Article
Materials Science, Multidisciplinary
Motohiko Ezawa
Summary: The text discusses a nonlinear system achieved through coupled pendulums, highlighting topological and non-topological phase transitions, as well as observable phenomena through quench dynamics.
Article
Chemistry, Physical
Philip A. Thomas, Kishan S. Menghrajani, William L. Barnes
Summary: The study demonstrates that external structures are unnecessary for achieving room-temperature ultrastrong light-matter coupling. This discovery could aid in the design of experiments to probe polaritonic chemistry and suggests that polaritonic states may be easier to realize than previously thought.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Physics, Multidisciplinary
Motohiko Ezawa
Summary: This study investigates topological edge states in a topological quasicrystal in the presence of nonlinearity by introducing modulated periodic hoppings. The results show that topological edge states can survive against nonlinearity and that the quasicrystal hopping modulation induces an extended-localization transition.
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
(2022)
Article
Multidisciplinary Sciences
Biswajit Datta, Mandeep Khatoniar, Prathmesh Deshmukh, Felix Thouin, Rezlind Bushati, Simone De Liberato, Stephane Kena Cohen, Vinod M. Menon
Summary: Realizing nonlinear optical response in the low photon density limit in solid-state systems has been a long-standing challenge. Semiconductor microcavities hosting exciton-polaritons have emerged as attractive candidates in this context. However, the weak interaction between these quasiparticles has been a hurdle in this quest. Dipolar excitons provide an attractive strategy to overcome this limitation. The interlayer dipolar excitons in bilayer MoS2 alleviate this issue and demonstrate unprecedented nonlinear interaction strengths compared to conventional A excitons. These highly nonlinear dipolar polaritons will likely be a frontrunner in the quest for solid-state quantum nonlinear devices.
NATURE COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
Meng-Han Zhang, Dao-Xin Yao
Summary: By calculating its Berry curvature, Chern number, and edge states, we present the topology of magnons on the triangular kagome lattice (TKL). In addition to the ferromagnetic state, the TKL also hosts a ferrimagnetic ground state. Using Holstein-Primakoff boson theory and Green's function approach, we find that the TKL has a rich topological band structure compared with the kagome and honeycomb lattices. The magnon edge current allows for the calculation of thermal Hall coefficients and the orbital angular momentum correlates with the Einstein-de Haas effect.
Article
Multidisciplinary Sciences
Byoung-Uk Sohn, Yue-Xin Huang, Ju Won Choi, George F. R. Chen, Doris K. T. Ng, Shengyuan A. Yang, Dawn T. H. Tan
Summary: This research reports on the topological nonlinear parametric amplification in a dimerized coupled waveguide system. The high-speed transmission and low-power optical parametric amplification are achieved by exploiting the strong localization properties of the waveguide. Moreover, a mechanism for Kerr-induced control of the transition from topological boundary states to bulk states is demonstrated.
NATURE COMMUNICATIONS
(2022)
Article
Multidisciplinary Sciences
L. Lackner, M. Dusel, O. A. Egorov, B. Han, H. Knopf, F. Eilenberger, S. Schroeder, K. Watanabe, T. Taniguchi, S. Tongay, C. Anton-Solanas, S. Hoefling, C. Schneider
Summary: Researchers demonstrated lattice polaritons with excitons in a WS2 monolayer strongly coupled to an imprinted photonic lattice in a tunable open optical cavity at room temperature, showing reconfigurability over a spectral window exceeding 85 meV and systematic variation of nearest-neighbor coupling. The technology presented in this work is a critical step towards reconfigurable photonic emulators operated with non-linear photonic fluids, offering simple experimental implementation and working at ambient conditions.
NATURE COMMUNICATIONS
(2021)
Review
Materials Science, Multidisciplinary
Dmitry D. Solnyshkov, Guillaume Malpuech, Philippe St-Jean, Sylvain Ravets, Jacqueline Bloch, Alberto Amo
Summary: Microcavity polaritons are quasiparticles resulting from the strong coupling between light and matter in semiconductor microcavities, offering excellent properties for studying topological phases in photonics. They are used in one and two-dimensional lattices for direct access to band properties through standard optical tools.
OPTICAL MATERIALS EXPRESS
(2021)
Article
Optics
Jiale Yuan, Chenran Xu, Han Cai, Da-Wei Wang
Summary: The proposed scheme efficiently transfers photons in a scalable one-dimensional waveguide array by transporting the topological defect state of a Su-Schrieffer-Heeger model, using a constant energy gap for protected excitation transfer. Additionally, quasi-periodic oscillations induced by the non-adiabatic effect can further speed up the transport process.
Article
Physics, Multidisciplinary
Marco S. Kirsch, Yiqi Zhang, Mark Kremer, Lukas J. Maczewsky, Sergey K. Ivanov, Yaroslav V. Kartashov, Lluis Torner, Dieter Bauer, Alexander Szameit, Matthias Heinrich
Summary: Higher-order topological insulators represent a novel topological phase with boundary modes characterized by a unique co-dimension of at least two. Despite promising preliminary considerations, experimental research on these systems has been limited to linear evolution of topological states, with observation of the interplay between nonlinearity and dynamics of higher-order topological phases remaining elusive. However, experimental demonstration of nonlinear higher-order topological corner states and observation of soliton formation in such structures could pave the way for exploring topological properties of matter in the nonlinear regime and potentially lead to the development of compact devices harnessing the intriguing features of topology.
Article
Physics, Multidisciplinary
Magnus Johansson
Summary: We demonstrate the existence of breathing edge modes in the Su-Schrieffer-Heeger model with cubic on-site nonlinearity. These modes originate from stationary edge solitons and have exact solutions to the nonlinear equations of motion. They exhibit time-periodic intensity oscillations and exponentially decaying tails from the edge. The numerical analysis shows their linear stability, even in regimes of large-amplitude oscillations characterized by time-periodic power exchange between neighboring sites.
Article
Physics, Fluids & Plasmas
Mark J. Ablowitz, Justin T. Cole, Pipi Hu, Peter Rosenthal
Summary: The Peierls-Nabarro barrier is a common effect in discrete nonlinear systems, but topologically protected edge modes in a periodic honeycomb lattice are shown to be unaffected by it, while non-topological modes do slow down and eventually stop propagating. This study provides insight into the nature and application of nonlinear topological insulators.
Article
Physics, Multidisciplinary
Fangyuan Ma, Zheng Tang, Xiaotian Shi, Ying Wu, Jinkyu Yang, Di Zhou, Yugui Yao, Feng Li
Summary: This article discusses the design and construction of elliptically geared isostatic metamaterials, which can exhibit nonlinear topological transitions through collective soliton motions. It also demonstrates the unique nonlinear topological mechanics of these materials, which have significant potential for applications.
PHYSICAL REVIEW LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Amrita Mukherjee, Atanu Nandy, Shreekantha Sil, Arunava Chakrabarti
Summary: This study demonstrates the triggering of topological phase transitions and flat bands in a multistrand Creutz ladder network through a suitable correlation between system parameters. By changing the basis appropriately, a finite N-strand mesh can be mapped into N or N-1 decoupled SuSchrieffer-Heeger chains, depending on the parity of N. The use of a simple real-space decimation scheme is powerful in analytically extracting and explaining the flat bands.
Article
Multidisciplinary Sciences
Shiqi Xia, Dimitrios Kaltsas, Daohong Song, Ioannis Komis, Jingjun Xu, Alexander Szameit, Hrvoje Buljan, Konstantinos G. Makris, Zhigang Chen
Summary: The study established a nonlinear non-Hermitian topological platform for active tuning of PT symmetry and topological states, revealing the interaction between sensitivity close to exceptional points and the robustness of non-Hermitian topological states. The research provides opportunities for unconventional light manipulation and device applications through single-channel control of global PT symmetry and topology via local nonlinearity.
Article
Physics, Applied
A. D. Belogur, D. A. Baghdasaryan, I. V. Iorsh, I. A. Shelykh, V. Shahnazaryan
Summary: We present a quantitative study of the nonlinear optical response of layered perovskites and find that the peculiar form of the interaction potential in these materials results in a dominant contribution of the Rabi splitting quench effect in the nonlinear optical response.
PHYSICAL REVIEW APPLIED
(2022)
Article
Materials Science, Multidisciplinary
D. A. Baghdasaryan, E. S. Hakobyan, D. B. Hayrapetyan, I. V. Iorsh, I. A. Shelykh, V. Shahnazaryan
Summary: This study theoretically investigates the excitonic nonlinearity in hybrid organic-inorganic Ruddlesden-Popper perovskite thin films, and experimentally demonstrates the effect of a transverse electric field.
PHYSICAL REVIEW MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Mikhail A. Masharin, Vanik A. Shahnazaryan, Fedor A. Benimetskiy, Dmitry N. Krizhanovskii, Ivan A. Shelykh, Ivan V. Iorsh, Sergey V. Makarov, Anton K. Samusev
Summary: Exciton-polaritons show strong nonlinearity and can be used for all-optical integrated logic gates. However, their application is limited to cryogenic temperatures due to the connection between exciton robustness and exciton-exciton interaction strength. In this study, we demonstrate that perovskite materials have strong polaronic effects, allowing for high nonlinear optical response even at elevated temperatures.
Article
Optics
N. Amiune, Z. Fan, V. V. Pankratov, D. N. Puzyrev, D. Skryabin, K. T. Zawilski, P. G. Schunemann, I Breunig
Summary: We have generated mid-IR microcombs for the first time using cascaded three-wave mixing in a CdSiP2 microresonator. By pumping the CdSiP2 microresonator at 1.55μm wavelength with a low power continuous wave laser, we obtained X-(2) frequency combs at 3.1μm wavelength with a span of about 30 nm. Our scheme is compatible with integrated telecom lasers, making it a potential simple and fully integrated mid-IR comb source relying on only one single material.
Article
Optics
Anthonin Delphan, Maxim N. Makhonin, Tommi Isoniemi, Paul M. Walker, Maurice S. Skolnick, Dmitry N. Krizhanovskii, Dmitry V. Skryabin, Jean-Francois Carlin, Nicolas Grandjean, Raphael Butte
Summary: We observed polariton lasing in micro-ring resonators based on GaN/AlGaN slab waveguides in the UV spectral range, with stimulated polariton relaxation into multiple ring resonator modes. The strong exciton-photon coupling regime was confirmed by the reduction of the free spectral range and the blueshift of the exciton-like modes with increasing pulse energy. The absence of broadening in the exciton emission further confirmed lasing at low electron-hole densities. Overall, our work paves the way for the development of novel UV devices based on high-speed slab waveguide polariton geometry operating up to room temperature and integrated into complex photonic circuits.
Article
Chemistry, Multidisciplinary
Georgy Ermolaev, Anatoly P. Pushkarev, Alexey Zhizhchenko, Aleksandr A. Kuchmizhak, Ivan Iorsh, Ivan Kruglov, Arslan Mazitov, Arthur Ishteev, Kamilla Konstantinova, Danila Saranin, Aleksandr Slavich, Dusan Stosic, Elena S. Zhukova, Gleb Tselikov, Aldo Di Carlo, Aleksey Arsenin, Kostya S. Novoselov, Sergey Makarov, Valentyn S. Volkov
Summary: In recent years, the significance of giant optical anisotropy in light manipulation has been demonstrated. However, achieving continuous tunability of optical anisotropy has remained a challenge. This study presents a solution to this problem through the chemical alteration of halogen atoms in single-crystal halide perovskites, resulting in the continuous modification of optical anisotropy. Our findings also show that halide perovskites can exhibit high optical anisotropy up to 0.6 in the visible range, the highest value among non-van der Waals materials.
Article
Multidisciplinary Sciences
Juanjuan Lu, Danila N. N. Puzyrev, Vladislav V. V. Pankratov, Dmitry V. V. Skryabin, Fengyan Yang, Zheng Gong, Joshua B. B. Surya, Hong X. X. Tang
Summary: Frequency conversion enables the generation of broadband optical frequency combs, which is crucial for precision spectroscopy and data processing applications.
NATURE COMMUNICATIONS
(2023)
Article
Nanoscience & Nanotechnology
Alexey Mikhin, Anton Shubnic, Tatiana Ivanova, Ivan Shelykh, Anton K. Samusev, Ivan Iorsh
Summary: This study shows that bulk rhenium diselenide, ReSe2, has a record high refractive index of over 5 in the near-infrared frequency range. Back focal plane reflection spectroscopy is used to extract the components of ReSe2's permittivity tensor and reveal its extreme biaxial anisotropy. The experimental data is in good agreement with the predictions of density functional theory. The combination of a large refractive index and giant optical anisotropy makes ReSe2 a promising material for all-dielectric nanophotonics in the near-infrared frequency range.
Article
Multidisciplinary Sciences
Artem N. Abramov, Igor Y. Chestnov, Ekaterina S. Alimova, Tatiana Ivanova, Ivan S. Mukhin, Dmitry N. Krizhanovskii, Ivan A. Shelykh, Ivan V. Iorsh, Vasily Kravtsov
Summary: By using local deformation of monolayer WSe2, we have successfully created high-purity single-photon emitters. Through nanoindentation and atomic force microscopy, we have identified the single-photon emitting sites and reconstructed the details of the surrounding local strain potential. The experimental results suggest that the single-photon emission is likely due to strain-induced spectral shift of dark excitonic states and their hybridization with localized states of individual defects.
NATURE COMMUNICATIONS
(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
Materials Science, Multidisciplinary
D. R. Gulevich, Ya. Zhumagulov, V. K. Kozin, I. Tokatly
Summary: We demonstrate that the poles of the dynamical exchange-correlation (xc) kernels of semiconductors and insulators reveal the analytic structure and physically relevant frequencies of the system, where counterphase motion of collective excitations occurs. This property enables the construction of simple and practically useful approximations of the dynamical xc kernel for time-dependent density functional theory (TDDFT). These kernels have simple analytic structures, can reproduce dominant excitonic features of absorption spectra, and show promise for future applications in efficient real-time calculations with TDDFT.
Article
Optics
A. V. Gorbach, M. Roiz, M. Vainio, D. V. Skryabin
Summary: Parametric conversion of ultrashort pulses is a versatile tool in nonlinear and quantum optics. In this study, the phenomenon of signal and idler trapping by an ultrashort pump pulse in a material with second- and third-order nonlinearities is investigated. It is found that the trapping regime can be achieved by balancing the characteristic length scales associated with group-velocity mismatch and second-order nonlinearity. The study also reports the transition between broadband coherent and incoherent signal and idler spectra.
Correction
Materials Science, Multidisciplinary
Yaroslav V. Zhumagulov, Vyacheslav D. Neverov, Alexander E. Lukyanov, Dmitry R. Gulevich, Andrey V. Krasavin, Alexei Vagov, Vasili Perebeinos
Article
Materials Science, Multidisciplinary
Yaroslav V. Zhumagulov, Vyacheslav D. Neverov, Alexander E. Lukyanov, Dmitry R. Gulevich, Andrey V. Krasavin, Alexei Vagov, Vasili Perebeinos
Summary: This study investigates the nonlinear dynamics of a strongly excited TMDC monolayer and shows that the presence of excitons leads to a significant enhancement of the nonlinear signal. The research also reveals that the SHG polarization angular diagram and its dependence on the driving strength are highly sensitive to the type of exciton state, highlighting the convenience of SHG spectroscopy in analyzing the fine structure of excitonic states.