Zobrazeno 1 - 10
of 23
pro vyhledávání: '"S. W. Leonard"'
Autor:
Albert Birner, Ulrich Gösele, Frank Müller, Vahid Sandoghdar, H. M. van Driel, Jörg Schilling, F. Genereux, Kurt Busch, Ralf B. Wehrspohn, Reinald Hillebrand, S. W. Leonard, J. P. Mondia, P. Kramper
Publikováno v:
Journal of Optics A: Pure and Applied Optics. 3:S121-S132
A review of the optical properties of two-dimensional and three-dimensional photonic crystals based on macroporous silicon is given. As macroporous silicon provides structures with aspect ratios exceeding 100, it can be considered to be an ideal two-
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dd5ea219dd57537eeb513a5955248225
https://doi.org/10.1088/1464-4258/3/6/362
https://doi.org/10.1088/1464-4258/3/6/362
Autor:
Frank Müller, A. Birner, Jörg Schilling, H. M. van Driel, Ralf B. Wehrspohn, Ulrich Gösele, S. W. Leonard, Kurt Busch, Reinald Hillebrand, Sajeev John
Publikováno v:
Optical Materials. 17:7-10
Transmission measurements were performed on thin 2D silicon photonic crystals (PCs) with 1–4 crystal rows in order to investigate the effect of a finite structure and to obtain an estimate of the crystal thickness necessary to minimize crosstalk be
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5f6229672e1520c098fe641df296b218
https://doi.org/10.1016/s0925-3467(01)00012-x
https://doi.org/10.1016/s0925-3467(01)00012-x
Autor:
Ulrich Gösele, Sajeev John, S. W. Leonard, H. M. van Driel, Ovidiu Toader, Kurt Busch, Volker Dr. Lehmann, A. Birner, J. P. Mondia
Publikováno v:
Physical Review B. 61:R2389-R2392
The photonic band gap of a two-dimensional photonic crystal is continuously tuned using the temperature dependent refractive index of a liquid crystal. Liquid crystal $E7$ was infiltrated into the air pores of a macroporous silicon photonic crystal w
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fa7826e50422f5d2ca5375bcc0026846
https://doi.org/10.1103/physrevb.61.r2389
https://doi.org/10.1103/physrevb.61.r2389
Autor:
S. W. Leonard
Publikováno v:
Applied Physics Letters. 81:2917-2919
The prospect of obtaining a complete three-dimensional band gap in macroporous silicon photonic crystals is investigated theoretically. Band structure calculations indicate that a modified form of the simple cubic lattice of air spheres in silicon ex
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e89a50dade262263a60b760cd04c4da4
https://doi.org/10.1063/1.1513183
https://doi.org/10.1063/1.1513183
Autor:
S. W. Leonard
Publikováno v:
Journal of Microscopy. 172:89-92
Summary A variable-depth electropolishing technique has been developed for transmission electron microscopy samples using copper as sample material. This was required for an experiment concerning the measurement of the variation of dislocation densit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::53f189c8da94493c5e9429451ef84ba4
https://doi.org/10.1111/j.1365-2818.1993.tb03397.x
https://doi.org/10.1111/j.1365-2818.1993.tb03397.x
Publikováno v:
Applied Physics Letters. 77:2882-2884
Femtosecond time-resolved reflectivity was measured near the 1.55 μm absorption edge of several GaAsxSb1−x/AlSb quantum well samples. On the basis of differences in the reflectivity recovery kinetics and plateau values, we deduce that Γ–L inter
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::85437c3afc603913d01a7a5b7bbd6dce
https://doi.org/10.1063/1.1322368
https://doi.org/10.1063/1.1322368
Publikováno v:
Applied Physics Letters. 75:3665-3667
Spin relaxation times in GaAsxSb1−x quantum wells are measured at 295 K using time-resolved circular dichroism induced by 1.5 μm, 100 fs pulses. Values of 1.03 and 0.84 ps are obtained for samples with x=0 and 0.188, respectively. These times are
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3292db8fffd8038673702e775a2c4fd8
https://doi.org/10.1063/1.125422
https://doi.org/10.1063/1.125422
Publikováno v:
Optics letters. 25(20)
We report the infrared operation of a two-dimensional photonic crystal waveguide fabricated in silicon. Measurements of the transmission spectrum reveal a large transmission bandwidth within the 3.1-5.5-microm bulk-crystal photonic bandgap and a rich
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3936315fa03dbf2fad6aa67436bda5e5
https://pubmed.ncbi.nlm.nih.gov/18066275
https://pubmed.ncbi.nlm.nih.gov/18066275
The aim of this study was to examine the effect of dietary pyrrolizidine (PA) alkaloids (from Senecio) on the plasma and liver vitamin E concentration in broiler chickens. 54 broiler chicks were used in this experiment and were divide into six equal
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8633b8fadce505cd5a69034f0beba2e0
https://doi.org/10.1079/9781845932732.0077
https://doi.org/10.1079/9781845932732.0077
Autor:
Cecile Jamois, P. Kramper, Jörg Schilling, Vahid Sandoghdar, Ralf B. Wehrspohn, Mario Agio, T. Geppert, H. M. van Driel, Frank Müller, Ulrich Gösele, Ortwin Hess, S. W. Leonard, Christian Hermann, Lucio Claudio Andreani
Publikováno v:
2003 Conference on Lasers and Electro-Optics Europe (CLEO/Europe 2003) (IEEE Cat. No.03TH8666).
Passive optical components based on high-index materials like silicon are becoming increasingly attractive because they allow dense integration. Photonic crystal waveguides support modes due to Bragg reflections as well as modes due to total internal
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f5c61a986e71318b144a2309cdf3808c
https://doi.org/10.1109/cleoe.2003.1313718
https://doi.org/10.1109/cleoe.2003.1313718