Resonantly enhanced optical nonlinearity in hybrid semiconductor quantum dot metal nanoparticle structures
Ming Fu, Kai Wang, Hua Long, Guang Yang, Peixiang Lu et al.
The optical nonlinearity of hybrid structures composed of CdTe quantum dots and periodical particle array of gold is studied using Z-scan method. The optical nonlinearity is dramatically affected by the interaction between exciton in CdTe quantum dots and surface plasmons in Au periodical particle a ... [Appl. Phys. Lett. 100, 063117 (2012)] published Fri Feb 10, 2012.
Fabrication of disconnected three-dimensional silver nanostructures in a polymer matrix
Kevin Vora, SeungYeon Kang, Shobha Shukla, and Eric Mazur
We present a simple, one-step technique for direct-writing of a structured nanocomposite material with disconnected silver nanostructures in a polymer matrix. A nonlinear optical interaction between femtosecond laser pulses and a composite material creates silver structures that are embedded inside ... [Appl. Phys. Lett. 100, 063120 (2012)] published Fri Feb 10, 2012.
Entropy Generation across Earth's Collisionless Bow Shock
G. K. Parks, E. Lee, M. McCarthy, M. Goldstein, S. Y. Fu et al.
Earth's bow shock is a collisionless shock wave but entropy has never been directly measured across it. The plasma experiments on Cluster and Double Star measure 3D plasma distributions upstream and downstream of the bow shock allowing calculation of Boltzmann's entropy function H and his famous H t ... [Phys. Rev. Lett. 108, 061102 ] published .
Faraday waves in binary nonmiscible Bose-Einstein condensates
Antun Balaz and Alexandru I. Nicolin
We show by extensive numerical simulations and analytical variational calculations that elongated binary nonmiscible Bose-Einstein condensates subject to periodic modulations of the radial confinement exhibit a Faraday instability similar to that seen in one-component condensates. Considering the hy ... [Phys. Rev. A 85, 023613 ] published .
Length dependence of the resistance in graphite: Influence of ballistic transport
P. Esquinazi, J. Barzola-Quiquia, S. Dusari, and N. Garcia
Using a linear array of voltage electrodes with a separation of several micrometers on a 20 nm thick and 30 [mu]m long multigraphene sample, we show that the measured resistance does not follow the usual length dependence according to Ohm's law. The deviations can be quantitatively explained taking ... [J. Appl. Phys. 111, 033709 (2012)] published Thu Feb 9, 2012.
Integrability and Conservation Laws for the Nonlinear Evolution Equations of Partially Coherent Waves in Noninstantaneous Kerr Media
T. Hansson, M. Lisak, and D. Anderson
It is shown that the evolution equations describing partially coherent wave propagation in noninstantaneous Kerr media are integrable and have an infinite number of invariants. A recursion relation for generating these invariants is presented, and it is demonstrated how to express them in the cohere ... [Phys. Rev. Lett. 108, 063901 ] published .
Stochastic tipping points in climate dynamics
Stefano Pierini
A crucial question recently raised in climate dynamics concerns abrupt climate transitions: Are they due to a tipping point (TP) being exceeded, or is fast noisy dynamics the cause of their excitation? In this respect, a case study based on a low-order ocean model is developed to show that in an exc ... [Phys. Rev. E 85, 027101 ] published .
An experimental study on a cylindrical microperforated panel space sound absorber
Kimihiro Sakagami, Takayuki Oshitani, Motoki Yairi, Emi Toyoda, and Masayuki Morimoto
A microperforated panel (MPP), which is widely known as one of the most promising alternatives of the next-generation sound absorbers, is typically used with a rigid-back wall with an air-cavity. However, a multiple-leaf MPP space absorber, which does not have any backing structure, double-leaf MPP ... [Noise Control Eng. J. 60, 22 (2012)] published Wed Feb 8, 2012.
Fully kinetic description of the linear excitation and nonlinear saturation of fast-ion-driven geodesic acoustic mode instability
D. Zarzoso, X. Garbet, Y. Sarazin, R. Dumont, and V. Grandgirard
We show in this paper that geodesic acoustic modes (GAMs) can be efficiently excited by a population of fast ions even when Landau damping on thermal ions is accounted for. We report in particular fully kinetic calculations of the GAM dispersion relation and its complete solution. Written under a va ... [Phys. Plasmas 19, 022102 (2012)] published Wed Feb 8, 2012.
Crenelated fast oscillatory outputs of a two-delay electro-optic oscillator
Lionel Weicker, Thomas Erneux, Maxime Jacquot, Yanne Chembo, and Laurent Larger
An electro-optic oscillator subject to two distinct delayed feedbacks has been designed to develop pronounced broadband chaotic output. Its route to chaos starts with regular pulsating gigahertz oscillations that we investigate both experimentally and theoretically. Of particular physical interest a ... [Phys. Rev. E 85, 026206 ] published .
Multivalley spin relaxation in n-type bulk GaAs in the presence of high electric fields
H. Tong and M. W. Wu
Multivalley spin relaxation in n-type bulk GaAs in the presence of high electric field is investigated from the microscopic kinetic spin Bloch equation approach with the Gamma and L valleys included. We show that the spin relaxation time decreases monotonically with the electric field, which differs ... [Phys. Rev. B 85, 075203 ] published .
Fourier-transform photocurrent spectroscopy using a supercontinuum light source
Christian Petermann, Rene Beigang, and Peer Fischer
We demonstrate an implementation of frequency-encoded photocurrent spectroscopy using a super-continuum light source. The spectrally broad light is spatially dispersed and modulated with a special mechanical chopper design that permits a continuous wavelength-dependent modulation. After recombinatio ... [Appl. Phys. Lett. 100, 061108 (2012)] published Tue Feb 7, 2012.
Solitonic solutions of Faddeev model
Chang-Guang Shi and Minoru Hirayama
An application of the equation proposed by the present authors, which is equivalent to the static field equation of the Faddeev model, is discussed. Under some assumptions on the space and on the form of the solution, the field equation is reduced to a nonlinear ordinary differential equation of sec ... [J. Math. Phys. 53, 022301 (2012)] published Tue Feb 7, 2012.
Publisher's Note: Random sequential adsorption of partially oriented linear k-mers on a square lattice [Phys. Rev. E 84, 061603 (2011)]
Nikolai I. Lebovka, Natalia N. Karmazina, Yuri Yu. Tarasevich, and Valeri V. Laptev
Abstract not available. [Phys. Rev. E 85, 029902 ] published .
Transition from unidirectional to delayed bidirectional coupling in optically coupled semiconductor lasers
Cristian Bonatto, Bryan Kelleher, Guillaume Huyet, and Stephen P. Hegarty
We investigate the transition from unidirectional to delayed bidirectional coupling of semiconductor lasers. By tuning the coupling strength in one direction we show how the locking region evolves as a function of the detuning and coupling strength. We consider two representative values of the relax ... [Phys. Rev. E 85, 026205 ] published .
Twinlike models for self-dual Maxwell-Higgs theories
D. Bazeia, E. da Hora, and R. Menezes
In this work we present a theoretical framework that allows for the existence of coherent twinlike models in the context of self-dual Maxwell-Higgs theories. We verify the consistency of this framework by using it to develop some twinlike self-dual Maxwell-Higgs models. We use a combination of theor ... [Phys. Rev. D 85, 045005 ] published .
[script N]=(0,2) deformation of the CP(1) model: Two-dimensional analog of [script N]=1 Yang-Mills theory in four dimensions
Xiaoyi Cui and M. Shifman
We consider two-dimensional [script N]=(0,2) sigma models with the CP(1) target space. A minimal model of this type has one left-handed fermion. Nonminimal extensions contain, in addition, N right-handed fermions. Our task is to derive expressions for the beta functions valid to all orders. To this ... [Phys. Rev. D 85, 045004 ] published .
Resonant modulational instability and self-induced transmission effects in semiconductors: Maxwell-Bloch formalism
Oleksii A. Smyrnov and Fabio Biancalana
The nonlinear optical properties of semiconductors near an excitonic resonance are investigated theoretically by using the macroscopic J model [Ostreich and Knorr, Phys. Rev. B 48, 17811 (1993); and ibid. 50, 5717 (1994)] based on the microscopic semiconductor Bloch equations. These nonlinear prop ... [Phys. Rev. B 85, 075201 ] published .
Nonlinear entropy transfer via zonal flows in gyrokinetic plasma turbulence
M. Nakata, T.-H. Watanabe, and H. Sugama
Nonlinear entropy transfer processes in toroidal ion temperature gradient (ITG) and electron temperature gradient (ETG) driven turbulence are investigated based on the gyrokinetic entropy balance relations for zonal and non-zonal modes, which are coupled through the entropy transfer function regarde ... [Phys. Plasmas 19, 022303 (2012)] published Mon Feb 6, 2012.
Effect of dimensionality on the continuum percolation of overlapping hyperspheres and hypercubes
S. Torquato
We show analytically that the [0, 1], [1, 1], and [2, 1] Pade approximants of the mean cluster number S for both overlapping hyperspheres and overlapping oriented hypercubes are upper bounds on this quantity in any Euclidean dimension d. These results lead to lower bounds on the percolation threshol ... [J. Chem. Phys. 136, 054106 (2012)] published Fri Feb 3, 2012.
A transparent 90 degrees polarization rotator by combining chirality and electromagnetic wave tunneling
Mehmet Mutlu and Ekmel Ozbay
A three-layer chiral metamaterial is constructed by using two layers of four mutually rotated resonators and a subwavelength mesh sandwiched symmetrically between these layers. The resulting structure is an ultrathin, transparent, and polarization angle independent 90 degrees polarization rotator. ... [Appl. Phys. Lett. 100, 051909 (2012)] published Fri Feb 3, 2012.
Stability of solitary waves in random nonlocal nonlinear media. (arXiv:1202.2074v1 [nlin.PS])
ePrint arXiv http://arXiv.org/
Classification of real three-dimensional Poisson-Lie groups. (arXiv:1202.2077v1 [math-ph])
ePrint arXiv http://arXiv.org/
Dynamical fluctuations in classical adiabatic processes: General description and their implications. (arXiv:1009.3623v3 [physics.class-ph] UPDATED)
ePrint arXiv http://arXiv.org/
Hamiltonian description and traveling waves of the spatial Dysthe equations. (arXiv:1110.3605v2 [physics.class-ph] UPDATED)
ePrint arXiv http://arXiv.org/
Optimal transport by omni-potential flow and cosmological reconstruction. (arXiv:1111.2516v2 [math.AP] UPDATED)
ePrint arXiv http://arXiv.org/
Spatial solitons under competing linear and nonlinear diffractions. (arXiv:1202.1273v1 [math-ph] CROSS LISTED)
ePrint arXiv http://arXiv.org/