@article{3e397f86a8ed4adb82e34483d9449759,
title = "Pure sinusoidal photo-modulation using an acousto-optic modulator",
abstract = "We use an arbitrary waveform generator to generate a clean sinusoidal modulation from the otherwise nonlinear acousto-optic modulator (AOM). A closed loop optimization script is applied to reduce high order harmonic distortion to less than 0.05% in a high AOM diffraction efficiency regime. This low level of distortion allows us to measure the nonlinear response to photoexcitation of many materials. We demonstrate this technique in a pump-probe experiment to measure the Nonlinear Photo-Modulated Reflectivity (NPMR) of surfaces. NPMR served us as the basis for developing super-resolution microscopy for non-fluorescence samples (label-free) as well as a tool in studying the ultrafast nonlinear response of photo-excited plasmonic nano-structures. Our methodology could be applied to other imaging systems in which measuring nonlinearity is desirable, such as fluorescence and photoacoustic microscopy.",
author = "O. Tzang and D. Hershkovitz and A. Nagler and O. Cheshnovsky",
note = "Publisher Copyright: {\textcopyright} 2018 Author(s).",
year = "2018",
month = dec,
day = "1",
doi = "10.1063/1.5020796",
language = "אנגלית",
volume = "89",
journal = "Review of Scientific Instruments",
issn = "0034-6748",
publisher = "American Institute of Physics",
number = "12",
}