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Jean-Marie Poumirol Seminar

"CEMES seminars" - Seminar open to all - coffee at 10:30 am

"Scattering-type scanning near-field optical microscopy: spectroscopic imaging with spatial resolution below the diffraction limit."

Jean-Marie Poumirol


Infrared optical spectroscopy is one of the most informative methods in advanced materials research, unfortunately the large wavelength of the light strongly limits the spatial resolution. Scattering-type scanning near-field optical microscopy provides access to super-resolution spectroscopic imaging of the surfaces of a variety of materials and nanostructures [1]. It allows ultrabroadband optical (0.5–3000 μm) nano-imaging, and nanospectroscopy with fine spatial (<10 nm), spectral (<1 cm−1) [2], and temporal (<10 fs) resolution [3]. In this talk I will introduce s-SNOM working principles and present recent advances which broaden the horizons in novel material research [4] by providing new opportunities to study electromagnetic (EM) mode dispersion, light-matter interaction, and electron-lattice correlation at nanoscale resolutions, which conventional microscopy techniques, such as phase contrast microscopy, differential interference contrast microscopy, and laser scanning confocal microscopy, fail to easily achieve.

[1] T. Taubner, R. Hillenbrand, F. Keilmann, J. Microsc. 2003, 210, 311.

[2] P. Hermann, et.al., Opt. Express 2014, 22, 17948.

[3] M. Wagner, et. al., Nano Lett. 2014, 14, 894.

[4] F. Hu, Y. Luan, et.al., Nat. Photonics 2017, 11, 356.



Welcome coffee will be served in the hall from 10:30 am.



Magali Brunet

Cécile Marcelot

Sebastien Weber