Mr. Mark H. Bergen Profile

Mark H. Bergen

Masters Student

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Author

Publications (5)

Proceedings Article | 16 February 2018 Presentation + Paper

A smart solar energy collecting device

Timothy Westgate, Adrian Boivin, Jonathan Holzman, Blake W. Veerman, Mark Bergen, Xian Jin, Brandon Born, Mike Bernier

Proceedings Volume 10527, 105270I (2018) https://doi.org/10.1117/12.2290569

KEYWORDS: Solar cells, Silicon, Reflection, Solar energy, Silicon solar cells, Antireflective coatings, Photovoltaics, Sun, Reflectivity, Geometrical optics

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Proceedings Article | 16 March 2016 Paper

Design and optimization of indoor optical wireless positioning systems

Mark Bergen, Daniel Guerrero, Xian Jin, Blago Hristovski, Hugo Chaves, Richard Klukas, Jonathan Holzman

Proceedings Volume 9754, 97540A (2016) https://doi.org/10.1117/12.2208722

KEYWORDS: Receivers, Imaging systems, Geometrical optics, Transmitters, Photonic devices, Microlens, Optical navigation, Image sensors, Error analysis, Modulation, Integrated optics, Radio optics, Global Positioning System, Received signal strength, Light emitting diodes

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Proceedings Article | 25 February 2016 Paper

Textured semiconductors for enhanced photoconductive terahertz emission

Christopher Collier, Jeffrey D. Krupa, Ilija Hristovski, Trevor Stirling, Mark Bergen, Jonathan Holzman

Proceedings Volume 9747, 97470M (2016) https://doi.org/10.1117/12.2208548

KEYWORDS: Semiconductors, Terahertz radiation, Antennas, Picosecond phenomena, Electro optics, Millimeter wave sensors, Indium, Semiconductor materials, Image analysis, Scanning electron microscopy, Ultrafast phenomena, Surface finishing, Laser beam diagnostics, Polishing

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Proceedings Article | 8 May 2014 Paper

Retroreflective imaging systems for enhanced optical biosensing

Mark Bergen, Jacqueline Nichols, Christopher Collier, Xian Jin, Jonathan Holzman

Proceedings Volume 9129, 912914 (2014) https://doi.org/10.1117/12.2052523

KEYWORDS: Retroreflectors, Optical spheres, Imaging systems, Microorganisms, Collimation, Refractive index, Biosensing, Spherical lenses, Image sensors, Glasses

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Biosensing is important for detection and characterization of microorganisms. When the detection and characterization of targeted microorganisms require micron-scale resolutions, optical biosensing techniques are especially beneficial. Optical biosensing can be applied through direct or indirect optical sensing techniques. The latter have demonstrated especially high sensitivities for the detection of targeted microorganisms with labeling. Unfortunately, such systems rely on high-resolution microscopy with microscopic sampling areas to image the labeled target microorganisms. This leads to long characterization times for applications such as pathogen detection in water quality monitoring where users must scan the micron-scale sampling areas across millimeter- or even centimeter-scale samples. This work introduces retroreflector labels for the detection and characterization of microorganisms for macroscopic sample sizes. The demonstrated retroreflective imaging system uses a laser source to illuminate the sample, in lieu of the fluorescent excitation source, and micron-scale retroreflector labels, in lieu of fluorescent stains/proteins. Antibodies are used to bind retroreflectors to targeted microorganisms. The presence of these microscopic retroreflector-microorganism pairs is monitored in a retroreflected image that is captured by a distant image sensor which shows a well-localized retroreflected beamspot for each pair. Characteristics of an appropriately-designed retroreflective imaging system which provide a quantifiable record of microorganism-coupled retroreflectors across macroscopic sample sizes are presented. Retroreflection directionality, collimation, and contrast are investigated for both corner-cube retroreflectors and spherical retroreflectors (of varying refractive indices). It is ultimately found that such a system is an effective tool for the detection and characterization of microorganism targets, down to a single-target detection limit.

Proceedings Article | 24 September 2013 Paper

Transient mobility and photoconductive terahertz emission with GaP

Christopher Collier, Brandon Born, Xian Jin, Timothy Westgate, Max Bethune-Waddell, Mark Bergen, Jonathan Holzman

Proceedings Volume 8846, 884616 (2013) https://doi.org/10.1117/12.2023764

KEYWORDS: Terahertz radiation, Gallium arsenide, Electrons, Picosecond phenomena, Scattering, Plasma, Semiconductors, Ultrafast phenomena, Surface finishing, Near field

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