Prof. Hans D. Hallen Profile

Prof. Hans D. Hallen

Professor at North Carolina State Univ

SPIE Involvement:

Conference Program Committee | Author

Publications (35)

Proceedings Article | 4 October 2024 Presentation

Resonance Raman for molecular-specific studies in a complex material

Hans Hallen

Proceedings Volume PC13115, PC131150F (2024) https://doi.org/10.1117/12.3028245

KEYWORDS: Raman spectroscopy, Vibration, Spectroscopy, Resonance enhancement, Tissues, Molecules, Iron, Infrared spectroscopy, Infrared signatures, Infrared radiation

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Proceedings Article | 3 October 2024 Presentation

Custom deep learning enables ultrafast pulse reconstruction using Fourier transformed collinear frequency resolved optical gating

Hans Hallen, Josh Noble, Chen Zhou, Bill Murray, Zhiwen Liu

Proceedings Volume 13139, 131390U (2024) https://doi.org/10.1117/12.3028511

KEYWORDS: Ultrafast phenomena, Deep learning, Laser frequency, Education and training, Data acquisition, Physics, Optical interferometry, Modeling, Laser interferometry, Fourier transforms

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Proceedings Article | 3 October 2024 Presentation

Nonlocal PL dynamics near a monolayer/bilayer transition in WS2

Landon Hernandez, Jinkai Yang, Da Zhou, Mauricio Terrones, Zhiwen Liu, Hans Hallen

Proceedings Volume 13139, 131390L (2024) https://doi.org/10.1117/12.3028259

KEYWORDS: Excitons, Raman spectroscopy, Quantitative analysis, Monolayers, Microscopy, Fluorescence, Atomic force microscopy, 2D materials

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Proceedings Article | 13 March 2024 Presentation

Superfluorescence in microrods and microfibers

Shuang Fang Lim, Rene Ganoe, Robert Riehn, Gang Han, Hans Hallen

Proceedings Volume PC12902, PC129020D (2024) https://doi.org/10.1117/12.3010539

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Proceedings Article | 13 March 2024 Presentation

Room temperature single nanocrystal anti-Stokes shifted superfluorescence for bioimaging

Shuang Fang Lim, Kory Green, Hans Hallen, Kai Huang, Gang Han

Proceedings Volume PC12862, PC128620B (2024) https://doi.org/10.1117/12.3006276

KEYWORDS: Nanocrystals, Upconversion, Quantum emitters, Nanoparticles, Luminescence, Biomedical optics, Ultrafast phenomena, Tissues, Spontaneous emission, Quantum sensing

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Proceedings Article | 3 October 2022 Presentation

Nonlocal exciton dynamics in monolayer WS_2

Hans Hallen, Landon Hernandez, Da Zhou, Mauricio Terrones, Zhiwen Liu

Proceedings Volume PC12228, PC1222803 (2022) https://doi.org/10.1117/12.2635671

KEYWORDS: Excitons, Spectroscopy, Quantitative analysis, Prisms, Charge-coupled devices

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Proceedings Article | 3 October 2022 Paper

Room temperature single nanocrystal anti-stokes shifted superfluorescence

Kory Green, Kai Huang, Gang Han, Hans Hallen, Shuang Fang Lim

Proceedings Volume 12228, 1222802 (2022) https://doi.org/10.1117/12.2634447

KEYWORDS: Neodymium, Nanocrystals, Upconversion, Luminescence, Ions, Doping, Optical computing, Erbium, Photonics, Near infrared

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Proceedings Article | 1 August 2021 Presentation + Paper

Unidirectional optical mechano-sensing with upconversion nanoparticles

Kory Green, Brandon Long, Kai Huang, Gang Han, Hans Hallen, Shuang Fang Lim

Proceedings Volume 11825, 118250V (2021) https://doi.org/10.1117/12.2597041

KEYWORDS: Upconversion, Nanoparticles, Ytterbium, Nanocrystals, Erbium, Crystals, Biosensing, Haptic technology, Fiber optics, Fiber couplers

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Proceedings Article | 1 August 2021 Presentation

Fluorescence nonlocality in two-dimensional Materials

Hans Hallen, Landon Hernandez, William Murray, Zhiwen Liu

Proceedings Volume 11825, 118250W (2021) https://doi.org/10.1117/12.2595933

KEYWORDS: Luminescence, Near field scanning optical microscopy, Transition metals, Signal generators, Signal detection, Second-harmonic generation, Near field, Mode locking, Harmonic generation, Femtosecond phenomena

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Proceedings Article | 19 May 2020 Presentation + Paper

Raman lidar measurements for boundary layer gradients and atmospheric refraction of millimeter-wave signals

Hans Hallen, C. Russell Philbrick

Proceedings Volume 11410, 1141006 (2020) https://doi.org/10.1117/12.2557158

KEYWORDS: Water, Refraction, Ray tracing, LIDAR, Earth's atmosphere, Atmospheric propagation, Radar, Raman spectroscopy, Radio propagation, Atmospheric modeling

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Proceedings Article | 9 September 2019 Presentation + Paper

Large available volume particles for enhanced deep UV local Raman sensing

Shuang Fang Lim, Janina Wirth, Angel Fernandez Bravo, Peter James Schuck, Hans Hallen

Proceedings Volume 11086, 110860Z (2019) https://doi.org/10.1117/12.2529434

KEYWORDS: Particles, Raman spectroscopy, Silica, Nanostructures, Molecules, Gold, Luminescence, Aluminum, Deep ultraviolet, Metals

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Proceedings Article | 9 September 2019 Presentation + Paper

Resonance Raman techniques for complex biological systems

Hans Hallen, Brandon J. Long

Proceedings Volume 11122, 111220N (2019) https://doi.org/10.1117/12.2529642

KEYWORDS: Raman spectroscopy, Molecules, Resonance enhancement, Absorption, Blood, Bone, Iron, Blood vessels, Luminescence, Complex systems

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Proceedings Article | 7 September 2018 Presentation + Paper

DNA methylation detection using UV nano bowtie antenna enhanced Raman spectroscopy

Ling Li, Shuang Fang Lim, Alexander Puretzky, Brandon J. Long, Robert Riehn, Hans Hallen

Proceedings Volume 10727, 107270B (2018) https://doi.org/10.1117/12.2321283

KEYWORDS: Raman spectroscopy, Absorption, Molecules, Antennas, Plasmons, Ultraviolet radiation, Plasmonics, Deep ultraviolet, Ultraviolet detectors, Crystals

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Proceedings Article | 3 September 2018 Presentation + Paper

Resonance Raman imagery of semi-fossilized soft tissues

Brandon Long, Wenxia Zheng, Mary Schweitzer, Hans Hallen

Proceedings Volume 10753, 1075310 (2018) https://doi.org/10.1117/12.2321298

KEYWORDS: Raman spectroscopy, Molecules, Absorption, Tissues, Bone, Blood, Blood vessels, Luminescence, Deep ultraviolet, Tunable lasers

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Proceedings Article | 10 May 2018 Presentation + Paper

Lidar detection of small aerosol size distribution

Hans Hallen, C. Russell Philbrick

Proceedings Volume 10636, 106360J (2018) https://doi.org/10.1117/12.2304890

KEYWORDS: Aerosols, Particles, LIDAR, Atmospheric particles, Scattering, Backscatter, Raman spectroscopy, Mie scattering, Atmospheric modeling, Raman scattering

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Proceedings Article | 5 May 2017 Presentation + Paper

Signatures of dynamical processes in Raman lidar profiles of the atmosphere

C. Russell Philbrick, Hans Hallen

Proceedings Volume 10191, 101910E (2017) https://doi.org/10.1117/12.2262583

KEYWORDS: Raman spectroscopy, LIDAR, Turbulence, Convection, Atmospheric optics, Atmospheric propagation, Oceanography, Interfaces, Troposphere, Ocean optics, Water, Aerosols, Sensors, Temperature metrology, Wind measurement

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Proceedings Article | 13 May 2016 Paper

Atmospheric absorption versus deep ultraviolet (pre-)resonance in Raman lidar measurements

Hans Hallen, Adam Willitsford, Ryan Neely, C. Todd Chadwick, C. Russell Philbrick

Proceedings Volume 9832, 983210 (2016) https://doi.org/10.1117/12.2224149

KEYWORDS: Absorption, Raman spectroscopy, LIDAR, Deep ultraviolet, Liquids, Optical parametric oscillators, Resonance enhancement, Ozone, Molecules, Clouds

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Proceedings Article | 1 September 2015 Paper

Lidar investigations of atmospheric dynamics

C. Russell Philbrick, Hans Hallen

Proceedings Volume 9612, 96120C (2015) https://doi.org/10.1117/12.2188641

KEYWORDS: LIDAR, Atmospheric particles, Raman spectroscopy, Aerosols, Clouds, Convection, Scattering, Atmospheric optics, Temperature metrology, Molecules

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Proceedings Article | 26 August 2015 Paper

UV resonance Raman signatures of phonon-allowed absorptions and phonon-driven bubble formation

Hans Hallen, Adam Willitsford, Reagan Weeks, C. Russell Philbrick

Proceedings Volume 9584, 95840P (2015) https://doi.org/10.1117/12.2188528

KEYWORDS: Raman spectroscopy, Absorption, Liquids, Molecules, Laser scattering, Phonons, Spectroscopy, Ultraviolet radiation, Cameras, Calibration

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Proceedings Article | 5 September 2014 Paper

Time and neighbor interaction in resonance Raman spectroscopy

Hans Hallen, Shupeng Niu, Ling Li

Proceedings Volume 9198, 91980F (2014) https://doi.org/10.1117/12.2062001

KEYWORDS: Raman spectroscopy, Absorption, Molecules, Metals, Resonance enhancement, Liquids, Phonons, Aluminum, Antennas, Plasmons

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Proceedings Article | 9 June 2014 Paper

Remote aerosol species-identification using IR scattering spectroscopy

Shupeng Niu, C. Russell Philbrick, Hans Hallen

Proceedings Volume 9080, 908010 (2014) https://doi.org/10.1117/12.2050689

KEYWORDS: Scattering, Aerosols, Particles, Atmospheric particles, Mie scattering, Refractive index, Chemical analysis, Light scattering, Dielectrics, Infrared spectroscopy

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Proceedings Article | 9 June 2014 Paper

Laser remote sensing of species concentrations and dynamical processes

C. Russell Philbrick, Hans Hallen

Proceedings Volume 9080, 90800Z (2014) https://doi.org/10.1117/12.2050696

KEYWORDS: LIDAR, Raman spectroscopy, Raman scattering, Molecules, Water, Atmospheric particles, Clouds, Aerosols, Absorption, Tunable lasers

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Proceedings Article | 28 September 2013 Paper

Coherence in UV resonance Raman spectroscopy of liquid benzene and toluene, but not ice

Hans Hallen, Ryan Neely, Adam Willitsford, C. Chadwick, C. Philbrick

Proceedings Volume 8845, 884511 (2013) https://doi.org/10.1117/12.2024313

KEYWORDS: Absorption, Raman spectroscopy, Liquids, Molecules, Optical parametric oscillators, Ultraviolet radiation, Raman scattering, Resonance enhancement, Data modeling, Phonons

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Proceedings Article | 28 May 2013 Paper

Optical extinction dependence on wavelength and size distribution of airborne dust

Garrett Pangle, D. Hook, Brandon Long, C. Philbrick, Hans Hallen

Proceedings Volume 8731, 87310N (2013) https://doi.org/10.1117/12.2017850

KEYWORDS: Particles, Atmospheric particles, Scattering, Multiple scattering, Laser scattering, Aerosols, Atmospheric optics, Absorption, Visible radiation, Atmospheric propagation

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Proceedings Article | 20 May 2013 Paper

Multistatic lidar measurements of non-spherical aerosols

Hans Hallen, Brandon Long, D. Hook, Garrett Pangle, C. Philbrick

Proceedings Volume 8731, 87310P (2013) https://doi.org/10.1117/12.2017710

KEYWORDS: Particles, Scattering, Polarization, Mie scattering, Light scattering, Atmospheric particles, Optical spheres, Aerosols, Scanning electron microscopy, LIDAR

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Proceedings Article | 20 May 2013 Paper

Understanding lidar returns from complex dust mixtures

D. Hook, Garrett Pangle, Brandon Long, C. Philbrick, Hans Hallen

Proceedings Volume 8731, 87310M (2013) https://doi.org/10.1117/12.2017698

KEYWORDS: Refraction, Ellipsometry, Silica, Absorption, Particles, Refractive index, Atmospheric particles, Scattering, Dielectrics, Reflection

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Proceedings Article | 20 May 2013 Paper

Using a laser aureole to study aerosols

Brandon Long, D. Hook, Garrett Pangle, Hans Hallen, C. Philbrick

Proceedings Volume 8731, 87310O (2013) https://doi.org/10.1117/12.2017707

KEYWORDS: Scattering, Mie scattering, Laser scattering, Particles, Optical spheres, Minerals, Aerosols, Atmospheric particles, Refraction, Silica

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Proceedings Article | 29 April 2010 Paper

Optical remote sensing techniques characterize the properties of atmospheric aerosols

Russell Philbrick, Hans Hallen, Andrea Wyant, Tim Wright, Michelle Snyder

Proceedings Volume 7684, 76840J (2010) https://doi.org/10.1117/12.850453

KEYWORDS: Aerosols, Scattering, LIDAR, Laser scattering, Raman spectroscopy, Raman scattering, Atmospheric particles, Polarization, Atmospheric optics, Refractive index

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Proceedings Article | 16 April 2008 Paper

Resonance Raman measurements utilizing a deep UV source

Adam Willitsford, C. Todd Chadwick, Hans Hallen, C. Russell Philbrick

Proceedings Volume 6950, 69500A (2008) https://doi.org/10.1117/12.778253

KEYWORDS: Raman scattering, Raman spectroscopy, Resonance enhancement, Diamond, Optical parametric oscillators, Laser scattering, Ultraviolet radiation, Spectroscopy, Scattering, Absorption

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Proceedings Article | 20 June 2002 Paper

Interferometric method to characterize thermal elongation of near-field optics probes

Andres La Rosa, Bjorn Biehler, Arijit Sinharay, Hans Hallen

Proceedings Volume 4777, (2002) https://doi.org/10.1117/12.472244

KEYWORDS: Near field optics, Near field scanning optical microscopy, Polarization, Metals, Interferometry, Mirrors, Fabry–Perot interferometers, Near field, Feedback control, Thermography

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Proceedings Article | 13 October 1998 Paper

Raman spectroscopy: probing the border between near-field and far-field spectroscopy

Hans Hallen, Michael Paesler, Catherine Jahncke

Proceedings Volume 3467, (1998) https://doi.org/10.1117/12.326819

KEYWORDS: Raman spectroscopy, Near field, Near field scanning optical microscopy, Raman scattering, Ferroelectric materials, Spectroscopy, Spectroscopes, Micro raman spectroscopy, Rayleigh scattering, Physics

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Proceedings Article | 6 September 1995 Paper

Thermal/temporal response of the NSOM probe/sample system

Hans Hallen, Boris Yakobson, Andres La Rosa, Michael Paesler

Proceedings Volume 2535, (1995) https://doi.org/10.1117/12.218693

KEYWORDS: Near field scanning optical microscopy, Visible radiation, Silicon, Infrared imaging, Thermography, Infrared radiation, Thermal effects, Modulation, Fiber coatings

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Proceedings Article | 30 March 1995 Paper

Time-resolved contrast in near-field scanning optical microscopy of semiconductors

Andres La Rosa, Catherine Jahncke, Hans Hallen

Proceedings Volume 2384, (1995) https://doi.org/10.1117/12.205917

KEYWORDS: Near field scanning optical microscopy, Visible radiation, Signal detection, Silicon, Near field optics, Infrared radiation, Semiconductors, Semiconducting wafers, Infrared imaging, Infrared detectors

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Proceedings Article | 3 October 1993 Paper

Ballistic electron emission microscopy: from electron transport physics to nanoscale materials science

Hans Hallen

Proceedings Volume 10310, 103100G (1993) https://doi.org/10.1117/12.183190

Proceedings Article | 4 June 1993 Paper

High-resolution scanning Hall probe microscopy

Hans Hallen, H. Hess, A. Chang, Loren Pfeiffer, Kenneth West, David Mitzi

Proceedings Volume 1855, (1993) https://doi.org/10.1117/12.146371

KEYWORDS: Magnetism, Superconductors, Scanning probe microscopy, Crystals, Temperature metrology, Microscopes, Microscopy, Data modeling, Spatial resolution, Metals

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Showing 5 of 35 publications

Conference Committee Involvement (30)

UV and Higher Energy Photonics: From Materials to Applications 2025

3 August 2025 | San Diego, California, United States

Ultrafast Nonlinear Imaging and Spectroscopy XIII

3 August 2025 | San Diego, California, United States

Laser Radar Technology and Applications XXX

16 April 2025 | Orlando, Florida, United States

UV and Higher Energy Photonics: From Materials to Applications 2024

18 August 2024 | San Diego, California, United States

Ultrafast Nonlinear Imaging and Spectroscopy XII

18 August 2024 | San Diego, California, United States

Laser Radar Technology and Applications XXIX

24 April 2024 | National Harbor, Maryland, United States

Ultrafast Nonlinear Imaging and Spectroscopy XI

21 August 2023 | San Diego, California, United States

UV and Higher Energy Photonics: From Materials to Applications 2023

20 August 2023 | San Diego, California, United States

Laser Radar Technology and Applications XXVIII

3 May 2023 | Orlando, Florida, United States

UV and Higher Energy Photonics: From Materials to Applications 2022

21 August 2022 | San Diego, California, United States

Ultrafast Nonlinear Imaging and Spectroscopy X

21 August 2022 | San Diego, California, United States

Laser Radar Technology and Applications XXVII

5 April 2022 | Orlando, Florida, United States

UV and Higher Energy Photonics: From Materials to Applications 2021

2 August 2021 | San Diego, California, United States

Ultrafast Nonlinear Imaging and Spectroscopy IX

1 August 2021 | San Diego, California, United States

Laser Radar Technology and Applications XXVI

12 April 2021 | Online Only, Florida, United States

UV and Higher Energy Photonics: From Materials to Applications 2020

25 August 2020 | Online Only, California, United States

Ultrafast Nonlinear Imaging and Spectroscopy VIII

24 August 2020 | Online Only, California, United States

Laser Radar Technology and Applications XXV

27 April 2020 | Online Only, California, United States

UV and Higher Energy Photonics: From Materials to Applications 2019

11 August 2019 | San Diego, California, United States

Ultrafast Nonlinear Imaging and Spectroscopy VII

11 August 2019 | San Diego, California, United States

Laser Radar Technology and Applications XXIV

16 April 2019 | Baltimore, MD, United States

Ultrafast Nonlinear Imaging and Spectroscopy VI

19 August 2018 | San Diego, California, United States

UV and Higher Energy Photonics: From Materials to Applications 2018

19 August 2018 | San Diego, California, United States

Ultrafast Nonlinear Imaging and Spectroscopy V

6 August 2017 | San Diego, California, United States

UV and Higher Energy Photonics: From Materials to Applications 2017

6 August 2017 | San Diego, California, United States

Ultrafast Nonlinear Imaging and Spectroscopy IV

28 August 2016 | San Diego, California, United States

UV and Higher Energy Photonics: From Materials to Applications

28 August 2016 | San Diego, California, United States

Ultrafast Nonlinear Imaging and Spectroscopy III

9 August 2015 | San Diego, California, United States

Ultrafast Nonlinear Imaging and Spectroscopy II

17 August 2014 | San Diego, California, United States

Ultrafast Imaging and Spectroscopy

25 August 2013 | San Diego, California, United States

Showing 5 of 30 Conference Committees

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