20 papers · ranked by Valyu relevance
Josiah Sinclair, Daniela Angulo, Noah Lupu-Gladstein, Kent Bonsma-Fisher + 1 more
'Kent Bonsma-Fisher' 'Aephraim M. Steinberg'] We report the experimental observation of a cross-Kerr nonlinearity in a free-space medium based on resonantly-excited, interacting Rydberg atoms and electromagnetically induced transparency. The nonlinearity is used to implement cross-phase modulation between two optical…
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…
Sina Khorasani
We present a full operator approach to treatment of the cross-Kerr interaction combined with parametric amplification. It is shown that this problem can be exactly integrated using the method of higher-order operators. While the initial basis is infinite-dimensional, an orthogonal transformation can reduce the problem…
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…
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…
Zongchen Liu, Irfan Ahmed, Garuma Abdisa, Zihai Jiang + 3 more
'Hongxing Wang' 'Yanpeng Zhang'] We report the generation of three-mode hybrid intensity-noise correlation and intensity-difference squeezing of spontaneous parametric four-wave mixing (SP-FWM) and fourth-order fluorescence (FL) signals in the heteronuclear-like (three-level Λ-type) molecular structure of a Pr3+:Y2SiO5…
Chaohan Cui, Liang Zhang, Linran Fan
Spontaneous symmetry breaking in nonlinear systems provides a unified method to understand vastly different phenomena, ranging from Higgs mechanism [1] and superconductivity [2] to ecological stability [3] and genome generation [4]. Spontaneous symmetry breaking is typically considered as the intrinsic property of…
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…
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…
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…
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…
Manato Okahara, Teruyuki Niimi, Shinichi Morita
Exaggerated insect traits often show positive allometry, yet nonlinear scaling can reflect either continuous curvature or discrete morphs. Distinguishing between these alternatives is important because they imply different developmental and evolutionary scenarios. Using cross-sectional data from 1,000 adult Oryctes…
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…
Yue Yu, Anchi Cheng, Elizabeth Montabana, Noeli Paz Soldán + 24 more
The laser phase plate (LPP) enables phase-contrast imaging in cryogenic electron microscopy (cryoEM), enhancing image contrast without compromising high-resolution information. Here we report the implementation of a crossed laser phase plate (xLPP) comprising two optical cavities oriented orthogonally, installed in a…
Authors not listed
In this paper, we prepare chiral, helical-structured copper (Cu) electrodes that manifest product selectivity control during the CO2 reduction reaction (CO2RR) owing to CISS and elucidate the mechanism using (spectro)electrochemistry and ultrafast spectroscopy. Regardless of their handedness, the chiral Cu electrodes…
Authors not listed
Two-dimensional electronic spectroscopy (2DES) has been utilized to track the dynamics of electronic excitations. However, 2DES often faces difficulties in spectral attribution due to the limitations of transient absorption detection. Therefore, the fluorescence-detected 2DES is long-awaited, and its performance can be…
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…
Authors not listed
Molecular polaritons, the hybridization of excitonic states in molecules with photonic excitation inside a cavity, play an important role in fundamental quantum science and technology. Understanding the decoherence mechanism of molecular polaritons is among the most significant fundamental questions. We theoretically…