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Your search keyword '"Fredricksen, C. J."' showing total 29 results
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29 results on '"Fredricksen, C. J."'

4. Injection-seeded internal-reflection-mode p-Ge laser exceeds 10 W peak terahertz power.

Author

Muravjov, A. V., Saxena, H., Peale, R. E., Fredricksen, C. J., Edwards, O., and Shastin, V. N.

Subjects
INDUSTRIAL lasers, LASER ablation, SEMICONDUCTORS, OPTOELECTRONIC devices, TOTAL internal reflection (Optics)
Abstract

Injection seeding of a large active p-Ge laser crystal operating on total internal reflection modes is demonstrated with peak output power at the level of 40 W in the 1.5–4.2 THz spectral range. The improvement over traditional 1 W axial mode p-Ge lasers is due both to spatially and temporally more efficient use of the available population inversion. [ABSTRACT FROM AUTHOR]

Published
2008
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8. Plasmonic enhancement of thin-film solar cells using gold-black coatings

Author

Fredricksen, C. J., primary, Panjwani, D. R., additional, Arnold, J. P., additional, Figueiredo, P. N., additional, Rezaie, F. K., additional, Colwell, J., additional, Baillie, K., additional, Peppernick, S. J., additional, Joly, A. G., additional, Beck, K. M., additional, Hess, W. P., additional, and Peale, R. E., additional

Published
2011
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16. Terahertz spectroscopy of acetone vapor

Author

Peale, R. E., primary, Muravjov, A. V., additional, Cleary, J. W., additional, Brusentsova, T., additional, Fredricksen, C. J., additional, Boreman, G. D., additional, Vaks, V. L., additional, Maslovsky, A. V., additional, and Nikifirov, S. D., additional

Published
2007
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18. Compact tunable p-Ge laser

Author

Du Bosq, T. W., primary, Muravjov, A. V., additional, Park, Kijun, additional, Mathis, C., additional, Mahaney, T. J., additional, Dolguikh, M. V., additional, Peale, R. E., additional, and Fredricksen, C. J., additional

Published
2005
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19. Neutron transmutation doped far-infrared p-Ge laser

Author

Nelson, E. W., primary, Dolguikh, M. V., additional, Muravjov, A. V., additional, Flitsiyan, E. S., additional, Du Bosq, T. W., additional, Peale, R. E., additional, Kleckley, S. H., additional, Fredricksen, C. J., additional, and Vernetson, W. G., additional

Published
2004
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23. Evidence for self-mode-locking in p-Ge laser emission

Author

Muravjov, A. V., primary, Strijbos, R. C., additional, Fredricksen, C. J., additional, Weidner, H., additional, Trimble, W., additional, Withers, S. H., additional, Pavlov, S. G., additional, Shastin, V. N., additional, and Peale, R. E., additional

Published
1998
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26. Radiation damage and mitigation by minority carrier injection in GaSb/InAs and InAsSb/AlAsSb heterojunction barrier infrared detectors

Author

Andresen, Bjørn F., Fulop, Gabor F., Zheng, Lucy, Kimata, Masafumi, Miller, John Lester, Kim, Young-Ho, Fredricksen, C. J., Peale, R. E., Dhakal, N., Barrett, C. L., Boykin, T. O., Maukonen, D., Davis, L., Ferrari, B., Chernyak, L., Zeidan, O. A., Hawkins, S. D., Klem, J. F., Krishna, Sanjay, Kazemi, Alireza, and Schuler-Sandy, Ted

Published
2022
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28. Plasmonic enhancement of thin-film solar cells using gold-black coatings

Author

Fredricksen, C. J., Panjwani, D. R., Arnold, J. P., Figueiredo, P. N., Rezaie, F. K., Colwell, J., Baillie, K., Peppernick, S. J., Joly, A. G., Beck, K. M., Hess, W. P., and Peale, R. E.

Abstract

Coatings of conducting gold-black nano-structures on commercial thin-film amorphous-silicon solar cells enhance the short-circuit current by 20% over a broad spectrum from 400 to 800 nm wavelength. The efficiency, i.e. the ratio of the maximum electrical output power to the incident solar power, is found to increase 7% for initial un-optimized coatings. Metal blacks are produced cheaply and quickly in a low-vacuum process requiring no lithographic patterning. The inherently broad particle-size distribution is responsible for the broad spectrum enhancement in comparison to what has been reported for mono-disperse lithographically deposited or self-assembled metal nano-particles. Photoemission electron microscopy reveals the spatial-spectral distribution of hot-spots for plasmon resonances, where scattering of normally-incident solar flux into the plane increases the effective optical path in the thin film to enhance light harvesting. Efficiency enhancement is correlated with percent coverage and particle size distribution, which are determined from histogram and wavelet analysis of scanning electron microscopy images. Electrodynamic simulations reveal how the gold-black particles scatter the radiation and locally enhance the field strength.

Published
2011
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29. Planar integrated plasmonic mid-IR spectrometer

Author

Figuierdo, P., Nath, J., Medhi, G., Muraviev, A., Fredricksen, C. J., Buchwald, W. R., Cleary, J. W., and Peale, R. E.

Abstract

Mid-IR spectrometers with adequate resolution for chemical sensing and identification are typically large, heavy, and require sophisticated non-stationary optical components. Such spectrometers are limited to laboratory settings. We propose an alternative based on semiconductor micro-fabrication techniques. The device consists of several enabling parts: a compact broad-band IR source, photonic waveguides, a photon-to-surface-plasmon transformer, a surfaceplasmon sample-interaction region, and an array of silicon ring-resonators and detectors to analyze the spectrum. Design considerations and lessons learned from initial experiments are presented.

Published
2011
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