Journal of Applied Physics

Journal: Journal of Applied Physics

Abbreviation

J. Appl. Physi.

Publisher

American Institute of Physics

ISSN

0021-8979
1089-7550

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Publications1 - 10 of 316

Dynamics of submicron aerosol droplets in a robust optical trap formed by multiple Bessel beams
Thanopulos, Ioannis; Luckhaus, David; Preston, Thomas C.; et al. (2014)
Journal of Applied Physics
In this paper, we model the three-dimensional escape dynamics of single submicron-sized aerosol droplets in optical multiple Bessel beam traps. Trapping in counter-propagating Bessel beams (CPBBs) is compared with a newly proposed quadruple Bessel beam (QBB) trap, which consists of two perpendicularly arranged CPBB traps. Calculations are performed for perfectly and imperfectly aligned traps. Mie-theory and finite-difference time-domain methods are used to calculate the optical forces. The droplet escape kinetics are obtained from the solution of the Langevin equation using a Verlet algorithm. Provided the traps are perfectly aligned, the calculations indicate very long lifetimes for droplets trapped either in the CPBB or in the QBB trap. However, minor misalignments that are hard to control experimentally already severely diminish the stability of the CPBB trap. By contrast, such minor misalignments hardly affect the extended droplet lifetimes in a QBB trap. The QBB trap is found to be a stable, robust optical trap, which should enable the experimental investigation of submicron droplets with radii down to 100 nm. Optical binding between two droplets and its potential role in preventing coagulation when loading a CPBB trap is briefly addressed.
Quantum transport in two- and three-dimensional nanoscale transistors
Luisier, Mathieu; Schenk, Andreas; Fichtner, Wolfgang (2006)
Journal of Applied Physics
Acoustoelectric effects in very high-mobility p-SiGe/Ge/SiGe heterostructure
Drichko, Irina L.; Diakonov, Andrey M.; Lebedeva, Elena V.; et al. (2009)
Journal of Applied Physics
Measurement results of the acoustoelectric effects [surface acoustic waves (SAW) attenuation and velocity] in a high-mobility 𝑝�-SiGe/Ge/SiGe structure are presented. The structure was low-energy plasma-enhanced chemical vapor deposition grown with a two-dimensional (2D) channel buried in the strained Ge layer. The measurements were performed as a function of temperature (1.5–4.2 K) and magnetic field (up to 8.4 T) at different SAW intensities at frequencies 28 and 87 MHz. Shubnikov–de Haas-like oscillations of both SAW attenuation and the velocity change have been observed. Hole density and mobility, effective mass, quantum and transport relaxation times, as well as the Dingle temperature were measured with a method free of electric contacts. The effect of heating of the 2D hole gas by the electric field of the SAW was investigated. Energy relaxation time 𝜏�𝜀� and the deformation potential constant determined.
Measurements and simulations of the optical gain and anti-reflection coating modal reflectivity in quantum cascade lasers with multiple active region stacks
Bidaux, Yves; Terazzi, Romain; Bismuto, Alfredo; et al. (2015)
Journal of Applied Physics
Spin wave excitations in the antiferromagnetic state of Pr0.5Sr0.5MnO3
Krishnamurthy, V.V.; Robertson, J.L.; Mankey, G.J.; et al. (2004)
Journal of Applied Physics
Ge/SiGe quantum wells on Si(111)
Gatti, E.; Isa, F.; Chrastina, D.; et al. (2014)
Journal of Applied Physics
GaAs/Ge crystals grown on Si substrates patterned down to the micron scale
Taboada, A.G.; Meduňa, M.; Salvalaglio, M.; et al. (2016)
Journal of Applied Physics
Mechanisms of the laser plume expansion during the ablation of LiMn2O4
Canulescu, S.; Papdopoulou, E.L.; Anglos, D.; et al. (2009)
Journal of Applied Physics
Photobleaching and optical properties of organic crystal 4-N, N-dirnethylamino-4 '-N '-methyl stilbazolium tosylate
Mutter, Lukas; Jazbinsek, Mojca; Zgonik, Marko; et al. (2003)
Journal of Applied Physics
Effective g factor of 2D holes in strained Ge quantum wells
Drichko, Irina L.; Dmitriev, Alexandr A.; Malysh, V.A.; et al. (2018)
Journal of Applied Physics

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