Local optical responses of plasmon resonances visualised by near-field optical imaging

Hiromi Okamoto, Tetsuya Narushima, Yoshio Nishiyama, Kohei Imura

    Research output: Contribution to journalArticle

    12 Citations (Scopus)

    Abstract

    The unique optical characteristics of noble metal nanostructures have their origin principally in surface plasmon resonances. To exploit and design the unique characteristics arising from plasmons, an investigation of optical field structures adjacent to the nanostructure is of fundamental importance. As the spatial scale of the optical field structures is essentially smaller than the radiation wavelength in resonance with the plasmon, optical imaging methods that achieve spatial resolution beyond the diffraction limit of light are necessary to visualise the fields. In this article, we review the studies of direct experimental visualisation of plasmon resonances using near-field optical microscopy. We briefly describe the method of near-field optical microscopy used to study noble metal nanoparticles and show with several typical single gold nanoparticles that the spatial features of plasmon resonances, in particular the standing wave functions of the plasmons, can be directly visualised by near-field imaging. We then describe our recent efforts to visualise ultrafast dynamics in metal nanostructures following plasmonic excitation, which are based on near-field ultrafast imaging measurements. Another notable aspect of metal nanostructures that has attracted attention recently is the chirality of plasmons. Here, we describe a method and examples of near-field optical imaging and analyses of chiral plasmons excited on metal nanostructures.

    Original languageEnglish
    Pages (from-to)6192-6206
    Number of pages15
    JournalPhysical Chemistry Chemical Physics
    Volume17
    Issue number9
    DOIs
    Publication statusPublished - 2015 Mar 7

    Fingerprint

    Plasmons
    Nanostructures
    near fields
    plasmons
    Imaging techniques
    Metals
    Precious metals
    noble metals
    Optical microscopy
    metals
    microscopy
    nanoparticles
    Metal nanoparticles
    Chirality
    Surface plasmon resonance
    Wave functions
    chirality
    surface plasmon resonance
    standing waves
    Gold

    ASJC Scopus subject areas

    • Physical and Theoretical Chemistry
    • Physics and Astronomy(all)

    Cite this

    Local optical responses of plasmon resonances visualised by near-field optical imaging. / Okamoto, Hiromi; Narushima, Tetsuya; Nishiyama, Yoshio; Imura, Kohei.

    In: Physical Chemistry Chemical Physics, Vol. 17, No. 9, 07.03.2015, p. 6192-6206.

    Research output: Contribution to journalArticle

    Okamoto, Hiromi ; Narushima, Tetsuya ; Nishiyama, Yoshio ; Imura, Kohei. / Local optical responses of plasmon resonances visualised by near-field optical imaging. In: Physical Chemistry Chemical Physics. 2015 ; Vol. 17, No. 9. pp. 6192-6206.
    @article{11d1befad1274926b4b80329adc1d692,
    title = "Local optical responses of plasmon resonances visualised by near-field optical imaging",
    abstract = "The unique optical characteristics of noble metal nanostructures have their origin principally in surface plasmon resonances. To exploit and design the unique characteristics arising from plasmons, an investigation of optical field structures adjacent to the nanostructure is of fundamental importance. As the spatial scale of the optical field structures is essentially smaller than the radiation wavelength in resonance with the plasmon, optical imaging methods that achieve spatial resolution beyond the diffraction limit of light are necessary to visualise the fields. In this article, we review the studies of direct experimental visualisation of plasmon resonances using near-field optical microscopy. We briefly describe the method of near-field optical microscopy used to study noble metal nanoparticles and show with several typical single gold nanoparticles that the spatial features of plasmon resonances, in particular the standing wave functions of the plasmons, can be directly visualised by near-field imaging. We then describe our recent efforts to visualise ultrafast dynamics in metal nanostructures following plasmonic excitation, which are based on near-field ultrafast imaging measurements. Another notable aspect of metal nanostructures that has attracted attention recently is the chirality of plasmons. Here, we describe a method and examples of near-field optical imaging and analyses of chiral plasmons excited on metal nanostructures.",
    author = "Hiromi Okamoto and Tetsuya Narushima and Yoshio Nishiyama and Kohei Imura",
    year = "2015",
    month = "3",
    day = "7",
    doi = "10.1039/c4cp05951d",
    language = "English",
    volume = "17",
    pages = "6192--6206",
    journal = "Physical Chemistry Chemical Physics",
    issn = "1463-9076",
    publisher = "Royal Society of Chemistry",
    number = "9",

    }

    TY - JOUR

    T1 - Local optical responses of plasmon resonances visualised by near-field optical imaging

    AU - Okamoto, Hiromi

    AU - Narushima, Tetsuya

    AU - Nishiyama, Yoshio

    AU - Imura, Kohei

    PY - 2015/3/7

    Y1 - 2015/3/7

    N2 - The unique optical characteristics of noble metal nanostructures have their origin principally in surface plasmon resonances. To exploit and design the unique characteristics arising from plasmons, an investigation of optical field structures adjacent to the nanostructure is of fundamental importance. As the spatial scale of the optical field structures is essentially smaller than the radiation wavelength in resonance with the plasmon, optical imaging methods that achieve spatial resolution beyond the diffraction limit of light are necessary to visualise the fields. In this article, we review the studies of direct experimental visualisation of plasmon resonances using near-field optical microscopy. We briefly describe the method of near-field optical microscopy used to study noble metal nanoparticles and show with several typical single gold nanoparticles that the spatial features of plasmon resonances, in particular the standing wave functions of the plasmons, can be directly visualised by near-field imaging. We then describe our recent efforts to visualise ultrafast dynamics in metal nanostructures following plasmonic excitation, which are based on near-field ultrafast imaging measurements. Another notable aspect of metal nanostructures that has attracted attention recently is the chirality of plasmons. Here, we describe a method and examples of near-field optical imaging and analyses of chiral plasmons excited on metal nanostructures.

    AB - The unique optical characteristics of noble metal nanostructures have their origin principally in surface plasmon resonances. To exploit and design the unique characteristics arising from plasmons, an investigation of optical field structures adjacent to the nanostructure is of fundamental importance. As the spatial scale of the optical field structures is essentially smaller than the radiation wavelength in resonance with the plasmon, optical imaging methods that achieve spatial resolution beyond the diffraction limit of light are necessary to visualise the fields. In this article, we review the studies of direct experimental visualisation of plasmon resonances using near-field optical microscopy. We briefly describe the method of near-field optical microscopy used to study noble metal nanoparticles and show with several typical single gold nanoparticles that the spatial features of plasmon resonances, in particular the standing wave functions of the plasmons, can be directly visualised by near-field imaging. We then describe our recent efforts to visualise ultrafast dynamics in metal nanostructures following plasmonic excitation, which are based on near-field ultrafast imaging measurements. Another notable aspect of metal nanostructures that has attracted attention recently is the chirality of plasmons. Here, we describe a method and examples of near-field optical imaging and analyses of chiral plasmons excited on metal nanostructures.

    UR - http://www.scopus.com/inward/record.url?scp=84923253130&partnerID=8YFLogxK

    UR - http://www.scopus.com/inward/citedby.url?scp=84923253130&partnerID=8YFLogxK

    U2 - 10.1039/c4cp05951d

    DO - 10.1039/c4cp05951d

    M3 - Article

    AN - SCOPUS:84923253130

    VL - 17

    SP - 6192

    EP - 6206

    JO - Physical Chemistry Chemical Physics

    JF - Physical Chemistry Chemical Physics

    SN - 1463-9076

    IS - 9

    ER -