Zobrazeno 1 - 10
of 73
pro vyhledávání: '"Pierre Wiltzius"'
Publikováno v:
Advanced Materials. 24:2863-2868
The optical properties of a photonic crystal (PC) are governed by the periodicity of its lattice, geometry of its basis, and dielectric contrast of its constituents. Numerous advances in experimental fabrication and characterization of three-dimensio
Autor:
Daniel Shir, John A. Rogers, Andrew Brzezinski, Debashis Chanda, Erik C. Nelson, Pierre Wiltzius, Paul V. Braun
Publikováno v:
Journal of Vacuum Science & Technology B, Nanotechnology and Microelectronics: Materials, Processing, Measurement, and Phenomena. 28:783-788
The authors describe the fabrication and characterization of three dimensional silicon inverse woodpile photonic crystals. A dual exposure, two-photon, conformal phasemask technique is used to create high quality polymer woodpile structures over larg
Publikováno v:
Advanced Materials. 21:3012-3015
2009 WILEY-VCH Verlag Gmb Considerable research has been carried out on photonic crystals since the concept was introduced in 1987. However, fabrication of high-quality 3D photonic crystals still remains a challenge. Among a wide range of proposed te
Autor:
Robert Barry, Ralph G. Nuzzo, Jennifer N. Hanson, Pierre Wiltzius, Jennifer A. Lewis, Robert F. Shepherd
Publikováno v:
Advanced Materials. 21:2407-2410
The ability to pattern soft materials at the microscale is critical for several emerging technologies, including tissue-engineering scaffolds, photonic crystals, sensors, and self-healing materials. Hydrogels are an important class of soft materials
Publikováno v:
Langmuir. 20:7045-7052
We have directly observed the structural evolution of colloidal crystals as a function of increasing ionic strength using confocal scanning laser microscopy. Silica colloids were sedimented onto a glass substrate in deionized water to create large, s
Autor:
Pierre Wiltzius, David A. Weitz, P. Mach, Arjun G. Yodh, Tom C. Lubensky, M. Megens, Keng-Hui Lin
Publikováno v:
Europhysics Letters (EPL). 58:679-685
We have incorporated nematic liquid crystal into periodic, polymer host structures templated from self-assembled colloids. Using these composite materials, we demonstrate the first electrically switchable three-dimensional Bragg diffraction. The swit
Autor:
Paul V. Braun, Pierre Wiltzius
Publikováno v:
Current Opinion in Colloid & Interface Science. 7:116-123
Colloidal crystallization has been explored for several years as a fabrication method for photonic crystals. While macroporous materials grown with silica or polymer colloids might exhibit pleasing opalescence, truly novel photonic behavior such as p
Autor:
Christopher A. White, C. Kloc, R. W. Zehner, Paul V. Braun, M. K. Weldon, S. S. Patel, Pierre Wiltzius
Publikováno v:
Europhysics Letters (EPL). 56:207-213
Spectroscopy was performed along three distinct crystallographic axes of a high refractive index contrast photonic crystal and the spectra were compared with theoretical calculations. Deep dips were observed in the experimental spectra at 2.1 and 3.2
Autor:
Albert Polman, Pierre Wiltzius
Publikováno v:
MRS Bulletin. 26:608-613
The electronics revolution of the past 50 years has its roots in two scientific and technological areas. On the one hand, there have been tremendous advancements in our understanding of the physics of metals, dielectrics, and semiconductors, leading
Autor:
C. Kloc, R. W. Zehner, S. S. Patel, Christopher A. White, M. K. Weldon, Pierre Wiltzius, Paul V. Braun
Publikováno v:
Advanced Materials. 13:721-724