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Personal profile

Research interests

My current research focuses on nanoscale functional imaging and spectroscopy to enable investigation of the spatial, temporal and polarization profiles of ultrafast optical excitation fields that maximize spatial resolution, sensitivity and throughput as is needed to achieve further breakthroughs in biology and materials science.

This interest in exploring and actively controlling physical and optical processes at nanometer length scales is what has motivated my research from the start of my career. The underpinning technology in doing so has primarily been scanning probe microscopy as it allows a fundamental and detailed understanding of local physical properties to be obtained without being limited by the wavelength of light. Over the years I have developed an expertise in Near-Field Scanning Optical Microscopy (both collection and excitation mode), Interferometry, UHV-STM, single molecule detection, self-assembly on surfaces, electromagnetism of emitters in layered media, 2D photonic crystals, theoretical modeling of pulse propagation and the use of ultrafast optical techniques.

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Research Output

  • 39 Article (Academic Journal)
  • 1 Conference Contribution (Conference Proceeding)

On the complex point spread function in interferometric cross-polarisation microscopy

Miles, B. T., Hong, X. & Gersen, H., 20 Jan 2015, In : Optics Express. 23, 2, p. 1232-1239 8 p.

Research output: Contribution to journalArticle (Academic Journal)

Open Access
  • 9 Citations (Scopus)
    439 Downloads (Pure)

    Combining near-field scanning optical microscopy with spectral interferometry for local characterization of the optical electric field in photonic structures

    Tragardh, J. & Gersen, H., 15 Jul 2013, In : Optics Express. 21, 14, p. 16629-16638

    Research output: Contribution to journalArticle (Academic Journal)

  • 3 Citations (Scopus)

    A molecular conformational change induced self-assembly: from randomness to order

    Xu, W., Zhang, C., Gersen, H., Sun, Q., Kong, H., Dong, L., Sheng, K., Tan, Q., Laegsgaard, E. & Besenbacher, F., 17 Apr 2013, In : Chemical Communications. 3 p.

    Research output: Contribution to journalArticle (Academic Journal)

  • 3 Citations (Scopus)

    Supervised Work

    Characterising Plasmonic Nanostructures with Interferometric Cross Polarised Microscopy

    Author: Greenwood, A. B., 23 Jan 2020

    Supervisor: Gersen, H. (Supervisor)

    Student thesis: Doctoral ThesisDoctor of Philosophy (PhD)

    Structural colour in plants and algae

    Author: Masters, N., 23 Jan 2020

    Supervisor: Whitney, H. M. (Supervisor), Oulton, R. (Supervisor), Gersen, H. (Supervisor) & Cryan, M. J. (Supervisor)

    Student thesis: Doctoral ThesisDoctor of Philosophy (PhD)