Alexander A. Govyadinov

TL;DR: Fourier transform infrared nanospectroscopy (nano-FTIR) based on a scattering-type scanning near-field optical microscope equipped with a coherent-continuum infrared light source can straightforwardly determine the infrared absorption spectrum of organic samples with a spatial resolution of 20 nm.

TL;DR: Mapping of protein structure with 30 nm lateral resolution and sensitivity to individual protein complexes by Fourier transform infrared nanospectroscopy (nano-FTIR) reveals the surprisingly high level of protein organization in the fibril’s periphery, which might explain why fibrils associate.

TL;DR: This work quantitatively measures local dielectric constants and infrared absorption of samples with 2 orders of magnitude improved spatial resolution compared to far-field measurements and obtains local infrared absorption spectra with unprecedented accuracy in peak position and shape, which is the key to quantitative chemometrics on the nanometer scale.

TL;DR: A classical response theory is developed that describes the interaction of fast electrons with (anisotropic) van der Waals slabs, revealing that the electron energy loss is dominated by excitation of hyperbolic phonon polaritons, and not of bulk phonons as often reported.

TL;DR: In this article, the authors present waveguides with photonic crystal cores, supporting energy propagation in subwavelength regions with a mode structure similar to that in telecom fibers, and demonstrate efficient energy transfer to and from regions smaller than 1/25th of the wavelength.