T. Sunner, T. Stichel, S.-H. Kwon, T. W. Schlereth, S. Hofling et al.
We have studied the response of a photonic crystal cavity to changes of the ambient refractive index. Transmission measurements of the cavity under different gaseous environments and pressures showed a linear dependence of the resonance wavelength on the refractive index of the ambient gas. A change … [Appl. Phys. Lett. 92, 261112 (2008)] published Wed Jul 2, 2008.
Seungmoo Yang and Vasily N. Astratov
By using spatially resolved spectroscopy the authors demonstrate that the periodical focusing of light in straight chains of touching 5 [mu]m polystyrene microspheres is characterized with the periodicity of photonic nanojets corresponding to the size of two spheres. In transmission spectra of long … [Appl. Phys. Lett. 92, 261111 (2008)] published Wed Jul 2, 2008.
M. Boberl, M. V. Kovalenko, G. Pillwein, G. Brunthaler, and W. Heiss
Colloidal quantum dots absorbing in the infrared are filled into nanoporous alumina membranes to form narrow columns with aspect ratios of 300:1. The columns define the charge carrier path vertical through the ordered pore structure of the membrane. Electrical transport and photocurrent of various q … [Appl. Phys. Lett. 92, 261113 (2008)] published Wed Jul 2, 2008.
Jun Yang, Junseok Heo, Ting Zhu, Jian Xu, Juraj Topolancik et al.
The experimental observation of enhanced photoluminescence from high-Q silicon-based random photonic crystal microcavities embedded with PbSe colloidal quantum dots is being reported. The emission is optically excited at room temperature by a continuous-wave Ti-sapphire laser and exhibits randomly d … [Appl. Phys. Lett. 92, 261110 (2008)] published Wed Jul 2, 2008.
Ashwin K. Iyer and George V. Eleftheriades
This work proposes a three-dimensional isotropic transmission-line metamaterial topology for free-space excitation whose negative-refractive-index properties are validated by full-wave simulation. The topology is based on a physical realization of the symmetrical condensed node of transmission-line … [Appl. Phys. Lett. 92, 261106 (2008)] published Tue Jul 1, 2008.
Chun-Yu Lee, Yuen-Yung Hui, Wei-Fang Su, and Ching-Fuh Lin
We report ultraviolet electroluminescence from ZnO nanoparticle-based devices prepared by the dry-coating technique. With dry-coating process, the structure of the ZnO nanoparticle monolayer (90 nm) in the device can be easily achieved. The method reduces the density of pinhole defects in the ZnO n … [Appl. Phys. Lett. 92, 261107 (2008)] published Tue Jul 1, 2008.
Garrett D. Cole, Simon Groblacher, Katharina Gugler, Sylvain Gigan, and Markus Aspelmeyer
We present high-performance megahertz micromechanical oscillators based on freestanding epitaxial AlGaAs distributed Bragg reflectors. Compared with dielectric reflectors, the low mechanical loss of the monocrystalline heterostructure gives rise to significant improvements in the achievable mechanic … [Appl. Phys. Lett. 92, 261108 (2008)] published Tue Jul 1, 2008.
B. S. Li, A. Shen, W. O. Charles, Q. Zhang, and M. C. Tamargo
The authors report the observation of midinfrared intersubband (ISB) absorption in MgSe/ZnCdSe multiple quantum wells (MQWs) grown on (001) InP substrates by molecular beam epitaxy. The in situ reflection high energy electron diffraction shows that zincblende MgSe/ZnCdSe MQWs can be grown with the i … [Appl. Phys. Lett. 92, 261104 (2008)] published Tue Jul 1, 2008.
A unique stellar system has passed the general theory of relativity.
Another soil sample could be completely delivered to the lander’s spacecraft laboratory as early as Sunday.