Prof. Venkatraman Gopalan Profile

Prof. Venkatraman Gopalan

Professor at Pennsylvania State Univ

SPIE Involvement:

Author

Publications (20)

Proceedings Article | 3 October 2024 Presentation

Second harmonic generation microscopy: experiments and theory

Albert Suceava, Akash Saha, Venkatraman Gopalan

Proceedings Volume 13139, 1313909 (2024) https://doi.org/10.1117/12.3029590

KEYWORDS: Second harmonic generation, Microscopy, Lenses, Data modeling, Crystals, Biological samples, Polarization, Polarimetry, Microscopes, Biosensing

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Proceedings Article | 5 October 2023 Presentation + Paper

Generalized analytical and numerical modeling of optical second harmonic generation in anisotropic crystals and complex heterostructures using ♯SHAARP package

Rui Zu, Bo Wang, Jingyang He, Lincoln Weber, Jian-Jun Wang, Long-Qing Chen, Venkatraman Gopalan

Proceedings Volume 12681, 1268106 (2023) https://doi.org/10.1117/12.2676223

KEYWORDS: Second harmonic generation, Interfaces, Crystals, Heterojunctions, Polarimetry, Human-machine interfaces, Complex systems, Wave propagation, Polarization, Multilayers

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Proceedings Article | 5 October 2023 Presentation

Enhancement of second-order optical nonlinearities and UV second harmonic generation from periodically poled boron-substituted aluminum nitride thin films

Albert Suceava, John Hayden, Kyle Kelley, Yihuang Xiong, Ismaila Dabo, Susan Trolier-McKinstry, Jon-Paul Maria, Venkatraman Gopalan

Proceedings Volume PC12652, PC1265202 (2023) https://doi.org/10.1117/12.2677814

KEYWORDS: Second harmonic generation, Ultraviolet radiation, Nonlinear optics, Aluminum nitride, Thin films, Waveguides, Ranging, Photonic devices, Optical properties, Nonlinear optical materials

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Proceedings Article | 17 March 2023 Presentation

♯SHAARP: an open-source package for analytical and numerical modeling of optical second harmonic generation in anisotropic crystals

Rui Zu, Bo Wang, Jingyang He, Jianjun Wang, Lincoln Weber, Long-Qing Chen, Venkatraman Gopalan

Proceedings Volume PC12405, PC124050V (2023) https://doi.org/10.1117/12.2647729

KEYWORDS: Crystals, Second-harmonic generation, Nonlinear crystals, Crystallography, Harmonic generation, Polarimetry, Numerical modeling, Software development, Reflection, Photons

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Proceedings Article | 9 September 2019 Presentation

Ultrafast quasiparticle dynamics in correlated semimetals (Conference Presentation)

Venkatraman Gopalan, Yakun Yuan, Peter Kissin, Danilo Puggioni, Kevin Cremin, Zhiqiang Mao, James Rondinelli, Richard Averitt, Haricharan Padmanabhan

Proceedings Volume 11122, 1112208 (2019) https://doi.org/10.1117/12.2532022

KEYWORDS: Ultrafast phenomena, Metalloids, Quasiparticles, Magnetism, Ultrafast laser spectroscopy, Optical spectroscopy, Spectroscopy, Particles, Quantum physics, Thermodynamics

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Proceedings Article | 17 September 2018 Presentation

Light-activated gigahertz ferroelectric domain dynamics (Conference Presentation)

Venkatraman Gopalan, Hirofumi Akamatsu, Yakun Yuan, Vladimir Stoica, Gregory Stone, Tiannan Yang, Zijian Hong, Shiming Lei, Yi Zhu, John Freeland, Long-Qing Chen, Haidan Wen

Proceedings Volume 10753, 107530A (2018) https://doi.org/10.1117/12.2322964

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Proceedings Article | 23 April 2018 Paper

Nanoscale surface phononic crystals for characterization of complex and periodic materials using extreme ultraviolet light

T. Frazer, B. Abad, J. Knobloch, J. Hernandez-Charpak, H. Cheng, A. Grede, N. Giebink, T. Mallouk, P. Mahale, W. Chen, Y. Xiong, I. Dabo, V. Crespi, D. Talreja, V. Gopalan, J. Badding, H. Kapteyn, M. Murnane

Proceedings Volume 10600, 106001Y (2018) https://doi.org/10.1117/12.2296704

KEYWORDS: Crystals, Extreme ultraviolet, Acoustics, Metamaterials, Thermoelectric materials, Ultrafast phenomena, Near infrared, Nanolithography, Spectroscopy, Diffraction

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Proceedings Article | 2 November 2016 Presentation

X-ray diffraction and spectroscopy of photoinduced ferroic superstructures (Conference Presentation)

Vladimir Stoica, Haidan Wen, Xiaoyi Zhang, Zhan Zhang, John Freeland, Lane Martin, Ramamoorthy Ramesh, Venkatraman Gopalan

Proceedings Volume 9956, 99560W (2016) https://doi.org/10.1117/12.2238708

KEYWORDS: Imaging spectroscopy, Spectroscopes, Ultrafast laser spectroscopy, X-ray diffraction, Complex oxides, Spectroscopy, Spintronics, Superconductors, Visualization, Oxides

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Proceedings Article | 2 November 2016 Presentation

Ultrafast spatio-temporal mapping of gigahertz lattice distortion in a ferroelectric crystal (Conference Presentation)

Venkatraman Gopalan, Yakun Yuan

Proceedings Volume 9956, 99560S (2016) https://doi.org/10.1117/12.2238307

KEYWORDS: Imaging spectroscopy, Temporal resolution, X-ray optics, Crystals, Ferroelectric materials, Picosecond phenomena, Ultrafast phenomena, Distortion, Synchrotrons, X-rays

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Proceedings Article | 20 February 2015 Paper

Templated growth of II-VI semiconductor optical fiber devices and steps towards infrared fiber lasers

Pier Sazio, Justin Sparks, Rongrui He, Mahesh Krishnamurthi, Thomas Fitzgibbons, Subhasis Chaudhuri, Neil Baril, Anna Peacock, Noel Healy, Venkatraman Gopalan, John Badding

Proceedings Volume 9342, 93420A (2015) https://doi.org/10.1117/12.2083045

KEYWORDS: Semiconductors, Optical fibers, Waveguides, Silica, Fiber lasers, Zinc, Micro optical fluidics, Surface roughness, Crystals, Capillaries

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Proceedings Article | 2 March 2007 Paper

Integrated optoelectronics in an optical fiber

J. Badding, P. Sazio, V. Gopalan, A. Amezcua Correa, T. Scheidemantel, C. Finlayson, N. Baril, B. Jackson, D. Wong

Proceedings Volume 6475, 64750N (2007) https://doi.org/10.1117/12.700725

KEYWORDS: Optical fibers, Silicon, Semiconductors, Optoelectronics, Germanium, Micro optical fluidics, Field effect transistors, Silica, Cladding, Structured optical fibers

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Proceedings Article | 28 February 2006 Paper

Spatial mapping of fluorescence and Raman spectra across grain boundaries in a transparent Nd-YAG ceramic laser material

Sang-Ho Lee, Joseph Stitt, William White, Gary Messing, Venkatraman Gopalan

Proceedings Volume 6100, 610011 (2006) https://doi.org/10.1117/12.642405

KEYWORDS: Raman spectroscopy, Luminescence, Confocal microscopy, Ceramics, Nd:YAG lasers, Raman scattering, Scattering, YAG lasers, Neodymium, Atomic force microscopy

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Proceedings Article | 11 November 2005 Paper

Fabrication of extreme aspect ratio wires within photonic crystal fibers

J. Badding, P. Sazio, A. Amezcua Correa, T. Scheidemantel, C. Finlayson, N. Baril, D.-J. Won, H. Fang, B. Jackson, A. Borhan, V. Gopalan

Proceedings Volume 6005, 60050I (2005) https://doi.org/10.1117/12.632675

KEYWORDS: Micro optical fluidics, Silicon, Semiconductors, Capillaries, Germanium, Optical fibers, Silica, Deposition processes, Waveguides, Nanowires

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Proceedings Article | 31 March 2005 Paper

Comparison of domain reversal and electro-optic properties of congruent and stoichiometric lithium tantalate

Lili Tian, Venkatraman Gopalan

Proceedings Volume 5728, (2005) https://doi.org/10.1117/12.591877

KEYWORDS: Electrodes, Crystals, Electro optics, Lithium, Metals, Platinum, Polarization, Dielectric polarization, Surface finishing, Laser damage threshold

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Proceedings Article | 25 October 2004 Paper

Tunable electro-optic microphotonic devices in ferroelectrics

David Scrymgeour, Venkat Gopalan, Kevin Gahagan

Proceedings Volume 5595, (2004) https://doi.org/10.1117/12.571672

KEYWORDS: Scanners, Electro optics, Crystals, Lenses, Electrodes, Beam propagation method, Prisms, Refraction, Integrated optics, Optical lithography

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Proceedings Article | 12 December 2002 Paper

Widely tunable nonlinear liquid crystal-based photonic crystals

Iam-Choon Khoo, Yana Zhang, Andrew Diaz, Jianwu Ding, Ivan Divliansky, Kito Holliday, Theresa Mayer, V. Crespi, David Scrymgeour, V. Gopalan

Proceedings Volume 4799, (2002) https://doi.org/10.1117/12.453287

KEYWORDS: Liquid crystals, Photonic crystals, Crystals, Refractive index, Liquids, Diffraction gratings, Switching, Nonlinear crystals, Switches, Pulsed laser operation

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Proceedings Article | 26 October 2000 Paper

Integrated high-power electro-optic lens/scanner for space-based platforms

Kevin Gahagan, Joanna Casson, Venkatraman Gopalan, David Scrymgeour, Jeanne Robinson

Proceedings Volume 4134, (2000) https://doi.org/10.1117/12.405336

KEYWORDS: Electro optics, Scanners, Crystals, Prisms, Oxides, Beam propagation method, Refractive index, Electrodes, Data communications, Lithium

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Proceedings Article | 26 March 1999 Paper

Fabrication and characterization of high-speed integrated electro-optic lens and scanner devices

Kevin Gahagan, Venkatraman Gopalan, Jeanne Robinson, Quanxi Jia, T. Mitchell, Matthew Kawas, Tuviah Schlesinger, Daniel Stancil

Proceedings Volume 3620, (1999) https://doi.org/10.1117/12.343750

KEYWORDS: Scanners, Electro optics, Crystals, Collimation, Electrodes, Lens design, Channel waveguides, Beam propagation method, Semiconducting wafers, Optical simulations

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Proceedings Article | 10 May 1996 Paper

Internal field in lithium tantalate single crystals

Venkatraman Gopalan, Mool Gupta

Proceedings Volume 2700, (1996) https://doi.org/10.1117/12.239659

KEYWORDS: Crystals, Polarization, Ions, Absorption, Infrared radiation, Tantalum, Lithium, Temperature metrology, Niobium, Nonlinear optics

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Proceedings Article | 10 May 1996 Paper

Periodic domain inversion in Z-cut LiTaO3 by electron beam scanning assisted by an internal field within the crystal

Venkatraman Gopalan, Alan Nutt, Mool Gupta

Proceedings Volume 2700, (1996) https://doi.org/10.1117/12.239671

KEYWORDS: Crystals, Electron beams, Polarization, Laser crystals, Scanning electron microscopy, Dielectric polarization, Second-harmonic generation, Electron microscopes, Dielectric breakdown, Solid state lasers

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