Dr. Nathan J. Withers Profile

Dr. Nathan J. Withers

Post Doctoral Fellow at Univ of New Mexico

SPIE Involvement:

Author

Publications (27)

Proceedings Article | 21 March 2022 Presentation + Paper

Presentation + Paper

Colloidal synthesis and characterization of ytterbium-doped YLF nanocrystals

Shruti Gharde, Arjun Senthil, Mark Reymatias, Aadit Sharma, Ciara Murphy, Nathan Withers, Gennady Smolyakov, Sergei Ivanov, John Watt, Dale Huber, Marek Osiński

Proceedings Volume PC11977, PC119770H (2022) https://doi.org/10.1117/12.2615365

KEYWORDS: Ytterbium, Nanocrystals, Transmission electron microscopy, Fluorine, Absorption, Luminescence, Spectrophotometry, Near infrared, Crystals, Astatine

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Proceedings Article | 4 March 2022 Presentation + Paper

Presentation + Paper

Anti-Stokes photoluminescence from LiY1-xYbxF4 nanocrystals

Arjun Senthil, Shruti Gharde, Mark Reymatias, Ciara Murphy, Alexander Neumann, Nathan Withers, Gennady Smolyakov, Sergei Ivanov, Dale Huber, Marek Osiński

Proceedings Volume 12018, 1201807 (2022) https://doi.org/10.1117/12.2615076

KEYWORDS: Ytterbium, Luminescence, Scanning probe lithography, Optical cooling, Nanocrystals, Absorption, Temperature metrology, Solids, Crystals, Yttrium

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Proceedings Article | 16 March 2020 Paper

Paper

Synthesis and characterization of colloidal CdSexS1-x/ZnS quantum dots

Mark Reymatias, Arjun Senthil, Dominic Bosomtwi, Shruti Gharde, Gema Alas, DeYannah Walker, Adreanna Rael, Nhi Nguyen, Nathan Withers, Sergei Ivanov, John Watt, Dale Huber, Marek Osiński

Proceedings Volume 11255, 1125506 (2020) https://doi.org/10.1117/12.2553001

KEYWORDS: Quantum dots

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Proceedings Article | 16 March 2020 Paper

Paper

Synthesis and characterization of near-infrared PbSe/SnS colloidal core-shell quantum dots

Arjun Senthil, Mark Reymatias, Gema Alas, Shruti Gharde, Rafael Castro, Adreanna Rael, DeYannah Walker, Nathan Withers, Gennady Smolyakov, Sergei Ivanov, Dale Huber, Marek Osiński

Proceedings Volume 11255, 1125508 (2020) https://doi.org/10.1117/12.2555079

KEYWORDS: Tin, Lead, Quantum dots, Sulfur, Absorption, Selenium, Nanocrystals, Near infrared, Chalcogenides, Biomedical optics

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Proceedings Article | 9 March 2020 Open Access

Open Access

Paper

Anti-Stokes photoluminescence and optical cooling of CdSeS/ZnS colloidal quantum dots embedded in dielectric waveguides

Mark Reymatias, Gema Alas, Arjun Senthil, Sami Nazib, Troy Hutchins-Delgado, Hosuk Lee, Shruti Gharde, Dominic Bosomtwi, DeYannah Walker, Adreanna Rael, Nathan Withers, Gennady Smolyakov, Alexander Neumann, Yuliya Kuznetsova, Sergei Ivanov, Dale Huber, Marek Osiński

Proceedings Volume 11298, 112980P (2020) https://doi.org/10.1117/12.2550748

KEYWORDS: Waveguides, Luminescence, Optical cooling, Silicon, Quantum dots, Absorption, Thermometry, Signal detection, Phase shifts, Optical pumping

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Proceedings Article | 18 March 2019 Paper

Paper

Wide-temperature-range characterization of 1.55-µm phosphorus-free multiple-quantum-well lasers grown by MBE on InP

Sami Adnan Nazib, Troy Hutchins-Delgado, Diana Magana Contreras, Hosuk Lee, Estania Jean Charles, Nathan Withers, Sadhvikas Addamane, Emma Renteria, John Nogan, Ganesh Balakrishnan, Marek Osiński

Proceedings Volume 10912, 109120X (2019) https://doi.org/10.1117/12.2515648

KEYWORDS: Cryogenics, Semiconductor lasers, Temperature metrology, Resistance

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Proceedings Article | 7 March 2019 Paper

Paper

Synthesis and characterization of colloidal ZnTe/ZnS quantum dots

Gavin Gonzales, Arjun Senthil, Gema Alas, Nathan Withers, Sergei Ivanov, Dale Huber, Marek Osiński

Proceedings Volume 10892, 1089206 (2019) https://doi.org/10.1117/12.2515646

KEYWORDS: Quantum dots, Transmission electron microscopy, Luminescence, Quantum efficiency, Nanocrystals

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Proceedings Article | 4 March 2019 Paper

Paper

Characterization of MBE-grown 1.55-µm GaSb-based multiple-quantum-well lasers at cryogenic temperatures

Troy Hutchins-Delgado, Sami Adnan Nazib, Hosuk Lee, Diana Magana Contreras, Estania Jean Charles, Nathan Withers, Sadhvikas Addamane, Emma Renteria, John Nogan, Ganesh Balakrishnan, Marek Osiński

Proceedings Volume 10912, 109120I (2019) https://doi.org/10.1117/12.2515649

KEYWORDS: Cryogenics, Temperature metrology, Cladding, Semiconductor lasers, Laser applications, Resistance

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Proceedings Article | 23 February 2018 Paper

Paper

Synthesis and characterization of colloidal ZnTe nanocrystals and ZnTe/ZnSe quantum dots

Gavin Gonzales, Gema Alas, Arjun Senthil, Nathan Withers, Christina Minetos, Alejandro Sandoval, Sergei Ivanov, Gennady Smolyakov, Dale Huber, Marek Osiński

Proceedings Volume 10507, 1050703 (2018) https://doi.org/10.1117/12.2299330

KEYWORDS: Nanocrystals, Zinc, Quantum dots, Transmission electron microscopy, Absorption, Quantum efficiency, Luminescence, Cadmium, Nanoparticles, Chalcogenides

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Proceedings Article | 23 February 2018 Paper

Paper

Effects of iron-oxide nanoparticles on compound biofilms of streptococcus gordonii and fusobacterium nucleatum

Jane Nguyen, Nathan Withers, Gema Alas, Arjun Senthil, Christina Minetos, Nikita Jaiswal, Sergei Ivanov, Dale Huber, Gennady Smolyakov, Marek Osiński

Proceedings Volume 10507, 105070J (2018) https://doi.org/10.1117/12.2299280

KEYWORDS: Nanoparticles, Iron, Oxides, Bacteria, Teeth, Mouth, Inflammation, Metals, Coating, Biomedical optics

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Proceedings Article | 13 March 2013 Paper

Paper

Highly efficient multifunctional MnSe/ZnSeS quantum dots for biomedical applications

Leisha Armijo, Brian Akins, John Plumley, Antonio Rivera, Nathan Withers, Nathaniel Cook, Gennady Smolyakov, Dale Huber, Hugh Smyth, Marek Osiński

Proceedings Volume 8595, 859517 (2013) https://doi.org/10.1117/12.2009563

KEYWORDS: Nanoparticles, Quantum dots, Magnetism, Zinc, Biomedical optics, Manganese, Magnetic resonance imaging, Transmission electron microscopy, Selenium, Particles

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Proceedings Article | 22 February 2013 Paper

Paper

Effects of La0.2Ce0.6Eu0.2F3 nanocrystals capped with polyethylene glycol on human pancreatic cancer cells in vitro

Nathan Withers, Natasha Glazener, Antonio Rivera, Brian Akins, Leisha Armijo, John Plumley, Nathaniel Cook, Jacqueline Sugar, Rana Chan, Yekaterina Brandt, Gennady Smolyakov, Philip Heintz, Marek Osiński

Proceedings Volume 8595, 85951O (2013) https://doi.org/10.1117/12.2009468

KEYWORDS: Nanocrystals, Pancreatic cancer, X-rays, Cerium, Monte Carlo methods, Cancer, Luminescence, Lanthanides, Ions, Europium

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Proceedings Article | 24 October 2012 Paper

Paper

Multifunctional superparamagnetic nanoparticles for enhanced drug transport in cystic fibrosis

Leisha Armijo, Yekaterina Brandt, Antonio Rivera, Nathaniel Cook, John Plumley, Nathan Withers, Michael Kopciuch, Gennady Smolyakov, Dale Huber, Hugh Smyth, Marek Osinski

Proceedings Volume 8548, 85480E (2012) https://doi.org/10.1117/12.943621

KEYWORDS: Nanoparticles, Iron, Magnetism, Oxides, Zinc, Cystic fibrosis, Particles, Transmission electron microscopy, Selenium, Argon

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Proceedings Article | 21 May 2012 Paper

Paper

Thermal neutron detection with PMMA nanocomposites containing dysprosium fluoride nanocrystals

Antonio Rivera, Natasha Glazener, Nathaniel Cook, Salomon Maestas, Brian Akins, Leisha Armijo, John Plumley, Nathan Withers, Kenneth Carpenter, Gennady Smolyakov, Robert Busch, Marek Osiński

Proceedings Volume 8358, 83581S (2012) https://doi.org/10.1117/12.921502

KEYWORDS: Holmium, Dysprosium, Polymethylmethacrylate, Nanocomposites, Polymers, Nanocrystals, Sensors, Transmission electron microscopy, Optical properties, Absorption

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Proceedings Article | 3 March 2012 Paper

Paper

Multifunctional superparamagnetic nanocrystals for imaging and targeted drug delivery to the lung

Leisha Armijo, Yekaterina Brandt, Nathan Withers, John Plumley, Nathaniel Cook, Antonio Rivera, Surabhi Yadav, Gennady Smolyakov, Todd Monson, Dale Huber, Hugh Smyth, Marek Osiński

Proceedings Volume 8232, 82320M (2012) https://doi.org/10.1117/12.913577

KEYWORDS: Nanocrystals, Iron, Magnetism, Oxides, Nanoparticles, Particles, Lung, Temperature metrology, Optical spheres, Ferromagnetics

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Proceedings Article | 2 February 2012 Paper

Paper

Effects of La0.2Ce0.6Eu0.2F3 nanoparticles capped with polyethylene glycol on human astrocytoma cells in vitro

Nathan Withers, Yekaterina Brandt, Antonio Rivera, Leisha Armijo, Nathaniel Cook, Marek Osiński

Proceedings Volume 8232, 82320R (2012) https://doi.org/10.1117/12.911953

KEYWORDS: Nanocrystals, Luminescence, Nanoparticles, Absorption, Lanthanides, Control systems, Cancer, Transmission electron microscopy, Absorbance, Lanthanum

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Proceedings Article | 3 June 2011 Paper

Paper

Detection of thermal neutrons using gadolinium-oxide-based nanocrystals

Antonio Rivera, Natasha Glazener, Nathaniel Cook, Brian Akins, John Plumley, Nathan Withers, Kenneth Carpenter, Gennady Smolyakov, Robert Busch, Marek Osiński

Proceedings Volume 8018, 80180F (2011) https://doi.org/10.1117/12.883646

KEYWORDS: Nanocrystals, Gadolinium, Scintillators, Transmission electron microscopy, Cerium, Absorption, Europium, Sensors, Spectroscopy, Scintillation

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Proceedings Article | 16 February 2011 Paper

Paper

Locally increased mortality of gamma-irradiated cells in presence of lanthanide-halide nanoparticles

Nathan Withers, Natasha Glazener, John Plumley, Brian Akins, Antonio Rivera, Nathaniel Cook, Gennady Smolyakov, Graham Timmins, Marek Osiński

Proceedings Volume 7909, 79090L (2011) https://doi.org/10.1117/12.877029

KEYWORDS: Monte Carlo methods, Tissues, Gold, Magnesium, Tumors, Nanoparticles, Radiotherapy, Photons, Lanthanum, Absorption

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Proceedings Article | 5 May 2010 Paper

Paper

Thermal neutron detectors based on gadolinium-containing lanthanide-halide nanoscintillators

John Plumley, Nathan Withers, Antonio Rivera, Brian Akins, José Vargas, Kenneth Carpenter, Gennady Smolyakov, Robert Busch, Marek Osiński

Proceedings Volume 7665, 76651F (2010) https://doi.org/10.1117/12.854903

KEYWORDS: Gadolinium, Nanocrystals, Sensors, Absorption, Scintillation, Cerium, Scintillators, Transmission electron microscopy, Gamma radiation, Spectroscopy

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Proceedings Article | 27 February 2010 Paper

Paper

Radiation sensitivity enhancement in cells using high-Z nanoparticles

Nathan Withers, John Plumley, Brian Akins, Antonio Rivera, Gloria Medina, Gennady Smolyakov, Graham Timmins, Marek Osinski

Proceedings Volume 7575, 75750Z (2010) https://doi.org/10.1117/12.848944

KEYWORDS: Nanocrystals, Lanthanum, Nanoparticles, Cerium, Gold, Radiotherapy, Tumors, Photons, Tissues, Ions

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Proceedings Article | 12 May 2009 Paper

Paper

Lead-iodide-based nanoscintillators for detection of ionizing radiation

Nathan Withers, Brian Akins, Antonio Rivera, John Plumley, Gennady Smolyakov, Marek Osiński

Proceedings Volume 7304, 73041N (2009) https://doi.org/10.1117/12.819004

KEYWORDS: Lead, Nanocrystals, Transmission electron microscopy, Crystals, Scintillation, Scanning electron microscopy, Quantum efficiency, Absorption, Luminescence, Scintillators

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Proceedings Article | 12 May 2009 Paper

Paper

Lanthanide-halide-based nanoscintillators for portable radiological detectors

Marek Osiński, John Plumley, Nathan Withers, Antonio Rivera, Brian Akins, Krishnaprasad Sankar, Gennady Smolyakov

Proceedings Volume 7306, 730617 (2009) https://doi.org/10.1117/12.819018

KEYWORDS: Lanthanum, Cerium, Scintillation, Transmission electron microscopy, Nanocrystals, Absorption, Crystals, Lanthanides, Fluorine, Scintillators

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Proceedings Article | 3 March 2009 Paper

Paper

Scintillating-nanoparticle-induced enhancement of absorbed radiation dose

Nathan Withers, John Plumley, Nicole Triño, Krishnaprasad Sankar, Brian Akins, Antonio Rivera, Gennady Smolyakov, Graham Timmins, Marek Osinski

Proceedings Volume 7189, 718917 (2009) https://doi.org/10.1117/12.816628

KEYWORDS: Nanocrystals, Lanthanum, Absorption, Cerium, Nanoparticles, Gold, Radiotherapy, Spectroscopy, Tumors, Tissues

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Proceedings Article | 3 March 2009 Paper

Paper

Synthesis and characterization of scintillating cerium-doped lanthanum fluoride nanocrystals

Krishnaprasad Sankar, John Plumley, Brian Akins, Tosifa Memon, Nathan Withers, Gennady Smolyakov, Marek Osinski

Proceedings Volume 7189, 718909 (2009) https://doi.org/10.1117/12.816894

KEYWORDS: Cerium, Lanthanum, Nanocrystals, Scintillation, Absorption, Crystals, Ions, Transmission electron microscopy, Spectroscopy, UV-Vis spectroscopy

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Proceedings Article | 13 March 2008 Paper

Paper

Synthesis and characterization of scintillating lead-iodide-based nanocrystals

Krishnaprasad Sankar, Brian Akins, Tosifa Memon, Nathan Withers, Gennady Smolyakov, Marek Osiński

Proceedings Volume 6866, 686604 (2008) https://doi.org/10.1117/12.784060

KEYWORDS: Scintillation, Quantum efficiency, Luminescence, Crystals, Nanocrystals, Scintillators, Lead, Positron emission tomography, Transmission electron microscopy, Scanning electron microscopy

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Proceedings Article | 29 February 2008 Paper

Paper

Highly unidirectional Y-junction S-section ring lasers

Nathan Withers, Omar Qassim, Gennady Smolyakov, Marek Osiński

Proceedings Volume 6889, 688916 (2008) https://doi.org/10.1117/12.784186

KEYWORDS: Semiconductor lasers, Waveguides, Semiconductors, Photonic integrated circuits, Photodetectors, Continuous wave operation, Laser development, Switching, Laser resonators

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Proceedings Article | 22 March 2007 Paper

Paper

Small footprint InGaSb/AlGaAsSb multiple-quantum-well light-emitting diodes

Nathan Withers, Gennady Smolyakov, Hongjun Cao, Ron Kaspi, Marek Osiński

Proceedings Volume 6468, 646802 (2007) https://doi.org/10.1117/12.717247

KEYWORDS: Light emitting diodes, Diodes, Lead, Mid-IR, Infrared imaging, Infrared radiation, Gallium antimonide, Electrodes, Infrared sensors, Manufacturing

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Showing 5 of 27 publications

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