19 papers · ranked by Valyu relevance
Andrea Armaroli, Guillaume Dujardin, Alexandre Kudlinski, Arnaud Mussot + 2 more
'Arnaud Mussot' 'Stephan De Bièvre' 'Matteo Conforti'] We study modulational instability in a dispersion-managed system where the sign of the groupvelocity dispersion is changed at uniformly distributed random distances around a reference length. An analytical technique is presented to estimate the instability gain…
Amdad Chowdury, Benjamin J. Eggleton, Dawn T.H. Tan
Ultra-silicon-rich nitride Bragg gratings provide a powerful platform for precise light manipulation in photonic chips. Their exceptionally high nonlinearity and strong grating-induced dispersion near the stop-band edges significantly reduce the power and length required for chip-scale light-matter interactions. Using…
Lynn Sader, Yassin Boussafa, Van Thuy Hoang, Raktim Haldar + 2 more
'Michael Kues' 'Benjamin Wetzel'] Title: Abstract Controlling nonlinear pulse propagation in optical fibers is paramount for applications spanning spectroscopy and optical communication networks. However, the inherent complexity of laser pulse evolution in matter, shaped by the interplay of nonlinearity and dispersion…
Andrei V. Ermolaev, Mehdi Mabed, Christophe Finot, Goëry Genty + 1 more
'John M. Dudley'] We analyze the dynamics of modulation instability in optical fiber (or any other nonlinear Schrödinger equation system) using the machine-learning technique of data-driven dominant balance. We aim to automate the identification of which particular physical processes drive propagation in different…
Monika Nath, Rohit Mukherjee, Nitu Borgohain
This article explores the modulation instability of a continuous or quasi-continuous weak probe pulse in a three-level asymmetric double quantum wells under an electromagnetically induced transparency regime, controlled by a strong laser beam. The dynamics of modulation instability reveals that the instability gain as…
Wafy M. Hasan, Hamdy M. Ahmed, Ahmed M. Ahmed, Haytham M. Rezk + 1 more
'Wafaa B. Rabie'] This study explores the dynamics of highly dispersive optical solitons in nonlinear Schrödinger equations (NLSE) with non-local self-phase modulation (SPM) and polarization-mode dispersion (PMD). These nonlinear effects significantly influence soliton propagation and stability in advanced optical…
Antoine Demiquel, V. Achilleos, G. Theocharis, Vincent Tournat
In this paper, we study modulation instabilities (MI) in a one-dimensional chain configuration of a flexible mechanical metamaterial (flexMM). Using the lumped element approach, flexMMs can be modeled by a coupled system of discrete equations for the longitudinal displacements and rotations of the rigid mass units. In…
Alina Y. Morkina, Dmitry V. Bachurin, Sergey V. Dmitriev, Aleksander S. Semenov + 3 more
'Aleksander S. Semenov' 'Elena A. Korznikova' 'Angelo Marcello Tarantino' 'Andrea Sanson'] Delocalized nonlinear vibrational modes (DNVMs) are exact solutions of the equations of motion, and therefore, DNVMs exist at any vibration amplitude and do not depend on interaction potentials. For the first time, modulation…
Wafaa B. Rabie, W. Abbas, M. Elsaid Ramadan, Hamdy M. Ahmed
This study presents a comprehensive analytical exploration of the coupled nonlocal Lakshmanan-Porsezian-Daniel (LPD) equation, a seminal model for describing wave propagation in highly nonlocal nonlinear media. By employing the powerful extended F-expansion technique, we derive a rich spectrum of exact analytical…
M. Alavi, Rasul Azizpour, Hassan Zakeri, Gholamreza Moradi
—This paper proposes a novel method to enhance the performance of the modulator for fifth-generation wireless communication (5G) by exploiting modulation instability (MI). We show that MI can reduce the modulator's bias voltage (Vπ) by generating carrier side-band gain, and increase the modulation BandWidth (BW)…
Ryan Hamerly, Evan Laksono, Marc Jankowski, Edwin Ng + 3 more
'Myoung‐Gyun Suh' 'Hideo Mabuchi'] Abstract—We investigate a new mode-locking regime in the singly-resonant OPO employing simultaneous amplitude- and frequency-modulation of the intracavity field. This OPO exhibits deterministic, "turnkey" formation of a stable, broadband, chirped frequency comb with high conversion…
Jiuda Wu, Behrooz Yousefzadeh
We investigate the phenomenon of parametric instability in discrete models of spatiotemporally modulated materials. These materials are celebrated in part because they exhibit nonreciprocal transmission characteristics. However, parametric instability may occur for strong modulations, or occasionally even at very small…
Authors not listed
This paper formally defines an operational isomorphism between spectral damping in molecular vibronic systems and neuromodulatory control in biological sensory systems. Without asserting causal continuity or physical identity across scales, we show that both domains instantiate the same class of output-selective…
Sébastien M. Popoff, Yaron Bromberg, Maxime W. Matthès, Rodrigo Gutiérrez–Cuevas
'Rodrigo Gutiérrez–Cuevas'] Abstract. Digital micromirror devices have gained popularity in wavefront shaping, offering a high frame rate alternative to liquid crystal spatial light modulators. They are relatively inexpensive, offer high resolution, are easy to operate, and a single device can be used in a broad…
Shoujun Yu, Wenji Yue, Tianruo Guo, Yonghong Liu + 10 more
Repetitive electrical nerve stimulation can induce a long-lasting perturbation of the axon’s membrane potential, resulting in unstable stimulus-response relationships. Despite being observed in electrophysiology, the precise mechanisms underlying stimulus-induced instability is still an open question due to the lack of…
AbdelQader AlKilany, Dan F. M. Goodman
Spiking neurons underlie the brain’s extreme energy efficiency, and therefore have great potential in neuromorphic computing, although realising this efficiency in practice has proven challenging. We use neuromodulation, a biological mechanism that lets the network dynamically and contextually modify its own…
Ilker Duymaz, Naoki Kogo, Nihan Alp
Periodic changes in visual input can produce rhythmic patterns in EEG signals, which appear as narrowband frequency components. These components are commonly interpreted as reflecting the activity of neurons sensitive to the modulated stimulus features. Here, we present a scenario in which frequency components arise…
Subhadip Mondal, Srihari Keshavamurthy
Explanation for the modification of rates and mechanism of reactions carried out in optical cavities still eludes us. Several studies indicate that the cavity-mediated changes in the nature of vibrational energy flow within a molecule may play a significant role. Here we study a model polaritonic system, proposed and…
Khulood Al-sakkaf, Monicka Kullappan, Manoj Chaudhury
Recent studies demonstrated that an elastomer containing hygroscopic inclusions absorbs moisture and swell. Here we show that a thin film of such an elastomer bonded to a rigid substrate undergoes morphological instability upon absorption of water, the wavelength of which increases linearly with its thickness. As the…