Prof. Vasily N. Astratov Profile

Prof. Vasily N. Astratov

Professor at Univ of North Carolina at Charlotte

SPIE Involvement:

Conference Program Committee | Editor | Author

Publications (25)

Proceedings Article | 24 May 2022 Presentation + Paper

Ball lens-assisted smartphone microscopy with diffraction-limited resolution

Vasily Astratov, Boya Jin, Anton Erykalin, Alexey Maslov

Proceedings Volume 12152, 1215206 (2022) https://doi.org/10.1117/12.2624450

KEYWORDS: Microscopy, Lenses, Optical spheres, Image resolution, Melanoma, Biomedical optics, Refractive index, Contact lenses, Objectives, Monochromatic aberrations

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Proceedings Article | 5 March 2022 Presentation + Paper

Monolithic integration of photodetector focal plane arrays with micropyramidal arrays in mid-wave infrared

Grant Bidney, Boya Jin, Lou Deguzman, Joshua Duran, Gamini Ariyawansa, Igor Anisimov, Nicholaos Limberopoulos, Augustine Urbas, Kenneth Allen, Sarath Gunapala, Vasily Astratov

Proceedings Volume 12006, 1200609 (2022) https://doi.org/10.1117/12.2610304

KEYWORDS: Photodetectors, Silicon, Mid-IR, Sensors, Nickel, Semiconducting wafers, Photons, Short wave infrared radiation, Quantum efficiency

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Proceedings Article | 5 March 2022 Poster + Paper

Fabrication of 3-D light concentrating microphotonic structures by anisotropic wet etching of silicon

Grant Bidney, Boya Jin, Lou Deguzman, Thomas Hutchens, Joshua Duran, Gamini Ariyawansa, Igor Anisimov, Nicholaos Limberopoulos, Augustine Urbas, Kenneth Allen, Sarath Gunapala, Vasily Astratov

Proceedings Volume 12012, 120120B (2022) https://doi.org/10.1117/12.2610426

KEYWORDS: Silicon, Wet etching, Solar concentrators, Photoresist materials, Mid-IR, Semiconducting wafers, Photomasks, Photodetectors, Short wave infrared radiation, Sensors

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Proceedings Article | 5 March 2022 Poster + Paper

Light-harvesting microconical arrays integrated with photodetector FPAs for enhancing infrared imaging devices

Boya Jin, Aaron Brettin, Grant Bidney, Nicholaos Limberopoulos, Joshua Duran, Gamini Ariyawansa, Igor Anisimov, Augustine Urbas, Kenneth Allen, Sarath Gunapala, Vasily Astratov

Proceedings Volume 12004, 120040X (2022) https://doi.org/10.1117/12.2609883

KEYWORDS: Photodetectors, Staring arrays, Mid-IR, Infrared imaging, Waveguides, Solar concentrators, Photoresist materials, Short wave infrared radiation, Imaging devices, Microlens array

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Proceedings Article | 2 March 2022 Presentation + Paper

Label-free cellphone microscopy with submicron resolution through high-index contact ball lens for in vivo melanoma diagnostics and other applications

Boya Jin, Grant Bidney, Igor Anisimov, Nicholaos Limberopoulos, Kenneth Allen, Alexey Maslov, Vasily Astratov

Proceedings Volume 11972, 119720F (2022) https://doi.org/10.1117/12.2609911

KEYWORDS: Microscopes, Image resolution, Microscopy, Melanoma, Imaging systems, Cameras, In vivo imaging, Diagnostics, Skin, Glasses

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Proceedings Article | 4 March 2019 Presentation

Plasmonics sheds light on superresolution imaging by dielectric microspheres (Conference Presentation)

Vasily Astratov

Proceedings Volume 10891, 108910U (2019) https://doi.org/10.1117/12.2511276

KEYWORDS: Plasmonics, Super resolution, Dielectrics, Nanoplasmonics, Image resolution, Proteins, Spectral resolution, Gold, Aluminum, Solids

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Proceedings Article | 23 February 2017 Presentation + Paper

Contact microspherical nanoscopy: from fundamentals to biomedical applications

V. Astratov, A. Maslov, A. Brettin, K. Blanchette, Y. Nesmelov, N. Limberopoulos, D. Walker, A. Urbas

Proceedings Volume 10077, 100770S (2017) https://doi.org/10.1117/12.2251869

KEYWORDS: Super resolution microscopy, Biomedical optics, Super resolution, Proteins, Image resolution, Near field optics, Near field, Plasmonics, Nanoplasmonics, Lenses

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Proceedings Article | 20 February 2017 Presentation + Paper

Use of photonic jets produced by dielectric microspheres for increasing sensitivity and angle-of-view of MWIR detectors

Farzaneh Abolmaali, Aaron Brettin, Nicholaos Limberopoulos, Augustine Urbas, Vasily Astratov

Proceedings Volume 10107, 101070V (2017) https://doi.org/10.1117/12.2249729

KEYWORDS: Mid-IR, Sensors, Staring arrays, Optical spheres, Dielectrics, Microlens array, Back illuminated sensors, Photoresist materials, Finite-difference time-domain method, Microlens

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Proceedings Article | 16 February 2017 Paper

Resonant routing of optical pulses in coupled-cavity structures

Farzaneh Abolmaali, Nicholaos Limberopoulos, Augustine Urbas, Alexey Maslov, Vasily Astratov

Proceedings Volume 10106, 101061J (2017) https://doi.org/10.1117/12.2249591

KEYWORDS: Waveguides, Microresonators, Structural design, Molecular photonics, Finite-difference time-domain method, Photonic crystals, Photonic microstructures, Molecules, Optical isolators, Femtosecond phenomena, Resonators, Optical microcavities, Signal detection, Wave propagation, Switching, Mirrors

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Proceedings Article | 22 April 2016 Presentation + Paper

Fundamental limits of super-resolution microscopy by dielectric microspheres and microfibers

V. Astratov, A. Maslov, K. Allen, N. Farahi, Y. Li, A. Brettin, N. Limberopoulos, D. Walker, A. Urbas, V. Liberman, M. Rothschild

Proceedings Volume 9721, 97210K (2016) https://doi.org/10.1117/12.2212762

KEYWORDS: Super resolution, Nanoplasmonics, Super resolution microscopy, Microscopy, Image resolution, Imaging arrays, Dielectrics, Near field, Confocal microscopy, Near field optics, Contact lenses, Optical spheres, Photonic nanostructures, Specialty optical fibers, Diffraction, Gold, Neodymium

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Proceedings Article | 4 March 2014 Paper

Spectral control and temporal properties of resonant optical propulsion of dielectric microspheres in evanescent fiber couplers

Yangcheng Li, Alexey Maslov, Vasily Astratov

Proceedings Volume 8960, 89600C (2014) https://doi.org/10.1117/12.2043097

KEYWORDS: Optical spheres, Optical tweezers, Fiber couplers, Tunable lasers, Chemical species, Laser development, Dielectrics, Water, Fiber lasers, Fiber coupled lasers

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SPIE Journal Paper | 20 January 2014 Open Access

Detachable microsphere scalpel tips for potential use in ophthalmic surgery with the erbium:YAG laser

Thomas Hutchens, Arash Darafsheh, Amir Fardad, Andrew Antoszyk, Howard Ying, Vasily Astratov, Nathaniel Fried

JBO, Vol. 19, Issue 01, 018003, (January 2014) https://doi.org/10.1117/12.10.1117/1.JBO.19.1.018003

KEYWORDS: Optical spheres, Surgery, Tissues, Optical fibers, Laser therapeutics, Laser ablation, Laser vision correction, Mid-IR, Laser tissue interaction, Laser cutting

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Proceedings Article | 26 March 2013 Paper

Contact focusing multimodal probes for potential use in ophthalmic surgery with the Erbium:YAG laser

Arash Darafsheh, Thomas Hutchens, Amir Fardad, Andrew Antoszyk, Howard Ying, Nathaniel Fried, Vasily Astratov

Proceedings Volume 8567, 856729 (2013) https://doi.org/10.1117/12.2005331

KEYWORDS: Optical spheres, Surgery, Tissues, Laser ablation, Optical fibers, Cornea, Laser therapeutics, Laser tissue interaction, Retina, Mid-IR

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Proceedings Article | 6 March 2013 Paper

Filtering of radially polarized beams by microsphere-chain waveguides

Arash Darafsheh, Nicholaos Limberopoulos, Anatole Lupu, Vasily Astratov

Proceedings Volume 8627, 86270D (2013) https://doi.org/10.1117/12.2005445

KEYWORDS: Optical spheres, Dielectric polarization, Polarization, Waveguides, Sensors, Signal attenuation, Geometrical optics, Dielectrics, Refraction, Numerical modeling

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Proceedings Article | 19 February 2013 Paper

Optical microscopy with super-resolution by liquid-immersed high-index microspheres

Arash Darafsheh, Nicholaos Limberopoulos, John Derov, Dennis Walker, Magdalena Durska, Dimitry Krizhanovskii, David Whittaker, Vasily Astratov

Proceedings Volume 8594, 85940C (2013) https://doi.org/10.1117/12.2005896

KEYWORDS: Optical spheres, Super resolution, Microscopy, Liquids, Microscopes, Objectives, Near field optics, Refractive index, Glasses, Silver

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SPIE Journal Paper | 11 June 2012 Open Access

Characterization of novel microsphere chain fiber optic tips for potential use in ophthalmic laser surgery

Thomas Hutchens, Arash Darafsheh, Amir Fardad, Andrew Antoszyk, Howard Ying, Vasily Astratov, Nathaniel Fried

JBO, Vol. 17, Issue 06, 068004, (June 2012) https://doi.org/10.1117/12.10.1117/1.JBO.17.6.068004

KEYWORDS: Optical spheres, Tissues, Laser tissue interaction, Laser ablation, Er:YAG lasers, Fiber optics, Surgery, Laser therapeutics, Tissue optics, Cornea

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Proceedings Article | 7 February 2012 Paper

Beam tapering effect in microsphere chains: from geometrical to physical optics

Kenneth Allen, Arash Darafsheh, Vasily Astratov

Proceedings Volume 8236, 823622 (2012) https://doi.org/10.1117/12.909467

KEYWORDS: Optical spheres, Geometrical optics, Signal attenuation, Light scattering, Light, Biomedical optics, Visualization, Photonic nanostructures, Beam propagation method, Microscopes

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Proceedings Article | 7 February 2012 Paper

Evanescent light coupling and optical propelling of microspheres in water immersed fiber couplers

Yangcheng Li, Oleksiy Svitelskiy, David Carnegie, Edik Rafailov, Vasily Astratov

Proceedings Volume 8236, 82361P (2012) https://doi.org/10.1117/12.908405

KEYWORDS: Optical spheres, Water, Fiber couplers, Scattering, Waveguides, Geometrical optics, Particles, Light scattering, Refractive index, Optical tweezers

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Proceedings Article | 2 February 2012 Paper

Photonic nanojet-induced modes: fundamentals and applications

Arash Darafsheh, Anatole Lupu, S. Burand, Thomas Hutchens, Nathaniel Fried, Vasily Astratov

Proceedings Volume 8264, 82640X (2012) https://doi.org/10.1117/12.909716

KEYWORDS: Optical spheres, Geometrical optics, Photonic nanostructures, Ruby, Laser therapeutics, Signal attenuation, Optical fibers, Ray tracing, Radio propagation, Sensors

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Proceedings Article | 30 January 2012 Paper

Novel microsphere chain fiber tips for use in mid-infrared ophthalmic laser surgery

Thomas Hutchens, Arash Darafsheh, Amir Fardad, Andrew Antoszyk, Howard Ying, Vasily Astratov, Nathaniel Fried

Proceedings Volume 8218, 821803 (2012) https://doi.org/10.1117/12.905614

KEYWORDS: Optical spheres, Tissues, Laser ablation, Mid-IR, Er:YAG lasers, Retina, Fiber lasers, Cornea, Surgery, Sapphire

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Proceedings Article | 22 February 2011 Paper

Characterization of high index microsphere resonators in fiber-integrated microfluidic platforms

Oleksiy Svitelskiy, Dongning Sun, Arash Darafsheh, Mikhail Sumetsky, Anatoly Lupu, Maria Tchernycheva, Vasily Astratov

Proceedings Volume 7913, 791314 (2011) https://doi.org/10.1117/12.876126

KEYWORDS: Optical spheres, Optical fibers, Water, Refractive index, Microfluidics, Resonators, Liquids, Glasses, Sensors, Barium

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Proceedings Article | 19 February 2011 Paper

Focusing capability of integrated chains of microspheres in the limit of geometrical optics

Arash Darafsheh, Kenneth Allen, Amir Fardad, Nathaniel Fried, Andrew Antoszyk, Howard Ying, Vasily Astratov

Proceedings Volume 7913, 79131A (2011) https://doi.org/10.1117/12.876139

KEYWORDS: Optical spheres, Geometrical optics, Optical fibers, Sapphire, Mid-IR, Biomedical optics, Tissue optics, Eye, Hollow waveguides, Laser vision correction

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Proceedings Article | 16 February 2010 Paper

Integrated microsphere arrays: light focusing and propagation effects

Arash Darafsheh, Matthew Kerr, Kenneth Allen, Nathaniel Fried, Andrew Antoszyk, Howard Ying, Vasily Astratov

Proceedings Volume 7605, 76050R (2010) https://doi.org/10.1117/12.845791

KEYWORDS: Optical spheres, Signal attenuation, Refraction, Spherical lenses, Optical fibers, Tissue optics, Ray tracing, Photonics, Hollow waveguides, Near field optics

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Proceedings Article | 19 February 2009 Paper

Spectroscopy of photonic molecular states in supermonodispersive bispheres

Seungmoo Yang, Vasily Astratov

Proceedings Volume 7194, 719411 (2009) https://doi.org/10.1117/12.821753

KEYWORDS: Optical spheres, Spectroscopy, Molecular photonics, Molecular spectroscopy, Resonators, Microrings, Molecules, Spherical lenses, Fabrication, Glasses

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Proceedings Article | 14 February 2007 Paper

Nanojet-induced modes in 1D chains of microspheres

A. Kapitonov, V. Astratov

Proceedings Volume 6452, 645205 (2007) https://doi.org/10.1117/12.714486

KEYWORDS: Optical spheres, Signal attenuation, Spherical lenses, Optical microcavities, Light, Photonic nanostructures, Light scattering, Luminescence, Light sources, Solids

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