Near-field scanning optical microscopy: Single channel imaging of selected gold nanoparticles through two photon induced photoluminescence

Mohammad Kamal Hossain, Masahiro Kitajima, Kohei Imura, Hiromi Okamoto

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    3 Citations (Scopus)

    Abstract

    Near-field scanning optical microscopy (NSOM) is known to be a technique of choice to investigate nanometric materials and their properties beyond far-field diffraction limit resulting high spatial, spectral and temporal resolution. Here in this report, a state of art facility, aperture-NSOM was used to probe single nanoparticle, dimer, trimer and small nanoaggregate of gold nanoparticles. Shear force topography and two photon induced photoluminescence (TPI-PL) images captured simultaneously by the system facilitated to clarify the correlation between the local geometry and the emitted photon of TPI-PL. Small gold aggregates including trimer showed strong optical confinement of TPI-PL with reference to that of single gold nanoparticles. It was also evident that the interparticle gap does have a great influence in localized electromagnetic (EM) field mediated optical confinement of TPI-PL. Such observations were also supported by finite different time domain (FDTD) analysis keeping the simulation parameter nearly identical to that of experiment. FDTD simulation demonstrated that incident excitation parallel to the interparticle axis induces strong near-field distribution at the interstitials whereas out of plane excitation modifies such confinement depending on the nanometric geometry of the nanoaggregates. Such an observation is indispensable to understand the localized EM field-mediated optical confinement in surfaceenhanced spectroscopy.

    Original languageEnglish
    Title of host publicationAdvanced Materials Research
    PublisherTrans Tech Publications Ltd
    Pages118-122
    Number of pages5
    Volume938
    ISBN (Print)9783038350989
    DOIs
    Publication statusPublished - 2014

    Publication series

    NameAdvanced Materials Research
    Volume938
    ISSN (Print)10226680
    ISSN (Electronic)16628985

    Fingerprint

    Near field scanning optical microscopy
    Photoluminescence
    Photons
    Gold
    Nanoparticles
    Imaging techniques
    Electromagnetic fields
    Time domain analysis
    Geometry
    Dimers
    Topography
    Diffraction
    Spectroscopy
    Experiments

    Keywords

    • FDTD
    • Gold
    • Localized EM
    • Nano-aggregate
    • Nanoparticles
    • Near-field
    • TPI-PL

    ASJC Scopus subject areas

    • Engineering(all)

    Cite this

    Hossain, M. K., Kitajima, M., Imura, K., & Okamoto, H. (2014). Near-field scanning optical microscopy: Single channel imaging of selected gold nanoparticles through two photon induced photoluminescence. In Advanced Materials Research (Vol. 938, pp. 118-122). (Advanced Materials Research; Vol. 938). Trans Tech Publications Ltd. https://doi.org/10.4028/www.scientific.net/AMR.938.118

    Near-field scanning optical microscopy : Single channel imaging of selected gold nanoparticles through two photon induced photoluminescence. / Hossain, Mohammad Kamal; Kitajima, Masahiro; Imura, Kohei; Okamoto, Hiromi.

    Advanced Materials Research. Vol. 938 Trans Tech Publications Ltd, 2014. p. 118-122 (Advanced Materials Research; Vol. 938).

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Hossain, MK, Kitajima, M, Imura, K & Okamoto, H 2014, Near-field scanning optical microscopy: Single channel imaging of selected gold nanoparticles through two photon induced photoluminescence. in Advanced Materials Research. vol. 938, Advanced Materials Research, vol. 938, Trans Tech Publications Ltd, pp. 118-122. https://doi.org/10.4028/www.scientific.net/AMR.938.118
    Hossain MK, Kitajima M, Imura K, Okamoto H. Near-field scanning optical microscopy: Single channel imaging of selected gold nanoparticles through two photon induced photoluminescence. In Advanced Materials Research. Vol. 938. Trans Tech Publications Ltd. 2014. p. 118-122. (Advanced Materials Research). https://doi.org/10.4028/www.scientific.net/AMR.938.118
    Hossain, Mohammad Kamal ; Kitajima, Masahiro ; Imura, Kohei ; Okamoto, Hiromi. / Near-field scanning optical microscopy : Single channel imaging of selected gold nanoparticles through two photon induced photoluminescence. Advanced Materials Research. Vol. 938 Trans Tech Publications Ltd, 2014. pp. 118-122 (Advanced Materials Research).
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