Dr. Demetris Geddis Profile

Dr. Demetris Geddis

at Hampton Univ

SPIE Involvement:

Author

Publications (3)

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 | 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 | 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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