yu Qin + 2 more
Cross-frequency coupling in the hippocampus has been hypothesized to support higher-cognition functions. While gamma modulation by theta is widely accepted, evidence of phase-coupling between the two frequency components is so far unconvincing. Our observations show that theta and gamma energy increases with rat speed…
Authors not listed
Two-dimensional metal halide phases, commonly known as 2D perovskites, have emerged as promising materials for exciton polaritons, particularly for polariton condensation. This process entails the spontaneous accumulation of population in the polariton ground state and relies on efficient energy relaxation. In this…
Davide Pierangeli, Andrea Tavani, Fabrizio Di Mei, Aharon J. Agranat + 2 more
'Claudio Conti' 'Eugenio DelRe'] A landmark of statistical mechanics, spin-glass theory describes critical phenomena in disordered systems that range from condensed matter to biophysics and social dynamics. The most fascinating concept is the breaking of replica symmetry: identical copies of the randomly interacting…
Santosh Manicka, Kathleen Johnson, Michael Levin, David Murrugarra
The extent to which the components of a biological system are (non)linearly regulated determines how amenable they are to therapy and control. To better understand this property termed ‘regulatory nonlinearity’, we analyzed a suite of 137 published Boolean network models, containing a variety of complex nonlinear…
Liam Shaughnessy, Lauren Vannell, Sulekh Fernando-Peiris, Cristina Rodríguez
Three-photon microscopy enables deep-tissue imaging but is highly sensitive to excitation pulse quality, since three-photon excitation efficiency scales with the cube of instantaneous intensity. Group-delay dispersion (GDD) and third-order dispersion (TOD) accumulated through the laser and microscope optics can…
Xiaomeng Jia, Warren S. Warren
Nonlinear optical microscopy modalities have become widely used in applications ranging from material characterization to tissue diagnosis. In complex systems, multiple mechanisms often contribute to the signal; for example, two-color pump-probe microscopy provides rich molecular signatures of the samples based on…