Search Results - "Ulu, G."

Dentin permeability of carious primary teeth by Ulu Güzel, K, Kirzioğlu, Z, Özkorucuklu, S

“…Background: Many in vitro studies have used dentine permeability to evaluate the efficacy of various restorative and preventative procedures. The easiest way…”
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Cross-polarization generation and its impact on coupler performance by Tairan Wang, Khan, M.J., Viens, J., Lim, M., Fried, D., Foresi, J., Ulu, G., Agarwal, A.

“…In high index contrast integrated optic waveguides, it has been found that waveguide asymmetries can produce cross-polarization coupling. This effect has been…”
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High-speed high-efficiency large-area resonant cavity enhanced p-i-n photodiodes for multimode fiber communications by Gokkavas, M., Dosunmu, O., Unlu, M.S., Ulu, G., Mirin, R.P., Christensen, D.H., Ozbay, E.

“…We report AlGaAs-GaAs p-i-n photodiodes with a 3-dB bandwidth in excess of 10 GHz for devices as large as 60-μm diameter. Resonant cavity enhanced…”
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Characterization of etched facets for GaN-based lasers by Scherer, M., Schwegler, V., Seyboth, M., Eberhard, F., Kirchner, C., Kamp, M., Ulu, G., Ünlü, M.S., Gruhler, R., Hollricher, O.

“…Dry-etching of laser facets is commonly used for (InAl)GaN/sapphire-based structures since the epitaxial planes of the nitride layers are rotated with respect…”
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GaN-based lasers on SiC: influence of mirror reflectivity on L–I characteristics by Schwegler, V., Schad, S.S., Scherer, M., Kamp, M., Ulu, G., Emsley, M., Ünlü, M.S., Lell, A., Bader, S., Hahn, B., Lugauer, H.J., Kühn, F., Weimar, A., Härle, V.

“…The influence of the mirror reflectivity on the L–I characteristics of GaN-based lasers has been studied. A cleaved, Al-coated fiber is used as an external…”
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Resonant cavity enhanced photodiodes with a broadened spectral peak by Gokkavas, M., Ulu, G., Dosunmu, O., Mirin, R.P., Unlu, M.S.

“…We have designed, fabricated, and characterized a novel RCE PD that exhibits a wider and flatter peak quantum efficiency when compared with a standard RCE PD…”
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High-speed >90% quantum-efficiency p–i–n photodiodes with a resonance wavelength adjustable in the 795–835 nm range by Özbay, Ekmel, Kimukin, Ïbrahim, Biyikli, Necmi, Aytür, Orhan, Gökkavas, Mutlu, Ulu, Gökhan, Ünlü, M. Selim, Mirin, Richard P., Bertness, Kris A., Christensen, David H.

“…We report GaAs/AlGaAs-based high-speed, high-efficiency, resonant cavity enhanced p–i–n photodiodes. The devices were fabricated by using a…”
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Direct measurement of pump intensity distributions in an optically pumped vertical-cavity surface-emitting laser by Vander Rhodes, G.H., Pomeroy, J.M., Ulu, G., Unlu, M.S., Goldberg, B.B.

“…In conclusion, we have demonstrated the direct mapping of the internal pump intensity distribution of an optically pumped AlGaAs QW VCSEL laser structure. The…”
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The relationship of amelogenesis imperfecta and nephrocalcinosis syndrome by Kirzioglu, Zuhal, Ulu, K Gorkem, Sezer, M Tugrul, Yüksel, Seref

“…To analyze the prevalence and associated oral findings of nephrocalcinosis in a group of patients affected with amelogenesis imperfecta (AI). The relationship…”
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Photogenerated carrier dynamics in GaN by Benea, G.E., Ulu, G., Unlu, M.S., Goldberg, B.B., Molnar, R.J.

“…Summary form only given.A clear understanding of recombination mechanisms is crucial to optimize GaN based III-V semiconductors for optoelectronic devices,…”
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High-speed high-efficiency photodetectors for short pulse applications by Selim Unlu, M., Gokkavas, M., Ulu, G., Mirin, R.P., Christensen, D.H.

“…Resonant cavity enhanced (RCE) photodetectors are promising candidates for applications where high-speed high-efficiency photodetection is desirable. In RCE…”
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High-speed widely-tunable >90% quantum-efficiency resonant cavity enhanced p-i-n photodiodes by Biyikli, N., Kimukin, I., Aytur, O., Gokkavas, M., Ulu, G., Mirin, R., Christensen, D.H., Selim Unlu, M., Ozbay, E.

“…We report our work on design, fabrication, and testing of widely tunable high-speed RCE p-i-n photodiodes for operation around 820 nm. The details of the…”
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