Dr. Roland Himmelhuber Profile

Dr. Roland Himmelhuber

at Wyant College of Optical Sciences

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Author

Publications (6)

Proceedings Article | 19 April 2017 Presentation

Subpicometer thermal shifts in silicon photonic micro-ring resonators with sol-gel claddings (Conference Presentation)

Soha Namnabat, Kyung-Jo Kim, Adam Jones, Roland Himmelhuber, Christopher DeRose, Andrew Pomerene, Tony Lentine, Robert Norwood

Proceedings Volume 10106, 101061E (2017) https://doi.org/10.1117/12.2251920

KEYWORDS: Thermography, Resonators, Silicon photonics, Sol-gels, Silicon, Cladding, Thermal optics, Silica, Polymers, Microrings

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Proceedings Article | 8 March 2014 Paper

Silicon/electro-optic polymer hybrid directional coupler switch

Oscar Herrera, Roland Himmelhuber, Kyung-Jo Kim, Robert Norwood, Nasser Peyghambarian

Proceedings Volume 8991, 89910Q (2014) https://doi.org/10.1117/12.2040068

KEYWORDS: Waveguides, Electrodes, Polymers, Silicon, Directional couplers, Polymer multimode waveguides, Electro optic polymers, Switches, Switching, Refractive index

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Proceedings Article | 18 August 2010 Paper

Mach-Zehnder interferometry method for decoupling electro-optic and piezoelectric tensor components in poled polymer films

Charles Greenlee, Anael Guilmo, Ayodeji Opadeyi, Roland Himmelhuber, Robert Norwood, Mahmoud Fallahi, Jingdong Luo, Su Huang, Xing-Hua Zhou, Alex K.-Y. Jen, Nasser Peyghambarian

Proceedings Volume 7774, 77740D (2010) https://doi.org/10.1117/12.862509

KEYWORDS: Polymers, Modulation, Gold, Ellipsometry, Interferometry, Electro optics, Electroactive polymers, Glasses, Reflection, Interferometers

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Proceedings Article | 21 August 2009 Paper

Dielectric and electrical properties of sol-gel/DNA blends

R. Norwood, C. DeRose, R. Himmelhuber, N. Peyghambarian, J. Wang, L. Li, F. Ouchen, J. Grote

Proceedings Volume 7403, 74030A (2009) https://doi.org/10.1117/12.830978

KEYWORDS: Dielectrics, Sol-gels, Capacitors, Thin films, Polymers, Dielectric breakdown, Temperature metrology, Polymer thin films, Capacitance, Glasses

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Proceedings Article | 2 September 2008 Paper

UV-patternable inorganic-organic hybrid materials tailored for use in electro-optic modulators

Roland Himmelhuber, Christopher DeRose, Robert Norwood, Nasser Peyghambarian

Proceedings Volume 7049, 70490G (2008) https://doi.org/10.1117/12.797544

KEYWORDS: Sol-gels, Waveguides, Refractive index, Polymers, Liquids, Silicon, Cladding, Water, Absorption, Zirconium

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Proceedings Article | 9 February 2007 Paper

Innovative materials tailored for advanced microoptic applications

Roland Himmelhuber, Marion Fink, Karl Pfeiffer, Ute Ostrzinski, Anna Klukowska, Gabi Gruetzner, Ruth Houbertz, Herbert Wolter

Proceedings Volume 6478, 64780E (2007) https://doi.org/10.1117/12.715056

KEYWORDS: Ultraviolet radiation, Transparency, Waveguides, Polymers, Visible radiation, Coating, Micro optics, Optical properties, Epoxies, Manufacturing

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The handling of a continuously increasing amount of data leads to a strong need for high-speed short-range connections. Conventional Cu technology between chips on a board is limited. Optical interconnects will dominate the market, since they can overcome the limitations. One of the issues for materials used, e.g., for waveguides embedded in printed circuit boards (PCBs) is the compatibility with standard epoxies used for PCBs during the entire board fabrication process. Materials applied for optical interconnects should be mechanically and optically reliable, and also allow low-cost production. From the material production side, the process should be easy to up-scale. Therefore, anticipatory research strategy and suitable tailoring is asked for. The handling of light in the UV and visible range often requires the use of specially designed materials. Most polymer materials show an increased yellowing effect upon being exposed to shorter wavelength light. The major influence on the absorption in the UV and visible range of a UV curable material is related to the UV initiator, beside any other chromophores formed mainly during the exposure. Different material approaches will be presented which fulfil the requirements for highly sophisticated applications in optics / optical packaging technology. Firstly, an epoxy-based material system for optical chip-to-chip interconnection will be introduced. Secondly, the adaptation of a UV patternable inorganic-organic hybrid material (ORMOCER^®) originally developed for waveguide applications in the data and telecom regime, will be discussed with respect to applications in the visible regime. Spectroscopy and UV-DSC measurements were carried out to investigate the influence of standard photoinitiators on the optical properties for an ORMOCER^® system suitable for microoptic applications. The results show that the resulting material properties were significantly improved by exchange of the initiators compared to the originally incorporated one.

Showing 5 of 6 publications

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