Article
Optics
A. Yulin, A. Andrianov, E. A. Anashkina
Summary: The formation and stability of dissipative solitons in the vector Lugiato-Lefever model are studied in the case where only one field component is excited. It is shown that linearly polarized solitons can become unstable due to excitations of the orthogonal polarization. Bifurcating from linearly polarized solitons, vector solitons with elliptical polarization are found and their stability and dynamics are investigated.
Article
Computer Science, Software Engineering
Oliver Melchert, Ayhan Demircan
Summary: The Python toolkit allows simulation of dissipative soliton propagation dynamics in a variant of the Lugiato-Lefever equation with third and fourth order dispersion terms. Users can specify propagation scenarios for custom control parameters and initial conditions via a simple data structure. The software package demonstrates obtaining stationary solutions of the standard LLE containing a dissipative soliton and different characteristic propagation scenarios.
Article
Engineering, Electrical & Electronic
Noor Aziz, Aly R. Seadawy, Umar Raza, Kashif Ali, Syed T. R. Rizvi
Summary: This paper investigates the trapping behavior of bound state laser beams and discusses methods for controlling the threshold amplitude for soliton trapping. The research results have important application value in the field of optical fiber communication.
OPTICAL AND QUANTUM ELECTRONICS
(2022)
Article
Optics
Zi-Chen Qian, Meng Liu, Ai-Ping Luo, Zhi-Chao Luo, Wen-Cheng Xu
Summary: In this study, the characteristics of dissipative pure-quartic soliton (DPQS) generation in a fiber laser were investigated. The experimental results demonstrate that DPQS features shape-preserving propagation with an asymmetrical temporal profile. The asymmetrical temporal profile of DPQS is caused by the mismatching of phase shift profiles resulting from self-phase modulation and fourth-order dispersion. Compared to conventional dissipative solitons, DPQS exhibits a higher energy-scaling ability.
Article
Physics, Multidisciplinary
Xue Dong, Christopher Spiess, Victor G. Bucklew, William H. Renninger
Summary: Optical Kerr resonators demonstrate various stable nonlinear phenomena in a simple and compact design, which benefit applications such as spectroscopy and telecommunications. While the mean-field Lugiato-Lefever equation accurately describes most anomalous dispersion Kerr resonators, highly chirped pulses in normal dispersion resonators with a spectral filter cannot be accurately described by this equation. The study modified the Lugiato-Lefever equation in the normal dispersion regime with a Gaussian spectral filter, finding stable highly chirped pulses whose characteristics strongly depend on the filter bandwidth.
PHYSICAL REVIEW RESEARCH
(2021)
Article
Physics, Fluids & Plasmas
Edem Kossi Akakpo, Marc Haelterman, Francois Leo, Pedro Parra-Rivas
Summary: In this paper, we theoretically investigate the dynamics, bifurcation structure, and stability of dark localized states in Kerr cavities with positive second- and fourth-order dispersion. We found that dark states form through the locking of uniform wave fronts, or domain walls, and undergo a bifurcation structure known as collapsed homoclinic snaking. We also showed that increasing the dispersion of fourth order can stabilize bright localized states.
Article
Optics
Layton A. Hall, Ayman F. Abouraddy
Summary: Angular dispersion can cancel normal group-velocity dispersion, but not anomalous group-velocity dispersion. By introducing non-differentiable angular dispersion into the pulsed field, dispersion-cancellation can be achieved in either the normal or anomalous dispersion regime.
LASER & PHOTONICS REVIEWS
(2023)
Article
Optics
Xinyi Zhu, Luis Romero Cortes, Jose Azana
Summary: The study introduces a novel method to track the temporal evolution of complex waveforms using a single-frequency-driven phase modulator. Experimental results show that tuning the frequency and amplitude of the phase modulation signal allows observation of the temporal evolution of different optical picosecond pulsed waveforms in the optical frequency domain, leading to finding the optimal pulse compression conditions.
Article
Mathematics, Interdisciplinary Applications
Laurent Nana, Gaetan Kuetche Saadeu
Summary: This paper investigates the influence of higher-order effects on dissipative soliton mapping in the complex cubic-quintic Ginzburg-Landau equation (CCQGLE) through numerical solutions and a dynamical model. Stationary and pulsating solutions were generated, showing the impact of fourth-order dispersion. The results demonstrate that long-lived pulsed solutions with small fluctuations can be considered as nonlinear solutions, and the dispersion can be compensated by nonlinearity.
CHAOS SOLITONS & FRACTALS
(2023)
Article
Physics, Condensed Matter
R. Vignesh, C. Nithya Prabha, R. Sivakumar, C. Sanjeeviraja
Summary: By adjusting the spray solution concentration, the optical parameters of Mn2O3 thin films can be altered, while also affecting the degree of crystal defects and surface morphology of the films.
PHYSICA B-CONDENSED MATTER
(2022)
Article
Engineering, Mechanical
Nitesh Arora, Qi Yao, Stephan Rudykh
Summary: In this study, we report the observation of deformation-induced negative group velocity (NGV) state in non-periodic media. The phenomenon is illustrated using examples of shear waves traveling along the non-periodic direction of pre-strained soft laminates. We show that the NGV state can be activated in absolutely stable laminates without buckling, through tailored stiffening behavior of their non-Gaussian soft phases.
EXTREME MECHANICS LETTERS
(2022)
Article
Optics
Ruben S. Luis, Benjamin J. Puttnam, Georg Rademacher, Satoshi Shinada, Hideaki Furukawa
Summary: This work proposes an approach to compensate for inter-core skew in homogeneous single-mode multi-core fiber links by adjusting the wavelengths of transmitted spatial channels. Experimental demonstration with a 111 Gb/s spatial super channel on a 10.1 km 19-core multi-core fiber shows that inter-core skew can be mitigated without the need for additional devices.
Article
Engineering, Electrical & Electronic
Jie Meng, Weiwen Li, Liangcai Zhang
Summary: This paper investigates noncoplanar dentate complementary structure units to achieve mode splitting in spoof surface plasmon polaritons (SSPPs). The mode on the high-frequency side exhibits negative group velocity (NGV) near the cutoff frequency. The symmetry of the complementary structure can be manipulated to control the dispersion characteristics of NGV modes. It is confirmed that the actual transmission wave in the SSPP waveguide is the superposition result of the two split-mode wave components.
MICROWAVE AND OPTICAL TECHNOLOGY LETTERS
(2023)
Article
Physics, Multidisciplinary
P. Hilden, E. Ilina, M. Kaivola, A. Shevchenko
Summary: It has been discovered that the group velocity of an optical beam can be adjusted by designing the angular dispersion, including achieving subluminal and superluminal propagation as well as periodic oscillation of local group velocities. These findings are of great importance to scientists in the fields of optics, optical interferometry, and more.
NEW JOURNAL OF PHYSICS
(2022)
Article
Nanoscience & Nanotechnology
Jun Lei, Weiwen Li, Qian Qiao, Lei Zhang, Jie Lin
Summary: Although there have been discussions on negative group velocity, disagreements over its explanations are still ongoing. This paper proposes that negative group velocity is just a part of the actual wave group and needs to be accompanied by positive group velocity. A composite wave with negative group velocity propagates forward as a tumbling vortex in the form of an attenuated or evanescent wave. The existence of negative group velocity is limited to the anomalous dispersion band with resonance absorption. This wave group model is confirmed by the characteristics of spoof surface plasmon polaritons.
Article
Physics, Multidisciplinary
Ihar Babushkin, Alvaro Jimenez Galan, Jose Ricardo Cardoso de Andrade, Anton Husakou, Felipe Morales, Martin Kretschmar, Tamas Nagy, Virgilijus Vaicaitis, Liping Shi, David Zuber, Luc Berge, Stefan Skupin, Irina A. Nikolaeva, Nikolay A. Panov, Daniil E. Shipilo, Olga G. Kosareva, Adrian N. Pfeiffer, Ayhan Demircan, Mark J. J. Vrakking, Uwe Morgner, Misha Ivanov
Summary: This paper discusses the possible time delay of electron tunnelling from an atom and presents an all-optical method to study this phenomenon. The research shows that the tunnelling wavepacket undergoes reshaping as it emerges from the tunnelling barrier and moves away from the core, and this can be complemented by measuring the Brunel radiation emitted by the tunnelling electrons.
Article
Physics, Multidisciplinary
O. Melchert, S. Willms, I Oreshnikov, A. Yulin, U. Morgner, I Babushkin, A. Demircan
Summary: Nonlinear waveguides can support the formation of molecule-like two-color pulse compounds with distinct domains of anomalous dispersion. Perturbing these compounds leads to periodic amplitude and width variations resembling molecular vibrations. The dynamics of the pulse compounds transition from harmonic to nonlinear oscillations with increasing perturbation strength.
NEW JOURNAL OF PHYSICS
(2023)
Article
Optics
O. Melchert, S. Bose, S. Willms, I. Babushkin, U. Morgner, A. Demircan
Summary: We investigate incoherently coupled two-frequency pulse compounds in waveguides with single zero-dispersion and zero-nonlinearity points. Soliton dynamics can be achieved in these waveguides, supported by negative nonlinearity, even in regions of normal dispersion. We demonstrate the trapping of weak pulses by solitary-wave wells, forming nonlinear-photonics meta-atoms and molecule-like bound states of pulses. The impact of the Raman effect on these pulse compounds is studied, revealing variable deceleration, acceleration, or no effect depending on the specific subpulse configuration. Our findings expand the range of systems in which two-frequency pulse compounds can exist and demonstrate additional unique and unexpected behavior.
Article
Computer Science, Software Engineering
Oliver Melchert, Ayhan Demircan
Summary: This article introduces research that provides Python tools for numerical simulation and analysis of the propagation dynamics of ultrashort laser pulses in nonlinear waveguides. The software implements the effects of linear dispersion, pulse self-steepening, and the Raman effect, with a focus on input pulse shot noise modeling. The functionality of the software is demonstrated by reproducing results for a supercontinuum generation process documented in scientific literature.
Article
Engineering, Electrical & Electronic
S. Willms, S. Bose, O. Melchert, U. Morgner, I. Babushkin, A. Demircan
Summary: In this study, we investigate a fiber-based self-generation scheme that utilizes soliton fission and spectral tunneling process to generate two-frequency compound states. The efficiency of the generation process is enhanced by the Raman effect, and the impact of the input pulse parameters on the scheme is analyzed.
IEEE PHOTONICS TECHNOLOGY LETTERS
(2023)
Article
Optics
O. Melchert, S. Willms, I. Babushkin, U. Morgner, A. Demircan
Summary: We provide a detailed overview of the physics of two-color soliton molecules in nonlinear waveguides, focusing on the binding mechanism and the rich dynamical behavior. The mutual confinement of subpulses, enabled by the nonlinear Kerr effect, leads to stable propagation of the pulse compound. The article discusses the formation of molecule-like bound-states and the resonant emission of multi-frequency radiation.
Article
Materials Science, Multidisciplinary
Simon Spelthann, Jonas Thiem, Oliver Melchert, Rajesh Komban, Christoph Gimmler, Ayhan Demicran, Axel Ruehl, Detlev Ristau
Summary: A versatile approach is developed to predict the lifetimes and quantum yields of lanthanide nanoparticles, taking into account the spatiotemporal dynamics. By synthesizing LiYF4:Pr3+ nanoparticles as a model system and matching the model parameters using a concentration series of lifetimes, the lifetimes and quantum yields of a size series are accurately predicted with a maximum uncertainty of 12.6%. Furthermore, the addition of a neutral shell around the core particles in the model extends the lifetime by up to 44%, demonstrating the potential of the model for applications such as efficient nanoparticle lasers or quantum memories.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
F. A. Benimetskiy, A. Yulin, A. O. Mikhin, V Kravtsov, I. Iorsh, M. S. Skolnick, I. A. Shelykh, D. N. Krizhanovskii, A. K. Samusev
Summary: Recently reported large values of exciton-polariton nonlinearity of transition metal dichalcogenide (TMD) monolayers coupled to optically resonant structures approach the values characteristic for GaAs-based systems in the regime of strong light-matter coupling. Contrary to the latter, TMD-based polaritonic devices remain operational at ambient conditions and therefore have greater potential for practical nanophotonic applications.
Article
Optics
A. Verbitskiy, A. Yulin, A. G. Balanov
Summary: We investigated the response of an optical system with Kerr nonlinearity to a periodic train of coherent pulses. The intensity of the excited field in the system was found to depend resonantly on the pulses' period. Numerical and analytical results demonstrated that the system's response is stronger when the pulse period is commensurate with the period of Bloch oscillations. Moreover, sufficiently large pulses can induce instabilities leading to chaotic Bloch oscillations of the wave-function envelope in both time and space. These instabilities are associated with period-doubling bifurcations, with a cascade of such bifurcations triggering the chaotic behavior.
Article
Optics
Ivan Oreshnikov, Oliver Melchert, Stephanie Willms, Surajit Bose, Ihar Babushkin, Ayhan Demircan, Uwe Morgner, Alexey Yulin
Summary: This paper investigates the interaction between two-color solitary waves generated in waveguides with two separate regions of anomalous dispersion and dispersive radiation. It includes deriving the resonance conditions analytically, verifying them through numeric experiments, and studying the internal oscillations of the soliton and the scattering process when subjected to intense incident radiation. The resonance conditions are also generalized for oscillating solitons, and the scattering process is demonstrated to probe and excite internal modes of two-color soliton molecules.
Article
Optics
Stephanie Willms, Oliver Melchert, Surajit Bose, Alexey Yulin, Ivan Oreshnikov, Uwe Morgner, Ihar Babushkin, Ayhan Demircan
Summary: Bound states of optical solitons are ideal for studying nonlinear wave interaction principles and have similarities with phenomena in quantum mechanics. We investigate the properties of these compound states and demonstrate their unique propagation dynamics. These findings have implications for the study and application of photonic molecules.
