Dr. Aleksandar J. Krmpot Profile

Dr. Aleksandar J. Krmpot

Research Professor at Univ of Belgrade

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Author

Area of Expertise:

laser spectroscopy , coherent optical effects , quantum optics , nonlinear microscopy

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Publications (11)

Proceedings Article | 13 March 2019 Presentation

Mapping mechanical properties and structure of dentin by Brillouin spectroscopy and nonlinear optical microscopy (Conference Presentation)

Tijana Lainović, Jérémie Margueritat, Larisa Blažić, Dejan Pantelić, Mihailo Rabasović, Aleksandar Krmpot, Thomas Dehoux

Proceedings Volume 10880, 1088018 (2019) https://doi.org/10.1117/12.2506858

KEYWORDS: Microscopy, Spectroscopy, Laser dentistry, Ultrasonics, Dentistry, Interfaces, Optical spectroscopy, Optical microscopy, Medicine, Physics

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Mechanical and optical properties are the main criteria for assessing the health of dental tissue in contemporary dentistry. Dentinal pathological changes can be detected by visuo-tactile and radiographic methods to guide clinicians in establishing a relevant diagnosis and an adapted therapy. However, such approaches cannot give information on the dentinal microstructure. Recently, laser ultrasonic techniques have been deployed to evaluate the mechanical properties of enamel [1,2] However, such techniques lack the resolution to reveal the transitions differences between tissue layers. In this work, we used Brillouin light scattering spectroscopy as a non-contact alternative to probe mechanical changes in dentin and dentin-resin interface at GHz hypersonic frequencies. We obtained maps of the Brillouin frequency shift and linewidth that can be interpreted as maps of sound velocity and viscosity. In addition, we observed the specimens by a homemade nonlinear microscopy setup [3]. A 730 nm wavelength Titanium-sapphire laser was used as an excitation source for two-photon excitation fluorescence microscopy (TPEF), while 1040 nm wavelengthYb:KGW laser was used for second harmonic generation (SHG). Our results show significant changes between healthy tissues and pathological lesions. Such results can help to precisely delineate destructed dentin during clinical procedures, paving the way to minimally invasive strategies. In addition, our simultaneous analysis of Brillouin maps and nonlinear images brings valuable information on structure-related mechanical properties of dentin and dentin-resin adhesive interface. 1. Wang et al, Experimental and numerical studies for nondestructive evaluation of human enamel using laser ultrasonic technique. Appl Opt 52, 6896-6905 (2013). 2. Wang et al., Laser ultrasonic evaluation of human dental enamel during remineralisation treatment. Biomed Opt Express 2, 345-355 (2011). 3. Rabasović M et al. Nonlinear microscopy of chitin and chitinous structures: a case study of two cave-dwelling insects. J Biomed Opt 20, 016010 (2015)

SPIE Journal Paper | 9 February 2017 Open Access

Mapping of hemoglobin in erythrocytes and erythrocyte ghosts using two photon excitation fluorescence microscopy

Katarina Bukara, Svetlana Jovanić, Ivana Drvenica, Ana Stančić, Vesna Ilić, Mihailo Rabasović, Dejan Pantelić, Branislav Jelenković, Branko Bugarski, Aleksandar Krmpot

JBO, Vol. 22, Issue 02, 026003, (February 2017) https://doi.org/10.1117/12.10.1117/1.JBO.22.2.026003

KEYWORDS: Microscopy, Luminescence, Two photon excitation microscopy, Blood, Mirrors, Imaging systems, Visualization, Cameras, Photonic microstructures, Signal processing

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Proceedings Article | 14 July 2015 Paper

Quantitative confocal fluorescence microscopy of dynamic processes by multifocal fluorescence correlation spectroscopy

Aleksandar Krmpot, Stanko Nikolić, Marco Vitali, Dimitrios Papadopoulos, Sho Oasa, Per Thyberg, Simone Tisa, Masataka Kinjo, Lennart Nilsson, Walter Gehring, Lars Terenius, Rudolf Rigler, Vladana Vukojevic

Proceedings Volume 9536, 95360O (2015) https://doi.org/10.1117/12.2183935

KEYWORDS: Fluorescence correlation spectroscopy, Diffusion, Luminescence, Quantum dots, Confocal microscopy, Diffractive optical elements, Molecules, Cameras, Microscopy, Receptors

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SPIE Journal Paper | 9 January 2015 Open Access

Nonlinear microscopy of chitin and chitinous structures: a case study of two cave-dwelling insects

Mihailo Rabasović, Dejan Pantelić, Branislav Jelenković, Srećko Ćurčić, Maja Rabasović, Maja Vrbica, Vladimir Lazović, Božidar P. Ćurčić, Aleksandar Krmpot

JBO, Vol. 20, Issue 01, 016010, (January 2015) https://doi.org/10.1117/12.10.1117/1.JBO.20.1.016010

KEYWORDS: Second-harmonic generation, Microscopy, Luminescence, Polarization, Signal detection, Confocal microscopy, Antennas, Tissues, 3D image processing, Electronic filtering

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Proceedings Article | 8 January 2015 Paper

Parametric non-degenerate four wave mixing in hot potassium vapor

Bojan Zlatković, Aleksandar Krmpot, Nikola Šibalić, Milan Radonjić, Branislav Jelenković

Proceedings Volume 9447, 944706 (2015) https://doi.org/10.1117/12.2177885

KEYWORDS: Potassium, Laser beam diagnostics, Beam splitters, Four wave mixing, Bragg cells, Chemical species, Doppler effect, Modulators, Absorption, Physics

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Proceedings Article | 18 January 2011 Paper

Dark Hanle resonance narrowing by blocking the central part of the Gaussian laser beam

A. Krmpot, S. Nikoilić, S. Ćuk, M. Radonjić, B. Jelenković

Proceedings Volume 7747, 77470E (2011) https://doi.org/10.1117/12.882831

KEYWORDS: Chemical species, Opacity, Sensors, Rubidium, Gaussian beams, Signal detection, Magnetism, Photodiodes, Doppler effect, Transparency

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Proceedings Article | 5 March 2007 Paper

Coherent population trapping resonances on the D1 line of rubidium

T. Karaulanov, A. Yanev, S. Cartaleva, D. Slavov, N. Petrov, M. Mijailovic, Z. Grujic, A. Krmpot

Proceedings Volume 6604, 66040C (2007) https://doi.org/10.1117/12.726881

KEYWORDS: Magnetism, Rubidium, Luminescence, Modulation, Polarization, Magnesium, Chemical species, Signal detection, Physics, Absorption

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Proceedings Article | 5 March 2007 Paper

Non-linear magneto-optical polarization rotation in dark and bright coherent states

Z. Grujić, M. Mijailović, A. Krmpot, B. Panić, D. Pantelić, B. Jelenković

Proceedings Volume 6604, 66040E (2007) https://doi.org/10.1117/12.726884

KEYWORDS: Polarization, Magnetism, Rubidium, Iron, Absorption, Refractive index, Cesium, Zeeman effect, Chemical species, Dispersion

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Proceedings Article | 5 March 2007 Paper

Koester's interferometer modification for gauge blocks calibration

Marko Nikolić, Aleksandar Krmpot, Bratimir Panić, Zoran Grujić, Dejan Pantelić

Proceedings Volume 6604, 66040P (2007) https://doi.org/10.1117/12.726899

KEYWORDS: Interferometers, Optical fibers, Cameras, Fabry–Perot interferometers, Calibration, Image processing, Speckle, Lamps, Light sources, Physics

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Proceedings Article | 22 April 2005 Paper

Using coherence properties for frequency stabilizing He-Ne laser

Dejan Pantelic, Bratimir Panic, A. Kovacevic, Aleksandar Krmpot

Proceedings Volume 5830, (2005) https://doi.org/10.1117/12.618818

KEYWORDS: Laser stabilization, Visibility, Helium neon lasers, Magnetism, Resonators, Polarization, Interferometers, Ferroelectric materials, Michelson interferometers, Interferometry

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Proceedings Article | 22 April 2005 Paper

Sub-Doppler absorption narrowing in V, A and N-type atom at intense laser fields

Aleksandar Krmpot, M. Lekic, Bratimir Panic, D. Lukic, A. Kovacevic, Dejan Pantelic, B. Jelenkovic

Proceedings Volume 5830, (2005) https://doi.org/10.1117/12.617878

KEYWORDS: Absorption, Chemical species, Laser beam diagnostics, Rubidium, Magnetism, Doppler effect, Chlorine, Transparency, Physics, Raman spectroscopy

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Showing 5 of 11 publications

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