Optical spectroscopy articles within Nature Communications

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  • Article
    | Open Access

    Despite the distinct electronic properties of the wide variety Cm3+ compounds that have been prepared to date, no singlecrystal structural characterization of a complex containing a Cm−C bond has been reported. Here the authors report the synthesis of a Cm complex bearing trimethylsilylcyclopentadienyl and 4,4’-bipyridine ligands with a low energy emission and identify the 4,4’-bipyridine ligand as the primary quenching agent.

    • Brian N. Long
    • , María J. Beltrán-Leíva
    •  & Thomas E. Albrecht-Schönzart

  • Article
    | Open Access

    Compact atomic clocks and atom interferometers are desired for on-chip integration. Here the authors demonstrate a chip-scale atomic beam of 87Rb atoms and its application as an atomic beam clock

    • Gabriela D. Martinez
    • , Chao Li
    •  & William R. McGehee

  • Article
    | Open Access

    Excess of l-amino acids in meteorites suggests an extraterrestrial origin of biomolecular homochirality, which may stem from chiral light-matter interactions. Here the authors support this hypothesis with asymmetric photolysis experiments on racemic isovaline films, showing that circularly polarized starlight can produce l-enantiomeric excesses that can be amplified during parent bodies’ alteration.

    • Jana Bocková
    • , Nykola C. Jones
    •  & Cornelia Meinert

  • Article
    | Open Access

    Coherent Stokes Raman scattering (CSRS) has never been explored previously for chemical imaging due to a strong fluorescence background. Here, the authors demonstrate the first fluorescence-free CSRS laser scanning microscope and predict CSRS’ unique backscattering properties.

    • Sandro Heuke
    •  & Hervé Rigneault

  • Article
    | Open Access

    Spontaneous Raman scattering is classically understood as an incoherent process. Here, the authors demonstrate that macroscopic quantum coherence among billions of vibrating molecules in a liquid is generated when single photon detection and single spatio-temporal mode excitation are implemented.

    • Valeria Vento
    • , Santiago Tarrago Velez
    •  & Christophe Galland

  • Article
    | Open Access

    The mixing between Frenkel and charge-transfer characters in molecular excitons is difficult to analyze. Here, the authors demonstrate the onset and evolution of the mixing using 2D perylene molecular crystals by measuring the reorientation of emission transition dipoles with varying thicknesses.

    • Dogyeong Kim
    • , Sol Lee
    •  & Sunmin Ryu

  • Article
    | Open Access

    Electron screening is crucial to interpret inelastic X-ray scattering experiments in materials. Here the authors use a combined analysis based on the Bethe-Salpeter equation and time-dependent density functional theory to calculate the dielectric function and obtain the band gap of liquid water.

    • Igor Reshetnyak
    • , Arnaud Lorin
    •  & Alfredo Pasquarello

  • Article
    | Open Access

    2D materials are promising substrates for surface-enhanced Raman scattering (SERS)-based molecular sensing, but their performance is usually inferior to their plasmonic counterparts. Here, the authors report the synthesis of 1D/2D WO3-x/WSe2 heterostructures, showing high molecular sensitivity associated to ultrafast charge transfer timescales of ~1 ps.

    • Qian Lv
    • , Junyang Tan
    •  & Ruitao Lv

  • Article
    | Open Access

    Two-dimensional charge density waves in layered semiconductors may exhibit chirality. Here, the authors utilize thermal annealing to reversibly switch the in-plane chirality of charge density waves in 1T-TaS2 and demonstrate a vertical chirality-locking effect between the van der Waals-stacked layers.

    • Yan Zhao
    • , Zhengwei Nie
    •  & Jin Zhang

  • Article
    | Open Access

    The authors induce a nanoscale strain gradient in monolayer MoS2 suspended on a waveguide and take advantage of propagating surface plasmon polaritons to localize hot electrons in the suspended area. They funnel excitons in the waveguide, facilitating all-optical control of exciton-to-trion conversion.

    • Hyeongwoo Lee
    • , Yeonjeong Koo
    •  & Kyoung-Duck Park

  • Article
    | Open Access

    IR spectra are great for characterizing single-crystals and large nanoparticles, but not for highly dispersed heterogeneous catalysts made up of single-atoms and ultra-small clusters. To solve this, the authors developed a method to generate synthetic IR spectra using data-based approaches and physics-driven surrogate models.

    • Vinson Liao
    • , Maximilian Cohen
    •  & Dionisios G. Vlachos

  • Article
    | Open Access

    Direct spectroscopic probes of the impact of structure on dynamical processes in liquids remain scarce. Here, the authors use molecular dynamics simulations to show that the correlation between vibrational coupling and the local tetrahedral structure of liquid water can be studied via hybrid terahertz- and infrared-Raman spectroscopy.

    • Tomislav Begušić
    •  & Geoffrey A. Blake

  • Article
    | Open Access

    The authors develop an imaging-based intelligent spectrometer on a plasmonic “rainbow” chip. It can accurately and precisely determine the spectroscopic and polarimetric information of the illumination spectrum using a single image assisted by suitably trained deep learning algorithms.

    • Dylan Tua
    • , Ruiying Liu
    •  & Qiaoqiang Gan

  • Article
    | Open Access

    Despite their high brightness and long-lived emission, lanthanide based circularly polarised luminophores have not been fully exploited for real-life application. Here, the authors present an all solid-state circularly polarised luminescence camera to facilitate ad hoc time-resolved enantioselective differential chiral contrast-based one-shot photography that can be applied in life and material sciences.

    • Davide F. De Rosa
    • , Patrycja Stachelek
    •  & Robert Pal

  • Article
    | Open Access

    Despite increasing interest in organic room temperature phosphorescence, it can still be challenging to determine mechanism and develop practical applications. Here, the authors report room temperature phosphorescent systems from chiral components, with strong phosphorescence observed only when both host and guest had the same chirality.

    • Biao Chen
    • , Wenhuan Huang
    •  & Guoqing Zhang

  • Article
    | Open Access

    Single-molecule 3D tracking is critical to understand macromolecular dynamics but achieving this at a sub-millisecond resolution remains challenging. Here the authors present a 3D tracking method based on cross-entropy minimization and the true excitation point spread function.

    • Elias Amselem
    • , Bo Broadwater
    •  & Johan Elf

  • Article
    | Open Access

    Intercalation of protons in 2D materials plays a major role for several applications in energy storage and conversion. Here, the authors show that protons intercalated in Ti3C2Tx MXene interlayer during electrochemical cycling have a different hydration structure than protons in bulk water.

    • Mailis Lounasvuori
    • , Yangyunli Sun
    •  & Tristan Petit

  • Article
    | Open Access

    The authors present an artifact-free circularly polarized luminescence spectrophotometer using a single camera and two polarization encoding paths. The spectra are measured in a few seconds without the need of calibration by inverting the role of the paths.

    • Bruno Baguenard
    • , Amina Bensalah-Ledoux
    •  & Stéphan Guy

  • Article
    | Open Access

    The authors introduce and demonstrate cross-comb spectroscopy in the mid-infrared as a variant of dual-comb spectroscopy. It provides enhanced performance and allows mid-infrared spectral information to be obtained by near-infrared detection.

    • Mingchen Liu
    • , Robert M. Gray
    •  & Alireza Marandi

  • Article
    | Open Access

    Coupling electromagnetic radiation with matter is promising to tailor optoelectronics properties of functional materials. Here, the authors demonstrate that internal fields induced by coherent lattice motions can be used to control transient excitonic optical response in halide perovskite crystals.

    • Xuan Trung Nguyen
    • , Katrin Winte
    •  & Antonietta De Sio

  • Article
    | Open Access

    Diagnosis of bile duct cancer often occur in advanced stages, leading to poor survival. Here, the authors combine light scattering and diffuse reflectance spectroscopies in a minimally invasive endoscopic technique for directly assessing the malignant potential of the bile duct lining, and demonstrate 97% detection accuracy.

    • Douglas K. Pleskow
    • , Mandeep S. Sawhney
    •  & Lev T. Perelman

  • Article
    | Open Access

    The authors investigate whether strong light-matter coupling can alter the nonlinear optical response of molecules inside a microcavity. Focusing on electroabsorption as a model third order nonlinearity, they find that apparent discrepancies between experiment and classical transfer matrix modeling arise from dark states in the system and are not a sign of new physics in the strong coupling regime.

    • Chiao-Yu Cheng
    • , Nina Krainova
    •  & Noel C. Giebink

  • Article
    | Open Access

    The authors introduce Bond-selective Intensity Diffraction Tomography, a computational mid-infrared photothermal microscopy technique based on a standard bright-field microscope and an add-on pulsed light source. It recovers both mid-infrared spectra and bond-selective 3D refractive index maps based on intensity-only measurements.

    • Jian Zhao
    • , Alex Matlock
    •  & Ji-Xin Cheng

  • Article
    | Open Access

    Physical or chemical reactions driven by light absorption are ruled by excited-state multidimensional energy surfaces displaced with respect to the ground state. Here the authors introduce a nonlinear Raman experiment to access an elusive aspect of the excited-state displacements: their sensed directions relative to the ground-state.

    • Giovanni Batignani
    • , Emanuele Mai
    •  & Tullio Scopigno

  • Article
    | Open Access

    The optoelectronic performance of lead halide perovskite in highfluence applications are hindered by heterogeneous multi-polaron interactions in the nanoscale. Here, Nishda et al. spatially resolve sub-ns relaxation dynamics on the nanometer scale by ultrafast infrared pumpprobe nanoimaging.

    • Jun Nishida
    • , Peter T. S. Chang
    •  & Markus B. Raschke

  • Article
    | Open Access

    The Zundel [H(H2O)2]+ and Eigen [H(H2O)4]+ cations exhibit radicallly different infrared spectra and are the limiting dynamical structures involved in proton mobility in liquid water. Here, the authors find through quantum dynamics simulations that two polarized water molecules and a proton suffice to explain the key spectroscopic features connected to proton mobility for both species.

    • Markus Schröder
    • , Fabien Gatti
    •  & Oriol Vendrell

  • Article
    | Open Access

    Here, the authors use quantitative ultrafast interferometric pump-probe microscopy to track photoexcitations with sub-10 nm spatial precision in three dimensions and 15 fs temporal resolution to study the spatiotemporal dynamics of singlet exciton fission in polycrystalline pentacene films.

    • Arjun Ashoka
    • , Nicolas Gauriot
    •  & Akshay Rao

  • Article
    | Open Access

    Energy transfer between the electromagnetic field and atoms or molecules is fundamentally interesting. Here the authors demonstrate stepwise energy transfer between broadband mid-infrared optical pulses and vibrating methylsulfonylmethane molecules in aqueous solution.

    • Martin T. Peschel
    • , Maximilian Högner
    •  & Ioachim Pupeza

  • Article
    | Open Access

    A molecular-level understanding of the Au-catalyzed CO oxidation on a fast time-resolved scale is still lacking. Here the authors monitor the rapid dynamic changes during CO oxidation over Au/TiO2 using in situ DRIFTS and UV-Vis spectroscopy, and reveal that the catalyst undergoes a surprising structural change at the beginning of the reaction.

    • Xianwei Wang
    • , Arnulf Rosspeintner
    •  & Thomas Bürgi

  • Article
    | Open Access

    Ultrafast action spectroscopies of organic optoelectronic devices reveal that the formation of bound exciton state occurs as fast as 10 fs. Excitons having excess energy can dissociate spontaneously within 50-fs before acquiring bound character.

    • Marios Maimaris
    • , Allan J. Pettipher
    •  & Artem A. Bakulin

  • Article
    | Open Access

    Tip-enhanced vibrational spectroscopy at room temperature is complicated by molecular conformational dynamics, photobleaching, contaminations, and chemical reactions in air. This study demonstrates that a sub-nm protective layer of Al2O3 provides robust conditions for probing single-molecule conformations.

    • Mingu Kang
    • , Hyunwoo Kim
    •  & Kyoung-Duck Park

  • Article
    | Open Access

    Infrared spectroscopy with plasmonic nanoantennas is limited by small overlap between molecules and hot spots, and sharp resonance peaks. The authors demonstrate spectral multiplexing of hook nanoantennas with gradient dimensions as ultrasensitive vibrational probes in a continuous ultra-broadband region and utilize machine learning for enhanced sensing performance.

    • Zhihao Ren
    • , Zixuan Zhang
    •  & Chengkuo Lee

  • Article
    | Open Access

    Achieving high output powers in dual-comb sources is important for possible applications like deep UV high resolution spectroscopy. Here the authors demonstrate a fully passive scheme of generating a set of high-power dual-combs from a thin-disc gain medium.

    • Kilian Fritsch
    • , Tobias Hofer
    •  & Oleg Pronin

  • Article
    | Open Access

    MnBi2Te4, referred to as MBT, is a van der Waals material combining topological electron bands with magnetic order. Here, Lujan et al study collective spin excitations in MBT, and show that magnetic fluctuations increase as samples reduce in thickness, implying less robust magnetic order.

    • David Lujan
    • , Jeongheon Choe
    •  & Xiaoqin Li

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