H. W. Seo, L. W. Tu, Q. Y. Chen, C. Y. Ho, Y. T. Lin et al.
A III-nitride-based photogated transistor using photons to control the channel width of an otherwise gateless field effect transistor (FET) is investigated. This is accomplished by stacking sequential layers of p-GaN/InGaN/n-GaN on a Si substrate in an array of nanorods. The nitride p-i-n diode can … [Appl. Phys. Lett. 96, 101114 (2010)] published Thu Mar 11, 2010.
J. Bravo-Abad, A. W. Rodriguez, J. D. Joannopoulos, P. T. Rakich, S. G. Johnson et al.
In this letter, we show theoretically how the light-confining properties of triply-resonant photonic resonators can be tailored to enable dramatic enhancements of the conversion efficiency of terahertz (THz) generation via nonlinear frequency down-conversion processes. Using detailed numerical calcu … [Appl. Phys. Lett. 96, 101110 (2010)] published Wed Mar 10, 2010.
Xiaoyu Miao, Brandon Passmore, Aaron Gin, William Langston, Shivashankar Vangala et al.
We demonstrate metamaterials at the mid-infrared (mid-IR) wavelengths (812 [mu]m) that can be widely tuned by doping in adjacent semiconductor epilayers. The metamaterials are based on metallic split ring resonators (SRRs) fabricated on doped indium antimonide (InSb). Finite integral time-domain si … [Appl. Phys. Lett. 96, 101111 (2010)] published Wed Mar 10, 2010.
G. Tabares, A. Hierro, J. M. Ulloa, A. Guzman, E. Munoz et al.
Schottky photodiodes based on Au-ZnMgO/sapphire are demonstrated covering the spectral region from 3.35 to 3.48 eV, with UV/VIS rejection ratios up to ~10 and responsivities as high as 185 A/W. Both the rejection ratio and the responsivity are shown to be largely enhanced by the presence of an inter … [Appl. Phys. Lett. 96, 101112 (2010)] published Wed Mar 10, 2010.
K. Kalantar-zadeh, K. Khoshmanesh, A. A. Kayani, S. Nahavandi, and A. Mitchell
We present a tuneable optical waveguide using dielectrophoretically controlled nanoparticles in microfluidics. Silicon dioxide nanoparticles of different sizes in de-ionized water are channelled through a microfluidic system. An array of microelectrodes generates the dielectrophoretic force to funne … [Appl. Phys. Lett. 96, 101108 (2010)] published Wed Mar 10, 2010.
H. C. Jeon, S. H. Park, S. J. Lee, T. W. Kang, and T. F. George
Electronic, optical, and electrical properties of CdZnO/MgZnO quantum well (QW) structures, considering internal field and polarization effect, are investigated by using many-body theory. The CdZnO/MgZnO QW structure with higher Cd composition, which has deeper and stronger confinement, is found to … [Appl. Phys. Lett. 96, 101113 (2010)] published Wed Mar 10, 2010.
Chi-Sen Lee, Wei Guo, Debashish Basu, and Pallab Bhattacharya
A high-speed multiwavelength quantum dot comb laser, grown by molecular beam epitaxy, is demonstrated. The device is characterized with a 75.9 nm (full width at half maximum) and a 91.4 nm (Delta) wide lasing spectrum. There are 105 and 185 simultaneously emitted longitudinal modes with a maximum ch … [Appl. Phys. Lett. 96, 101107 (2010)] published Wed Mar 10, 2010.
Jiaming Hao, Wei Yan, and Min Qiu
A zero index metamaterial (ZIM) can be utilized to block wave (super-reflection) or conceal objects completely (cloaking). The super-reflection device can be realized by a Mu zero (Epsilon zero) metamaterial with a perfect electric (magnetic) conductor inclusion of arbitrary shape and size for a tra … [Appl. Phys. Lett. 96, 101109 (2010)] published Wed Mar 10, 2010.
Tsung-Yu Kao, Qing Hu, and John L. Reno
We report the demonstration of phase-locked arrays of surface-emitting distributed-feedback (DFB) terahertz quantum-cascade lasers with single-mode operations. Carefully designed phase sector locks several surface-emitting DFB laser ridges in-phase, creating tighter beam-patterns along the phased-ar … [Appl. Phys. Lett. 96, 101106 (2010)] published Wed Mar 10, 2010.
As Celestron turns 50 this year, the leading telescope manufacturer remembers its accomplishments and looks forward to the future.