Nonlinear optics articles within Nature Communications

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  • Article
    | Open Access

    Stark spectroscopy of molecules in liquid solutions was once challenging due to orientation effects, solved by freezing but limiting ambient studies. Now, THz Stark spectroscopy with intense terahertz pulses enables dynamic analysis of molecules in both non-polar and polar solvents at any temperature, advancing conventional methods.

    • Bong Joo Kang
    • , Egmont J. Rohwer
    •  & Thomas Feurer

  • Article
    | Open Access

    Surface acoustic wave devices enable modern electronics and are desirable for quantum systems. Here the authors access and control these devices optically, enabling high acoustic quality factors, materials spectroscopy, and hybrid quantum systems.

    • Arjun Iyer
    • , Yadav P. Kandel
    •  & William H. Renninger

  • Article
    | Open Access

    Achieving acoustic waveguides with low loss, tailorability, and easy fabrication is a considerable challenge. Here, the authors introduce suspended anti-resonant acoustic waveguides with superior confinement and high selectivity of acoustic modes, supporting both forward and backward SBS on chip.

    • Peng Lei
    • , Mingyu Xu
    •  & Xiaopeng Xie

  • Article
    | Open Access

    Optical recurrent neural networks present a unique challenge for photonic machine learning. Here, the authors experimentally show the first optoacoustic recurrent operator based on stimulated Brillouin scattering which may unlock a new class of optical neural networks with recurrent functionality.

    • Steven Becker
    • , Dirk Englund
    •  & Birgit Stiller

  • Article
    | Open Access

    Here the authors demonstrate a broadband nonlinear optical diode effect and its electric control in the magnetic Weyl semimetal CeAlSi. Their findings advance ongoing research to identify novel optical phenomena in topological materials.

    • Christian Tzschaschel
    • , Jian-Xiang Qiu
    •  & Su-Yang Xu

  • Article
    | Open Access

    Synthesising chemically stable divalent lanthanide compounds is still faced by great challenges. Here, by using octahedra coupling tetrahedra single/double chains to construct an octahedral crystal field, authors synthesised a stable crystalline La(II)-chalcogenide, LaMg6Ga6S16.

    • Yujie Zhang
    • , Jiale Chen
    •  & Hongwei Yu

  • Comment
    | Open Access

    I argue that a surface emitting laser that remains single mode irrespective of its size, a scale-invariant laser, should of necessity also waste light at the edge. This is a fundamental departure from the Schawlow-Townes two-mirror strategy that keeps light away from mirrors and edges to preserve gain and minimize loss. The strategy was implemented in the recent discovery of the Berkeley Surface Emitting Laser (BerkSEL).

    • Boubacar Kanté

  • Article
    | Open Access

    Principal optical axes define light-matter interactions in crystals and they are usually assumed to be stationary. Here, the authors report the observation of wavelength-dependent principal optical axes in ternary van der Waals crystals (ReS2 and ReSe2), leading to wavelength-switchable propagation directions of their waveguide modes.

    • Georgy A. Ermolaev
    • , Kirill V. Voronin
    •  & Kostya S. Novoselov

  • Article
    | Open Access

    Spin-orbit interaction, and the associated phenomena, is commonly observed in crystalline structure pumped with circularly polarised beam. Here, the authors showed that this is not the case, and used nonlinear thin film to produce vortex beams of second-harmonic light.

    • Domenico de Ceglia
    • , Laure Coudrat
    •  & Costantino De Angelis

  • Article
    | Open Access

    Applications of spontaneous symmetry breaking are hindered by unavoidable imperfections. Here, the authors reveal how a phase defect provides topological robustness to this process, enabling a bias free realization without fine tuning of parameters.

    • Stéphane Coen
    • , Bruno Garbin
    •  & Julien Fatome

  • Article
    | Open Access

    Electric modulation of second harmonic generation finds applications in integrated photonics. Here, authors introduce electric field-induced second harmonic generation by polar skyrmions in PbTiO3/SrTiO3 superlattices with giant modulation depth.

    • Sixu Wang
    • , Wei Li
    •  & Qian Li

  • Article
    | Open Access

    Differential absorption of polarized light, called dichroism, does not exist in amorphous solids due to the disordered arrangements of atoms. Here, the authors demonstrate that dichroism is intrinsic to all solids and can be controlled using helical light beams carrying orbital angular momentum.

    • Ashish Jain
    • , Jean-Luc Bégin
    •  & Ravi Bhardwaj

  • Article
    | Open Access

    The authors investigate light beam propagation in multimode optical fibers, considering linear random mode coupling and Kerr nonlinearity. They utilize a 3D mode decomposition technique, enabling them to accurately characterize modal distributions over extended lengths of graded-index fiber.

    • Mario Zitelli
    • , Fabio Mangini
    •  & Stefan Wabnitz

  • Article
    | Open Access

    Nonlinear epsilon-near-zero nanodevices are attractive solutions for large-scale integrated system-on-chips yet heat genearation upon operation affects their performance. Here, the authors studied the linear and nonlinear thermo-optic effects in the indium tin oxide, commonly used material for this system.

    • Jiaye Wu
    • , Marco Clementi
    •  & Camille-Sophie Brès

  • Article
    | Open Access

    Topological photonics could impact the scalability of integrated photonics, but it has shown limited reconfigurability to date. Here, the authors demonstrate reprogrammable integrated photonics as a nearly universal platform for topological models.

    • Mehmet Berkay On
    • , Farshid Ashtiani
    •  & Andrea Blanco-Redondo

  • Article
    | Open Access

    The intrinsic photovoltaic effect (IPVE) in noncentrosymmetric materials has the potential to overcome the limitations of traditional photovoltaic devices. Here, the authors report the observation of a strong and gate-tunable IPVE in 1D grain boundaries of a van der Waals semiconductor, ReS2.

    • Yongheng Zhou
    • , Xin Zhou
    •  & Xiaolong Chen

  • Article
    | Open Access

    Here the authors demonstrate a universal approach to achieve turnkey dissipative Kerr soliton (DKS) frequency comb. Phase insensitivity, self-healing capability, deterministic selection of DKS state, and access to ultralow noise are all successfully accomplished.

    • Mingming Nie
    • , Jonathan Musgrave
    •  & Shu-Wei Huang

  • Article
    | Open Access

    The authors report on the experimental observation and characterization of exceptional points above the lasing threshold in photonic crystal nanocavities.

    • Kaiwen Ji
    • , Qi Zhong
    •  & Alejandro M. Yacomotti

  • Article
    | Open Access

    High-dimensional quantum states allow for several advantages in quantum communication, but protocols such as teleportation require additional entangled photons as the dimension increases. Here, the authors show how to transport a high-dimensional quantum state from a bright coherent laser field to a single photon, using two entangled photons as the quantum channel.

    • Bereneice Sephton
    • , Adam Vallés
    •  & Andrew Forbes

  • Article
    | Open Access

    The authors propose electron-positron creation by scattering of gamma-rays and polaritons, enabling the synthesis of ultrafast, localized positron sources and introducing the possibility to exploit nanophotonics for particle physics.

    • Valerio Di Giulio
    •  & F. Javier García de Abajo

  • Article
    | Open Access

    The authors introduce and demonstrate experimentally a novel fundamental property of nonlinear multimode optical systems, named mode rejection. This paves the way towards a more general idea of all-optical mode control and its related applications.

    • Kunhao Ji
    • , Ian Davidson
    •  & Massimiliano Guasoni

  • Article
    | Open Access

    Nonlinear optical processes like higher-order harmonic generation in solids depend on several factors. Here the authors explore the optical nonlinearity of hexagonal boron nitride and find that enhanced nonlinearity is due to electron-phonon and phonon-polariton couplings.

    • Jared S. Ginsberg
    • , M. Mehdi Jadidi
    •  & Alexander L. Gaeta

  • Article
    | Open Access

    Mie resonances are typically manipulated through varying nanostructure shape/size. Here, authors found that Gaussian beam displacement excites higher-order multipolar modes, not accessible by plane wave, featuring maximal linear and nonlinear scattering efficiency when the focus is misaligned.

    • Yu-Lung Tang
    • , Te-Hsin Yen
    •  & Shi-Wei Chu

  • Article
    | Open Access

    Laser machining can modify and reshape materials on the scale comparable to light’s wavelength. Here, authors use tailored microstructures to push the limit of laser machining to a scale that is almost 100 times smaller than a wavelength of light.

    • Maxim R. Shcherbakov
    • , Giovanni Sartorello
    •  & Gennady Shvets

  • Article
    | Open Access

    In this work the authors develop a Random optical parametric oscillator - the parametric analogous of random lasers. This system shows improved key metrics like tuneable repetition rates, tuneable pulse duration, inter-pulse coherence as well as simpler configuration compared with standard systems.

    • Pedro Tovar
    • , Jean Pierre von der Weid
    •  & Xiaoyi Bao

  • Article
    | Open Access

    There are many potential applications for non-centrosymmetric molecular crystals, but due to their typical brittle nature, efficiency of applications declines on prolonged use. Here, the authors report an autonomous self-healing ability of dibenzoate derivative single crystals that can retain its non-linear optical response.

    • Saikat Mondal
    • , Pratap Tanari
    •  & C. Malla Reddy

  • Article
    | Open Access

    Here the authors provide the experimental demonstration of a widely tunable integrated frequency comb source unlocking the spectrum from the visible to the mid-infrared in a thin-film lithium niobate platform.

    • Arkadev Roy
    • , Luis Ledezma
    •  & Alireza Marandi

  • Article
    | Open Access

    Dissipative optomechanics, once limited to low frequencies, now operates in a sideband-resolved regime, reshaping optical and mechanical spectra and paving the way for the individual addressing of different mechanical modes in a single device.

    • André G. Primo
    • , Pedro V. Pinho
    •  & Thiago P. Mayer Alegre

  • Article
    | Open Access

    Rouge waves have been observed in a number of complex systems, but not in biological structures. Here, the authors report the observation of optical rouge waves manifesting in tumor-cell spheroids when illuminated by randomly modulated laser beams.

    • Davide Pierangeli
    • , Giordano Perini
    •  & Claudio Conti

  • Article
    | Open Access

    The bulk photovoltaic effect (BPVE) is a nonlinear optical effect offering a promising approach to overcome the limitations of conventional photovoltaics. Here, the authors report the observation of BPVE-induced photocurrents at the edges of 2D semiconductors embedded in various van der Waals heterostructures.

    • Zihan Liang
    • , Xin Zhou
    •  & Xiaolong Chen

  • Article
    | Open Access

    A microwave-rate soliton microcomb whose repetition rate can be modulated at 75 MHz. Moreover, the repetition rate can be locked to an external microwave reference by direct injection locking or feedback locking without external modulation.

    • Yang He
    • , Raymond Lopez-Rios
    •  & Qiang Lin

  • Article
    | Open Access

    Squeezed light allows for quantum-enhanced, sub-shot-noise sensing, but its generation and use on a chip has so far remained elusive. Here, the authors fill this gap by demonstrating a thin-film lithium-niobate-based integrated quantum optical sensor, which beats shot-noise-limited SNR by ~ 4%.

    • Hubert S. Stokowski
    • , Timothy P. McKenna
    •  & Amir H. Safavi-Naeini

  • Article
    | Open Access

    Ferroelectric Nematic Liquid Crystals (FNLCs) have potential in applications due to their unique combination of fluidity, spontaneous polarization, large dielectric permittivity, and second-order non-linear optical properties. Sebastián et al. show the patterning of electric polarization in FNLCs by photoalignment which exploit flexoelectric coupling between polarization and splay director deformations.

    • Nerea Sebastián
    • , Matija Lovšin
    •  & Alenka Mertelj

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