Laser ion source with a double pulse laser system
M. Okamura, K. Kondo, G. Gish Allouche, and T. Yamamoto
To extend an ion beam pulse of a laser ion source, multiple laser shots could be used. To check the feasibility of this idea, we tested double laser irradiations on an iron target. When the interval of the two laser shots is longer than 10 [mu]s, the obtained ion current profile was expressed as a s ... [Rev. Sci. Instrum. 83, 02B308 (2012)] published Mon Feb 13, 2012.
Terahertz composite right-left handed transmission-line metamaterial waveguides
Zhijun Liu, Philip W. C. Hon, Amir A. Tavallaee, Tatsuo Itoh, and Benjamin S. Williams
We report terahertz metamaterial waveguides based on the concept of composite right/left-handed transmission-lines. The waveguides are implemented in a metal-insulator-metal geometry fabricated with spin-coated Benzocyclobutene and contact photolithography. Angle-resolved reflection spectroscopy sho ... [Appl. Phys. Lett. 100, 071101 (2012)] published Mon Feb 13, 2012.
Optical properties of a periodic array of slit-groove
Guo-dong Wang, Cheng-ping Huang, Yi Zhang, Qian-jin Wang, and Yong-yuan Zhu
The optical properties of a periodic slit-groove array perforated in a metal film have been studied experimentally and theoretically. Due to the interplay between periodic slits and periodic grooves, a switching from transmission minimum to maximum and the appearance of an additional dip were experi ... [J. Appl. Phys. 111, 034316 (2012)] published Mon Feb 13, 2012.
Theoretical description of thermal lens spectrometry in micro space
Mingqiang Liu, Dorota Korte, and Mladen Franko
For thermal lens spectrometry in micro space, temperature distributions in the sample under continuous-wave modulated excitations of either laser or incoherent light source (ILS) are for the first time deduced with respective considerations of different experimental parameters, such as flow of the s ... [J. Appl. Phys. 111, 033109 (2012)] published Mon Feb 13, 2012.
Extraction of optical Bloch modes in a photonic-crystal waveguide
S. R. Huisman, G. Ctistis, S. Stobbe, J. L. Herek, P. Lodahl et al.
We perform phase-sensitive near-field scanning optical microscopy on photonic-crystal waveguides. The observed intricate field patterns are analyzed by spatial Fourier transformations, revealing several guided transverse electric (TE) and transverse magnetic (TM) like modes. Using the reconstruction ... [J. Appl. Phys. 111, 033108 (2012)] published Mon Feb 13, 2012.
Nonlocal Transformation Optics
Giuseppe Castaldi, Vincenzo Galdi, Andrea Alu, and Nader Engheta
We show that the powerful framework of transformation optics may be exploited for engineering the nonlocal response of artificial electromagnetic materials. Relying on the form-invariant properties of coordinate-transformed Maxwell's equations in the spectral domain, we derive the general constituti ... [Phys. Rev. Lett. 108, 063902 ] published .
Dissipative quantum-light-field engineering
Martin Kiffner, Uwe Dorner, and Dieter Jaksch
We put forward a dissipative preparation scheme for strongly correlated photon states. Our approach is based on a two-photon loss mechanism that is realized via a single four-level atom inside a bimodal optical cavity. Each elementary two-photon emission event removes one photon out of each of the t ... [Phys. Rev. A 85, 023812 ] published .
Lowering the excitation threshold of a random laser using the dynamic scattering states of an organosiloxane smectic A liquid crystal
Stephen M. Morris, Damian J. Gardiner, Malik M. Qasim, Philip J. W. Hands, Timothy D. Wilkinson et al.
Smectic A liquid crystals, based upon molecular structures that consist of combined siloxane and mesogenic moieties, exhibit strong multiple scattering of light with and without the presence of an electric field. This paper demonstrates that when one adds a laser dye to these compounds it is possibl ... [J. Appl. Phys. 111, 033106 (2012)] published Fri Feb 10, 2012.
Bloch surface waves-controlled fluorescence emission: Coupling into nanometer-sized polymeric waveguides
Mirko Ballarini, Francesca Frascella, Emanuele Enrico, Pietro Mandracci, Natascia De Leo et al.
The lateral confinement of Bloch surface waves on a patterned multilayer is investigated by means of leakage radiation microscopy (LRM). Arrays of nanometric polymeric waveguides are fabricated on a proper silicon-nitride/silicon-oxide multilayer grown on a standard glass coverslip. By exploiting th ... [Appl. Phys. Lett. 100, 063305 (2012)] published Fri Feb 10, 2012.
Half-harmonic Kelvin probe force microscopy with transfer function correction
Senli Guo, Sergei V. Kalinin, and Stephen Jesse
An approach for surface potential imaging based on half-harmonic band excitation (BE) in Kelvin probe force microscopy is demonstrated. Using linear and half-harmonic BE enables quantitative correction of the cantilever transfer function. Half-harmonic band excitation Kelvin probe force microscopy ( ... [Appl. Phys. Lett. 100, 063118 (2012)] published Fri Feb 10, 2012.
Mechanically compliant grating reflectors for optomechanics
Utku Kemiktarak, Michael Metcalfe, Mathieu Durand, and John Lawall
We demonstrate micromechanical reflectors with a reflectivity as large as 99.4% and a mechanical quality factor Q as large as 7.8 x 10 for optomechanical applications. The reflectors are silicon nitride membranes patterned with sub-wavelength grating structures, obviating the need for the many die ... [Appl. Phys. Lett. 100, 061124 (2012)] published Fri Feb 10, 2012.
Enhanced spontaneous emission from quantum dots in short photonic crystal waveguides
Thang Ba Hoang, Johannes Beetz, Leonardo Midolo, Matthias Skacel, Matthias Lermer et al.
We report a study of the quantum dot (QD) emission in short photonic crystal waveguides. We observe that the quantum dot photoluminescence intensity and decay rate are strongly enhanced when the emission energy is in resonance with Fabry-Perot (FP) cavity modes in the slow-light regime of the disper ... [Appl. Phys. Lett. 100, 061122 (2012)] published Fri Feb 10, 2012.
Virtual ghost imaging through turbulence and obscurants using Bessel beam illumination
Ronald E. Meyers, Keith S. Deacon, Arnold D. Tunick, and Yanhua Shih
We experimentally demonstrate a single sensor virtual ghost imaging (VGI) configuration that uses the physics of nearly diffraction free light sources to penetrate partially obscuring media or turbulent media and generate images of remote opaque objects. Randomly displaced nearly diffraction free Be ... [Appl. Phys. Lett. 100, 061126 (2012)] published Fri Feb 10, 2012.
Directional waveguide coupling from a wavelength-scale deformed microdisk laser
Brandon Redding, Li Ge, Glenn S. Solomon, and Hui Cao
We demonstrate uni-directional evanescent coupling of lasing emission from a wavelength-scale deformed microdisk to a waveguide. This is attributed to the Goos-Hanchen shift and Fresnel filtering effect that result in a spatial separation of the clockwise (CW) and counter-clockwise (CCW) propagating ... [Appl. Phys. Lett. 100, 061125 (2012)] published Fri Feb 10, 2012.
Periodically focused modes in chains of dielectric spheres
Arash Darafsheh and Vasily N. Astratov
We show that, theoretically, Brewster angle conditions for transverse magnetic polarized rays can be periodically reproduced in chains of spheres with index n = sqrt(3) giving rise to lossless periodically focused modes with 2D period, where D is the sphere diameter. Using ray tracing for a spherica ... [Appl. Phys. Lett. 100, 061123 (2012)] published Fri Feb 10, 2012.
Monitoring stimulated emission at the single-photon level in one-dimensional atoms
D. Valente, S. Portolan, G. Nogues, J. P. Poizat, M. Richard et al.
We theoretically investigate signatures of stimulated emission at the single-photon level for a two-level atom interacting with a one-dimensional light field. We consider the transient regime where the atom is initially excited, and the steady-state regime where the atom is continuously driven with ... [Phys. Rev. A 85, 023811 ] published .
Resonance-fluorescence-localization microscopy with subwavelength resolution
Zeyang Liao, M. Al-Amri, and M. Suhail Zubairy
We evaluate the resonance-fluorescence spectrum of a bunch of two-level atoms driven by a gradient coherent laser field. The result shows that we can determine the positions of atoms from the spectrum even when the atoms locate within the subwavelength range and the dipole-dipole interaction is sign ... [Phys. Rev. A 85, 023810 ] published .
Quantum theory analysis of triple photons generated by a chi process
A. Dot, A. Borne, B. Boulanger, K. Bencheikh, and J. A. Levenson
We present a quantum theoretical analysis of triple photons generated by a phase-matched third-order nonlinear process in a KTP crystal in a weak-interaction regime. We show that the quantum properties of the triple photons can be brought to light through optical second- and third-order sum frequenc ... [Phys. Rev. A 85, 023809 ] published .
Proposal for isolated-attosecond-pulse generation in the multicycle regime through modulation of the carrier wave
Yang Xiang, Yueping Niu, and Shangqing Gong
An intuitive physical mechanism for isolated-attosecond-pulse generation in a multicycle pulse regime is proposed. We suggest that the continuum spectra of the high-order harmonics can be controlled through the modulation of carrier wave, while keeping the multicycle envelope unchanged approximately ... [Phys. Rev. A 85, 023808 ] published .
Surface plasmon resonance-enabled antibacterial digital versatile discs
Xuan Dou, Pei-Yu Chung, Peng Jiang, and Jianli Dai
We report the achievement of effective sterilization of exemplary bacteria including Escherichia coli and Geobacillus stearothermophilus spores on a digital versatile disc (DVD). The spiral arrangement of aluminum-covered pits generates strong surface plasmon resonance (SPR) absorption of near-infra ... [Appl. Phys. Lett. 100, 063702 (2012)] published Thu Feb 9, 2012.
Manifestation of quantum disordered wave functions with weak localization from conical second harmonic generation in ferroelectric crystal
H. H. Yu, H. J. Zhang, Z. P. Wang, H. H. Xu, Y. C. Wang et al.
The spatial structure of two-dimensional quantum disordered wave functions with weak localization (WL) is experimentally observed using a calcium barium niobate CaBaNbO (CBN-28) ferroelectric crystal illuminated by a pulsed laser beam. Non-collinear phase-matching in CBN-28 produces conical second h ... [Appl. Phys. Lett. 100, 061119 (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 .
Experimental Estimate of a Classicality Witness via a Single Measurement
G. H. Aguilar, O. Jimenez Farias, J. Maziero, R. M. Serra, P. H. Souto Ribeiro et al.
The perception that quantum correlations can still appear in separable states has opened exciting new possibilities regarding their use as a resource in quantum information science. Quantifying such quantum correlations involves the complete knowledge of the system's state and numerical optimization ... [Phys. Rev. Lett. 108, 063601 ] published .
Extremal transmission through a microwave photonic crystal and the observation of edge states in a rectangular Dirac billiard
S. Bittner, B. Dietz, M. Miski-Oglu, and A. Richter
This paper presents experimental results on properties of waves propagating in an unbounded and a bounded photonic crystal consisting of metallic cylinders that are arranged in a triangular lattice. First, we present transmission measurements of plane waves traversing a photonic crystal. The experim ... [Phys. Rev. B 85, 064301 ] published .
Deducing radiation pressure on a submerged mirror from the Doppler shift
Masud Mansuripur
Radiation pressure on a flat mirror submerged in a transparent liquid depends not only on the refractive index n of the liquid but also on the phase angle psi of the Fresnel reflection coefficient of the mirror, which could be anywhere between 0 and 180. Depending on the value of psi, the momentum p ... [Phys. Rev. A 85, 023807 ] published .
Remote lasing in air by recombination and electron impact excitation of molecular nitrogen
Joseph Penano, Phillip Sprangle, Bahman Hafizi, Daniel Gordon, Richard Fernsler et al.
We analyze and simulate the physical mechanisms for a remote atmospheric lasing configuration which utilizes a combination of an ultrashort pulse laser to form a plasma filament of seed electrons, and a heater beam to heat the seed electrons. Nitrogen molecules are excited by electron impact and rec ... [J. Appl. Phys. 111, 033105 (2012)] published Wed Feb 8, 2012.
Analysis of temporal jitter in a copper vapor laser system
D. Durga Praveen Kumar, L. M. Gantayet, Sunita Singh, A. S. Rawat, Paramjit Rana et al.
Temporal jitter in a magnetic pulse compression based copper vapor laser (CVL) system is analyzed by considering ripple present in the input dc power supply and ripple present in the magnetic core resetting power supply. It is shown that the jitter is a function of the ratio of operating voltage to ... [Rev. Sci. Instrum. 83, 025105 (2012)] published Wed Feb 8, 2012.
Symmetry-breaking diffraction and dynamic self-trapping in optically induced hexagonal photonic lattices
Sheng Liu, Yi Hu, Peng Zhang, Xuetao Gan, Cibo Lou et al.
We demonstrate both experimentally and numerically linear symmetry-breaking diffraction and nonlinear dynamic self-trapping of an optical beam in hexagonal photonic lattices. We show that a stripe multivortex beam undergoes asymmetric linear diffraction, but evolves into a moving self-trapped beam u ... [Appl. Phys. Lett. 100, 061907 (2012)] published Wed Feb 8, 2012.
Erratum: Controlling the stimulated Brillouin scattering of self-focusing nanosecond laser pulses in silica glasses [Phys. Rev. A 83, 063829 (2011)]
Sarah Mauger, Luc Berge, and Stefan Skupin
Abstract not available. [Phys. Rev. A 85, 029902 ] published .
Back-reaction effects of quantum vacuum in cavity quantum electrodynamics
I. Carusotto, S. De Liberato, D. Gerace, and C. Ciuti
We theoretically study an optical system in which the back-reaction of quantum vacuum manifests itself as a sizable suppression of the absorption by a three-level emitter embedded in an optical cavity. A theoretical model including the anti-rotating-wave terms of the light-matter interaction Hamilto ... [Phys. Rev. A 85, 023805 ] published .
Number-phase Wigner representation for scalable stochastic simulations of controlled quantum systems
M. R. Hush, A. R. R. Carvalho, and J. J. Hope
Simulation of conditional master equations is important to describe systems under continuous measurement and for the design of control strategies in quantum systems. For large bosonic systems, such as Bose-Einstein condensates and atom lasers, full quantum-field simulations must rely on scalable sto ... [Phys. Rev. A 85, 023607 ] published .
Identifying and evaluating organic nonlinear optical materials via molecular moments
A. P. Higginbotham, J. M. Cole, M. A. Blood-Forsythe, and D. D. Hickstein
We demonstrate how to appropriately estimate the zero-frequency (static) hyperpolarizability of an organic molecule from its charge distribution, and we explore applications of these estimates for identifying and evaluating new organic nonlinear optical (NLO) materials. First, we calculate hyperpola ... [J. Appl. Phys. 111, 033512 (2012)] published Tue Feb 7, 2012.
Highly tunable whispering gallery mode semiconductor lasers with controlled absorber
A. N. Baranov, G. Boissier, R. Teissier, A. M. Monakhov, V. V. Sherstnev et al.
Tunable semiconductor lasers with controlled absorber based on GaInAsSb/GaAlAsSb quantum well heterostructure was fabricated and experimentally studied. The emission wavelength of these lasers shifts from 2.24 to 2.28 [mu]m when the bias on the control contact decreases from the voltage equal to tha ... [Appl. Phys. Lett. 100, 061112 (2012)] published Tue Feb 7, 2012.
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 .