title: Comment on "Optimal detection angle in sub-diffraction resolution photothermal microscopy: application for high sensitivity imaging of biological tissues".
abstract: A recent publication [Opt. Express, 22(16), 18833-18842 (2014)] discusses the optimal detection aperture in photothermal single particle microscopy. This new theory is in contradiction with rigorous ab-initio electrodynamic calculations. Nonetheless, the experimentally verified conclusion that a maximum signal occurs at a finite numerical detection aperture remains valid and is in accord with existing models.
authors.forename: Markus
authors.initials: M
authors.lastname: Selmke
authors.forename: Frank
authors.initials: F
authors.lastname: Cichos