Prof. Uwe H. Hömmerich Profile

Prof. Uwe H. Hömmerich

Professor at Hampton Univ

SPIE Involvement:

Author

Publications (36)

Proceedings Article | 9 March 2024 Presentation

Mid-IR spectroscopic investigation of Dy3+ doped low-phonon chalcogenide glasses

Ei Brown, Zackery Fleischman, Jason McKay, Uwe Hommerich, Witold Palosz, Sudhir Trivedi, Mark Dubinskii

Proceedings Volume PC12882, PC128820D (2024) https://doi.org/10.1117/12.3002984

KEYWORDS: Mid-IR, Chalcogenide glass, Spectroscopy, Glasses, Laser applications, Ions, Time metrology, Solubility, Semiconductor lasers, Phonons

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SPIE Journal Paper | 24 June 2023

Numerical analysis of the propagation modes of photo-switching PDMS-arylazopyrazole optical waveguide and thin-film spectroscopic characterization

Golsa Mirbagheri, Ikemefuna Uba, Kesete Ghebreyessus, Uwe Hömmerich, Seth Fraden, Michael Stehnach, Demetris Geddis

JNP, Vol. 17, Issue 02, 026014, (June 2023) https://doi.org/10.1117/12.10.1117/1.JNP.17.026014

KEYWORDS: Refractive index, Waveguides, Polydimethylsiloxane, Composites, Ultraviolet radiation, Thin films, Polymers, Numerical analysis, Matrices, Polymer thin films

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Proceedings Article | 15 June 2023 Presentation

Exploring the mid-IR potential of Dy3+ doped low-phonon crystals and glasses

Zackery Fleischman, Ei Ei Brown, Mark Dubinskii, Jason McKay, Uwe Hömmerich, Witold Palosz, Sudhir Trivedi

Proceedings Volume PC12515, PC1251506 (2023) https://doi.org/10.1117/12.2666002

KEYWORDS: Mid-IR, Crystals, Glasses, Chalcogenide glass, Wind energy, Phonons, Spectroscopy, Visible radiation, Transparency, Medical procedures

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Proceedings Article | 17 March 2023 Poster + Paper

Numerical analysis of the propagation modes of photo-switching PDMS-arylazopyrazole optical waveguide and thin-film spectroscopic characterization

Golsa Mirbagheri, Ikemefuna Uba, Kesete Ghebreyessus, Uwe Hömmerich, Seth Fraden, Michael Stehnach, Demetris Geddis

Proceedings Volume 12424, 124241L (2023) https://doi.org/10.1117/12.2668000

KEYWORDS: Waveguides, Polydimethylsiloxane, Refractive index, Composites, Polymers, Ultraviolet radiation, Thin films, Matrices, Fabrication, Wave propagation

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Proceedings Article | 14 March 2023 Presentation

Spectroscopic characterization of Er3+ doped low-phonon crystalline materials and chalcogenide glasses (Conference Presentation)

Ei Brown, Zackery Fleischman, Jason McKay, Uwe Hömmerich, Witold Palosz, Sudhir Trivedi, Mark Dubinskii

Proceedings Volume 12417, 1241703 (2023) https://doi.org/10.1117/12.2647890

KEYWORDS: Crystals, Spectroscopy, Chalcogenide glass, Mid-IR, Glasses, Infrared lasers, Transparency, Solid state lasers, Solid state electronics, Remote sensing

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Proceedings Article | 30 May 2022 Presentation

Spectroscopic investigation of rare-earth doped CsCdCl3 crystals for potential mid-IR (3-5 um) laser sources

Ei Brown, Zackery Fleischman, Jason McKay, Amin Kabir, Uwe Hommerich, Sudhir Trivedi, Mark Dubinskii

Proceedings Volume PC12092, PC1209203 (2022) https://doi.org/10.1117/12.2621892

KEYWORDS: Mid-IR, Spectroscopy, Crystals, Luminescence, Laser sources, Laser crystals, Phonons, Laser development, Erbium lasers, Solid state lasers

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Proceedings Article | 30 May 2022 Presentation

Low-phonon rare-earth doped GaGe-based chalcogenide glasses for mid-IR laser gain materials

Ei Brown, Zackery Fleischman, Jason McKay, Jazmine Riggins, Uwe Hommerich, Witold Palosz, Sudhir Trivedi, Mark Dubinskii

Proceedings Volume PC12092, PC1209202 (2022) https://doi.org/10.1117/12.2621756

KEYWORDS: Mid-IR, Chalcogenide glass, Solid state lasers, Transparency, Surgery, Spectroscopy, Selenium, Remote sensing, Phonons, Oxides

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Proceedings Article | 1 April 2022 Presentation

Comparative mid-IR emission study of holmium doped low-phonon fluoride and chloride crystals

Ei Brown, Zackery Fleischman, Uwe Hömmerich, Sudhir Trivedi, Mark Dubinskii

Proceedings Volume PC11997, PC119970A (2022) https://doi.org/10.1117/12.2610206

KEYWORDS: Mid-IR, Crystals, Holmium, Crystallography, Ions, Spectroscopy, Phonons, Laser crystals, Solid state lasers, Medicine

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Proceedings Article | 6 May 2021 Poster + Presentation + Paper

Comparative steady-state and time-resolved emission spectroscopy of Mn-doped CsPbCl3 perovskite nanoparticles and bulk single crystals for photonic applications

U. Hömmerich, J. Barnett, A. Kabir, K. Ghebreyessus, K. Hampton, S. Uba, I. Uba, D. Geddis, C. Yang, S. Trivedi, S. Fraden, S. Ali Aghvami

Proceedings Volume 11682, 116821J (2021) https://doi.org/10.1117/12.2582217

KEYWORDS: Nanoparticles, Photonic crystals, Manganese, Perovskite, Crystals, Emission spectroscopy, Ions, Compound parabolic concentrators, Visible radiation

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Proceedings Article | 12 April 2021 Presentation + Paper

Comparative study of rare-earth doped low-phonon fluoride and chloride crystals for mid-IR laser potential

E. Brown, Z. Fleischman, J. McKay, U. Hömmerich, S. Trivedi, M. Dubinskii

Proceedings Volume 11724, 117240C (2021) https://doi.org/10.1117/12.2587796

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Proceedings Article | 5 March 2021 Poster + Presentation

Spectroscopy of the lower lying energy levels in Pr3+ doped TlPb2Br5 and CsPbCl3 for mid-IR laser application

Uwe Hömmerich, AlAmin Kabir, Lanijah Flagg, Althea Bluiett, Clayton Yang, Sudhir Trivedi

Proceedings Volume 11682, 116821C (2021) https://doi.org/10.1117/12.2576922

KEYWORDS: Mid-IR, Spectroscopy, Laser applications, Optical pumping, Crystals, Absorption

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Proceedings Article | 5 March 2021 Presentation + Paper

Mid-IR emission characteristics of low-phonon erbium-doped ternary chloride-based single crystals

E. Brown, Z. Fleischman, R. Hawrami, E. Ariesanti, A. Burger, U. Hömmerich, S. Trivedi, M. Dubinskii

Proceedings Volume 11682, 116820R (2021) https://doi.org/10.1117/12.2579430

KEYWORDS: Mid-IR, Crystals, Erbium, Spectroscopy, Phonons, Ions, Surgery, Solid state lasers, Semiconductor lasers, Remote sensing

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Proceedings Article | 8 May 2020 Paper

A novel standoff simultaneous UVN + LWIR laser induced breakdown spectroscopy (LIBS) detection system for rapid in-situ chemical analysis

Clayton S. Yang, Feng Jin, Sudhir Trivedi, Uwe Hömmerich, Laszlo Nemes, Alan Samuels

Proceedings Volume 11418, 114180I (2020) https://doi.org/10.1117/12.2565159

KEYWORDS: Laser induced breakdown spectroscopy, Long wavelength infrared, Spectroscopy, Infrared spectroscopy, Chemical analysis, Infrared signatures, Molecular spectroscopy, Mid-IR

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Proceedings Article | 3 March 2020 Paper

Materials development and mid-infrared emission properties of Dy-doped TlPb2Br5 and CsPbCl3

U. Hömmerich, D. Hart, A. Kabir, C. Yang, S. B. Trivedi

Proceedings Volume 11276, 112761D (2020) https://doi.org/10.1117/12.2542697

KEYWORDS: Dysprosium, Mid-IR, Infrared spectroscopy, Crystals, Absorption, Bromine, Spectroscopy, Lead, Solid state lasers

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Proceedings Article | 14 May 2019 Presentation

Materials development and optical properties of Pr-doped ternary lead halides (TlPb2Br5, KPb2Br5, CsPbCl3) for infrared laser applications (Conference Presentation)

Sudhir Trivedi, Uwe Hömmerich, Al Amin Kabir, Althea Bluiett

Proceedings Volume 10981, 1098105 (2019) https://doi.org/10.1117/12.2521674

KEYWORDS: Praseodymium, Lead, Infrared lasers, Optical properties, Crystals, Laser applications, Mid-IR, Spectroscopy, Laser crystals, Ions

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Proceedings Article | 19 September 2016 Paper

Probing organic residues on Martian regolith simulants using a long-wave infrared Laser-induced breakdown spectroscopy linear array detection system

Narasimha Prasad, Clayton S.-C. Yang, Feng Jin, Ken Jia, EiEi Brown, Uwe Hömmerich, Yingqing Jia, Sudhir Trivedi, Priyalal Wijewarnasuriya, Eric Decuir, Alan Samuels

Proceedings Volume 9981, 99810I (2016) https://doi.org/10.1117/12.2242901

KEYWORDS: Laser induced breakdown spectroscopy, Long wavelength infrared, Detector arrays, Visible radiation, Infrared spectroscopy, Infrared radiation, Molecular lasers, Infrared detectors, Pulsed laser operation, Molecules

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Proceedings Article | 13 May 2016 Paper

Eye-safe infrared laser-induced breakdown spectroscopy (LIBS) emissions from energetic materials

Ei Brown, Uwe Hömmerich, Clayton Yang, Feng Jin, Sudhir Trivedi, Alan Samuels

Proceedings Volume 9824, 98241B (2016) https://doi.org/10.1117/12.2225231

KEYWORDS: Laser induced breakdown spectroscopy, Infrared spectroscopy, Infrared radiation, Long wavelength infrared, Nd:YAG lasers, Potassium, FT-IR spectroscopy, Aluminum, Cements, Sensors

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Proceedings Article | 12 May 2016 Paper

Chemical and explosive detection with long-wave infrared laser induced breakdown spectroscopy

Feng Jin, Sudhir Trivedi, Clayton Yang, Ei Brown, Eric Kumi-Barimah, Uwe Hommerich, Alan Samuels

Proceedings Volume 9824, 98240Q (2016) https://doi.org/10.1117/12.2223427

KEYWORDS: Laser induced breakdown spectroscopy, Long wavelength infrared, Explosives detection, Infrared lasers, Spectroscopy, Explosives, Pulsed laser operation, Detector arrays, Electronics, Liquids

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Proceedings Article | 24 February 2016 Paper

White-light emission studies of dysprosium-doped halide crystals

B. Rami Reddy, Mical Culp, Sudhir Trivedi, Uwe Hommerich, EiEi Brown

Proceedings Volume 9744, 974406 (2016) https://doi.org/10.1117/12.2209405

KEYWORDS: Phonons, Luminescence, Crystals, Absorption, Ions, Crystallography, Lead, Light emitting diodes, Diodes, Potassium

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Proceedings Article | 16 March 2015 Paper

Optical properties of Pr3+-, Ce3+-, and Eu2+-doped ternary lead halides

Ei Brown, Althea Bluiett, Uwe Hömmerich, Sudhir Trivedi

Proceedings Volume 9359, 93591U (2015) https://doi.org/10.1117/12.2079426

KEYWORDS: Absorption, Crystals, Ions, Praseodymium, Upconversion, Mid-IR, Luminescence, Lead, Spectroscopy, Scintillators

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Proceedings Article | 10 March 2015 Paper

Comparative spectroscopic studies of Ho: KPb2Cl5, Ho: KPb2Br5, and Ho: YAG for 2 µm laser cooling applications

Ei Brown, Uwe Hömmerich, Eric Kumi-Barimah, Althea Bluiett, Sudhir Trivedi

Proceedings Volume 9380, 93800O (2015) https://doi.org/10.1117/12.2077722

KEYWORDS: Crystals, Holmium, Absorption, Quantum efficiency, YAG lasers, Fiber lasers, Luminescence, Spectroscopy, Laser applications, Infrared radiation

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Proceedings Article | 7 March 2014 Paper

Infrared absorption and fluorescence properties of Ho-doped KPb2Br5

Ei Brown, Uwe Hömmerich, Simone Hyater-Adams, Olusola Oyebola, Althea Bluiett, Sudhir Trivedi

Proceedings Volume 8982, 89821S (2014) https://doi.org/10.1117/12.2037948

KEYWORDS: Absorption, Holmium, Crystals, Quantum efficiency, Infrared radiation, Luminescence, Solid state lasers, Infrared spectroscopy, Spectroscopy, Phonons

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Proceedings Article | 28 February 2014 Paper

Spectroscopic properties of Pr-doped PbCl2 for eye-safe 1.6µm laser applications

Ivy Jones, Uwe Hömmerich, EiEi Brown, Sudhir Trivedi

Proceedings Volume 8959, 89591T (2014) https://doi.org/10.1117/12.2037374

KEYWORDS: Absorption, Crystals, Ions, Laser applications, Laser crystals, Spectroscopy, Optical pumping, Semiconductor lasers, Erbium, Laser development

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Proceedings Article | 19 February 2014 Paper

Spectroscopic evaluation of Tm-doped potassium lead halides for 2um laser-cooling applications

Eric Kumi-Barimah, Uwe Hömmerich, EiEi Brown, Sudhir Trivedi

Proceedings Volume 9000, 90000O (2014) https://doi.org/10.1117/12.2037412

KEYWORDS: Luminescence, Thulium, Crystals, Absorption, Laser crystals, Infrared imaging, Potassium, Crystallography, Solids, Spectroscopy

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Proceedings Article | 29 May 2013 Paper

Infrared (1-12 um) atomic and molecular emission signatures from energetic materials using laser induced breakdown spectroscopy

E. Kumi Barimah, U. Hömmerich, E. Brown, C. S.-C. Yang, S. Trivedi, F. Jin, P. Wijewarnasuriya, A. Samuels, A. Snyder

Proceedings Volume 8710, 87100V (2013) https://doi.org/10.1117/12.2017913

KEYWORDS: Laser induced breakdown spectroscopy, Infrared signatures, Long wavelength infrared, Sodium, Near infrared, Potassium, Infrared radiation, Chemical species, Infrared spectroscopy, FT-IR spectroscopy

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Proceedings Article | 11 March 2013 Paper

Upconversion and 1.5 µm - 1.6 µm infrared emission studies of Er3+ doped in the low phonon-energy hosts KPb2Cl5 and KPb2Br5 via 1.5 µm laser excitation

Althea Bluiett, Ei Brown, Craig Hanley, Uwe Hömmerich, Sudhir Trivedi

Proceedings Volume 8621, 86211A (2013) https://doi.org/10.1117/12.2003192

KEYWORDS: Erbium, Upconversion, Absorption, Infrared radiation, Crystals, Pulsed laser operation, Continuous wave operation, Ions, Energy transfer, Crystallography

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Proceedings Article | 6 March 2013 Paper

Spectroscopic characterization and upconversion processes under ~1.5 um pumping in Er doped Yttria ceramics

Ei Brown, Uwe Hommerich, Althea Bluiett, Courtney Kucera, John Ballato, Sudhir Trivedi

Proceedings Volume 8599, 859929 (2013) https://doi.org/10.1117/12.2002522

KEYWORDS: Upconversion, Ceramics, Absorption, Erbium, Spectroscopy, Crystals, Nanocrystals, Energy transfer, Laser applications, Ions

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Proceedings Article | 4 June 2011 Paper

Infrared laser-induced breakdown spectroscopy emissions from energetic materials

Clayton Yang, E. Brown, Uwe Hommerich, Sudhir Trivedi, Alan Samuels, A. Peter Snyder

Proceedings Volume 8018, 80181P (2011) https://doi.org/10.1117/12.876375

KEYWORDS: Laser induced breakdown spectroscopy, Nitrogen, FT-IR spectroscopy, Infrared spectroscopy, Chemical analysis, Infrared signatures, Molecules, Explosives, Carbonates, Chemical species

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Proceedings Article | 17 February 2010 Paper

Enhanced 5-µm emission in Tm,Tb: KPb[sub]2[/sub]Br[sub]5[/sub] and Tm,Nd:KPb[sub]2[/sub]Br[sub]5[/sub] for mid-infrared laser applications

A. Bluiett, D. Peele, K. Norman, E. Brown, U. Hommerich, S. Trivedi, J. Zavada

Proceedings Volume 7578, 75782I (2010) https://doi.org/10.1117/12.842188

KEYWORDS: Thulium, Energy transfer, Neodymium, Terbium, Absorption, Ions, Energy efficiency, Laser applications, Bromine, Mid-IR

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Proceedings Article | 28 February 2009 Paper

Development of ceramic solid state laser host materials

Narasimha Prasad, Sudhir Trivedi, Susan Kutcher, Chen-Chia Wang, Joo-Soo Kim, Uwe Hommerich, Vijay Shukla, Rajendra Sadangi

Proceedings Volume 7193, 71931X (2009) https://doi.org/10.1117/12.813785

KEYWORDS: Ceramics, Neodymium, Oxides, Crystals, Erbium, Ytterbium, Scandium, Doping, Solid state lasers, Absorption

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Proceedings Article | 13 March 2008 Paper

Iron doped CdxMn1-xTe crystals: new gain media for mid-IR room temperature lasers

W. Mallory, V. Fedorov, S. Mirov, U. Hömmerich, W. Palosz, S. Trivedi

Proceedings Volume 6871, 68712T (2008) https://doi.org/10.1117/12.764236

KEYWORDS: Luminescence, Crystals, Absorption, Iron, Temperature metrology, Mid-IR, Laser crystals, Sensors, Crystallography, Transition metals

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Proceedings Article | 28 February 2006 Paper

Development of solid-state ceramic laser material using Nd:yttria

Narasimha Prasad, Sudhir Trivedi, Susan Kutcher, Chen-Chia Wang, G. Jagannathan, Uwe Hommerich, Vijay Shukla, Rajendra Sadangi, Bernard Kear

Proceedings Volume 6100, 610012 (2006) https://doi.org/10.1117/12.657763

KEYWORDS: Ceramics, Neodymium, Crystals, Laser crystals, Solid state lasers, Annealing, Materials processing, Laser development, Plasma, Doping

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Proceedings Article | 28 February 2006 Paper

Mid-infrared (3-5 μm) emission from rare earth doped KPb₂Br₅

U. Hömmerich, Ei Ei Nyein, P. Amedzake, S. Trivedi, J. Zavada

Proceedings Volume 6100, 61000G (2006) https://doi.org/10.1117/12.643918

KEYWORDS: Dysprosium, Absorption, Neodymium, Erbium, Crystals, Fluorine, Phonons, Solid state lasers, Bromine, Laser applications

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Proceedings Article | 28 February 2006 Paper

Spectroscopy and frequency upconversion in KPb₂Br₅:Nd³⁺ crystal

R. Balda, U. Hömmerich, Ei Ei Nyein, M. A. Arriandiaga, J. Fernández

Proceedings Volume 6116, 61160D (2006) https://doi.org/10.1117/12.644137

KEYWORDS: Upconversion, Neodymium, Ions, Crystals, Absorption, Luminescence, Infrared radiation, Bromine, Phonons, Visible radiation

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Proceedings Article | 13 September 2005 Paper

Development of solid state laser material using ceramic yttria

Narasimha Prasad, Sudhir Trivedi, Susan Kutcher, Chen-Chia Wang, G. Jagannathan, Uwe Hommerich, Vijay Shukla, Rajendra Sadangi, Bernard Kear

Proceedings Volume 5887, 588717 (2005) https://doi.org/10.1117/12.623912

KEYWORDS: Ceramics, Neodymium, Solid state lasers, Crystals, Laser crystals, Laser development, Diode pumped solid state lasers, Plasma, Doping, Disk lasers

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Proceedings Article | 13 April 2000 Paper

Effect of impurity concentration on 1.54 um emission from GaN:Er

Cammy Abernathy, Mark Overberg, John Mackenzie, Uwe Hoemmerich, Stephen Pearton, R. Wilson, John Zavada

Proceedings Volume 3942, (2000) https://doi.org/10.1117/12.382882

KEYWORDS: Erbium, Gallium nitride, Carbon, Luminescence, Oxygen, Atomic force microscopy, Scanning electron microscopy, Gallium, Surface roughness, Doping

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Showing 5 of 36 publications

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