Dispersion-enhanced third-harmonic microscopy

OPTICS COMMUNICATIONS

卷:393

Article

Stock, Christian¹  Zlatanov, Kaloyan¹  Halfmann, Thomas¹ 

[1] Tech Univ Darmstadt, Inst Angew Phys, Hsch Str 6, D-64289 Darmstadt, Germany

关键词: Nonlinear microscopy;    Third harmonic generation;    Ultrafast nonlinear optics;    Dispersion;   

DOI  :  10.1016/j.optcom.2017.02.059

来源: Elsevier

【 摘 要 】

We demonstrate strong enhancements of signal yield and image contrast in third-harmonic microscopy by appropriate choice of driving laser wavelength to modulate the phase-matching conditions of the conversion process by dispersion control. Tuning the laser wavelength in the range of 1010 - 1350 nm at samples containing interfaces with water and glass, we obtained large signal enhancements up to a factor of 19, and improvements in the image contrast by an order of magnitude. The effect is most pronounced at interfaces with media of small and/or not too different nonlinear optical susceptibilities, e.g., as it is the case in typical samples in harmonic microscopy. Beyond the demonstration of this new variant of third-harmonic microscopy, our findings are also of relevance to a proper choice of laser systems for harmonic microscopy setups.

【 授权许可】

Free