Photoacoustics articles within Nature Communications

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  • Article
    | Open Access

    Spectroscopic gas sensing with high sensitivity and selectivity finds an increasing number of applications. Here, the authors report an approach to ultrasensitive multiplexed gas sensing by integrating dual-comb spectroscopy with cavity optomechanics.

    • Xinyi Ren
    • , Jin Pan
    •  & Heping Zeng

  • Article
    | Open Access

    Optoacoustic super-resolution at millimeter-scale depths has been impeded by the strong background absorption from blood cells. Here, the authors use dichloromethane microdroplets with high optical absorption and demonstrate 3D microangiography of the mouse brain via optoacoustic localization.

    • Xosé Luís Deán-Ben
    • , Justine Robin
    •  & Daniel Razansky

  • Article
    | Open Access

    Optoacoustic imaging is mostly performed in the time domain. Here the authors demonstrate frequency wavelength multiplexed optoacoustic tomography that can operate at multiple wavelengths simultaneously and offers signal-to-noise ratio advantages over time domain methods.

    • Antonios Stylogiannis
    • , Ludwig Prade
    •  & Vasilis Ntziachristos

  • Article
    | Open Access

    Unsuspended optomechanical systems might enable unique applications for quantum sensing and transduction. Here, the authors demonstrate a two-dimensional slab-on-substrate optomechanical crystal empowered by mechanical bound states in the continuum.

    • Shengyan Liu
    • , Hao Tong
    •  & Kejie Fang

  • Article
    | Open Access

    High-resolution photoacoustic tomography is challenging due to reduced efficiency of miniaturized piezoelectric elements. Here, the authors fabricate a miniaturized silicon-photonics acoustic detector coated with a sensitivity-enhancing elastomer, and demonstrate high-resolution in vivo imaging.

    • Yoav Hazan
    • , Ahiad Levi
    •  & Amir Rosenthal

  • Article
    | Open Access

    Fluorescent imaging in the second biological window has advantages for in vivo applications. Here, the authors synthesise a molecular nanoprobe which activates upon binding H2O2, generating both strong fluorescent NIR-II emission and ultrasound signal for multi-mode imaging of inflammatory diseases.

    • Junjie Chen
    • , Longqi Chen
    •  & Yanli Zhao

  • Article
    | Open Access

    Optoacoustic sensing applications are limited by weak electrostrictive force. Here, the authors induce photothermally acoustic vibrations with a focused pulsed laser, and via scanning demonstrate sensing of acoustic impedance at 10 µm spatial resolution, allowing for visualisation of diffusion dynamics.

    • Yizhi Liang
    • , Huojiao Sun
    •  & Bai-Ou Guan

  • Article
    | Open Access

    Here, the authors show that the resolution and speed limitations in broadband photo-acoustic spectroscopy can be overcome by combining dual-comb spectroscopy with photo-acoustic detection. This enables broadband detection and allows for rapid and sensitive multi-species molecular analysis across all wavelengths of light.

    • Thibault Wildi
    • , Thibault Voumard
    •  & Tobias Herr

  • Article
    | Open Access

    Here, the authors demonstrate acousto-optic modulation of silicon nitride microring resonators using high-overtone bulk acoustic wave resonances, allowing modulation in the GHz range via acoustic waves. As an application, an optical isolator is demonstrated with 17 dB non-reciprocity.

    • Hao Tian
    • , Junqiu Liu
    •  & Sunil A. Bhave

  • Article
    | Open Access

    Characterizing the total impulse response (TIR) of photoacoustic microscopes has been challenging due to difficulties distributing appropriate point sources. Here, the authors present a method for 3D generation of spatially-distributed optoacoustic point sources and show that subsequent TIR correction results in improved image quality.

    • Markus Seeger
    • , Dominik Soliman
    •  & Vasilis Ntziachristos

  • Article
    | Open Access

    The exact mechanism of momentum conversion from light to an object has varied descriptions in the literature and experimental verifications are difficult. Here the authors do an in-depth experimental and numerical study of the momentum dynamics of elastic waves in a dielectric mirror hit by a pulsed laser beam.

    • Tomaž Požar
    • , Jernej Laloš
    •  & Nelson G. C. Astrath

  • Article
    | Open Access

    Conventional distributed Brillouin sensing allows real-time sampling at high spatial resolution, but is so far restricted to measuring quantities inside the fibre core. Here, Chow et al. demonstrate a distributed forward Brillouin sensor that is sensitive to quantities outside the fibre bulk.

    • Desmond M. Chow
    • , Zhisheng Yang
    •  & Luc Thévenaz

  • Article
    | Open Access

    Chiral transport can provide robustness against disorder, resulting in improved resonant modes for sensing and metrology. Here, Kim et al. demonstrate chiral phonon transport, disorder suppression and anomalous cooling without damping in an asymmetrically-pumped optomechanical system.

    • Seunghwi Kim
    • , Xunnong Xu
    •  & Gaurav Bahl

  • Article
    | Open Access

    Optomechanical systems could form logic gates, but key requirements are two stable static states and the ability to switch between them. Here, the authors observe radiation-pressure induced buckling transitions in an optomechanical system, and control this transition by varying laser power and detuning.

    • H. Xu
    • , U. Kemiktarak
    •  & J. M. Taylor

  • Article
    | Open Access

    Electrically driven acousto-optic light modulators are limited to frequencies of a few hundred megahertz and are typically no smaller than a few micrometres. Here, the authors demonstrate gigahertz acousto-optic conversion of light polarization in a region of a few nanometres using pulsed laser stimulation of a ferroelectric.

    • Mariusz Lejman
    • , Gwenaelle Vaudel
    •  & Pascal Ruello

  • Article
    | Open Access

    The interaction between light and acoustic phonons is radically modified in sub-wavelength photonic structures. Here, the authors engineer the optical and acoustic modes to perfectly cancel the two interaction mechanisms—the photo-elastic and moving-boundary effects—which leads to Brillouin self-cancellation.

    • O. Florez
    • , P. F. Jarschel
    •  & P. Dainese

  • Article
    | Open Access

    Phonons—crystal lattice vibrations—interact with crystal defects on the nanometre spatial scale and femtosecond timescale. Here, the authors demonstrate direct, real-space imaging of the nucleation, emergence and dispersion of single-phonon wavefronts at individual atomic-scale defects in semiconductors.

    • Daniel R. Cremons
    • , Dayne A. Plemmons
    •  & David J. Flannigan

  • Article
    | Open Access

    Aerosol droplets have significant effects on atmospheric photochemistry, however measuring absorption from single droplets is a challenge. Here, the authors report a method to measure absorption of nanodroplets with attolitre sensitivity, showing rate enhancements for light focusing in photolysis reactions.

    • Johannes W. Cremer
    • , Klemens M. Thaler
    •  & Ruth Signorell

  • Article
    | Open Access

    Dynamic control of components is required for large-scale quantum photonic networks. Here, Kapfingeret al. show dynamic control of the interaction between two coupled photonic crystal nanocavities forming a photonic molecule. Tuning is achieved by using an electrically generated radio frequency surface acoustic wave.

    • Stephan Kapfinger
    • , Thorsten Reichert
    •  & Hubert J. Krenner

  • Article |

    With wavefront shaping, imaging through scattering walls is possible, but this technique requires generating feedback from behind the wall. Here, Conkeyet al. use photoacoustic feedback for wavefront optimization for sub-acoustic resolution imaging behind a scattering wall with an improved signal-to-noise ratio.

    • Donald B. Conkey
    • , Antonio M. Caravaca-Aguirre
    •  & Rafael Piestun

  • Article |

    The mechanical properties of metal nanostructures depend on nature of the adhesion layer attaching it to a substrate. Chang et al.find that the properties of phonons in gold nanodisks vary with adhesion layer thickness, and that this response can act as a probe of the metallic composition of the disk.

    • Wei-Shun Chang
    • , Fangfang Wen
    •  & Stephan Link

  • Article
    | Open Access

    Stimulated Brillouin scattering is a non-linear interaction that allows light to be stored as coherent acoustic waves. Here, the authors report on Brillouin scattering-induced transparency in an optical microresonator whose high quality allows for long-lifetime non-reciprocal light storage.

    • Chun-Hua Dong
    • , Zhen Shen
    •  & Guang-Can Guo

  • Article |

    The generation of strain in a material using light is of relevance for ultrasonic devices. Here, the authors observe a large, ultrafast photo-induced shear strain in BiFeO3at room temperature, suggesting promising uses of such oxides for high-frequency acoustic devices.

    • Mariusz Lejman
    • , Gwenaelle Vaudel
    •  & Pascal Ruello

  • Article |

    The nanometre length scale of plasmonic structures leads to vibrational dynamics at high frequencies, which could be exploited for sensitive optical detectors. O'Brien et al. show that they can detect spatial properties of phonon modes in multimodal plasmonic structures, revealing complex nanomechanical dynamics.

    • Kevin O’Brien
    • , N. D. Lanzillotti-Kimura
    •  & Xiang Zhang

  • Article
    | Open Access

    The Aharonov–Bohm effect describes the influence of an electromagnetic vector potential on the phase of a charged particle. Here, Li et al.demonstrate that photon–phonon interactions can lead to the Aharonov–Bohm effect also for the electrically neutral photons.

    • Enbang Li
    • , Benjamin J. Eggleton
    •  & Shanhui Fan

  • Article
    | Open Access

    Phonon lasers are the acoustic equivalent to optical lasers. Here Maryam and colleagues study the dynamics of semiconductor phonon lasers operating in the terahertz frequency regime, and show that these dynamics are similar to that of comparable optical lasers.

    • W. Maryam
    • , A. V. Akimov
    •  & A. J. Kent

  • Article |

    A dual-contrast agent has been developed for combined ultrasound and photoacoustic imaging. This agent uses vaporization for ultrasound contrast enhancement and photoacoustic signal generation, providing significantly higher signals than thermal expansion, the most commonly used photoacoustic mechanism.

    • Katheryne Wilson
    • , Kimberly Homan
    •  & Stanislav Emelianov

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