Opticist.org

Jean-François Vandenrijt, Marc P. Georges
Electronic speckle pattern interferometry and digital holographic interferometry are investigated at long infrared wavelengths. Using such wavelengths allows one to extend the measurement range and decrease the sensitivity of the techniques to external perturbations. We discuss the behavior of ... [Appl. Opt. 49, 5067-5075 (2010)]

Alexander G. Luchinin
The influence of surface waves and multiple scattering in water on the parameters of light pulses from an airborne source is studied. The contributions of various mechanisms to variations in delay of pulse and its variance are estimated. It is shown that waves make the main contribution to these ... [Appl. Opt. 49, 5059-5066 (2010)]

Researchers in Australia have developed the ability to move particles over large distances, using a specially designed laser beam that can move very small particles up to distances of 1.5 meters using only the power of light.

Behind every coincidence lies a plan -- in the world of classical physics, at least. In principle, every event, including the fall of dice or the outcome of a game of roulette, can be explained in mathematical terms. Researchers in Germany have constructed a device that works on the principle of true randomness. With the help of quantum physics, their machine generates random numbers that cannot be predicted in advance.

Emiliano Terán, Eugenio R. Méndez, Susana Enríquez, Roberto Iglesias-Prieto
We present an experimental and numerical study of the effects of multiple scattering on the optical properties of reef-building corals. For this, we propose a simplified optical model of the coral and describe in some detail methods for characterizing the coral skeleton and the layer containing the ... [Appl. Opt. 49, 5032-5042 (2010)]

Alioune Diouf, Andrew P. Legendre, Jason B. Stewart, Thomas G. Bifano, Yang Lu
We characterize the errors associated with open-loop control of a microelectromechanical system deformable mirror (DM) using an approach that combines sparse calibration of the electrostatic actuator state space with an elastic plate model of the mirror facesheet. We quantify sources of measurement ... [Appl. Opt. 49, G148-G154 (2010)]

Yongkang Dong, Liang Chen, Xiaoyi Bao
We report a high-performance 25km Brillouin-loss-based distributed fiber sensor through optimizing system parameters. First, the Brillouin spectrum distortion and measurement error induced by the excess amplification on probe pulse are investigated, and the results indicate that a low ... [Appl. Opt. 49, 5020-5025 (2010)]

George Zonios, Aikaterini Dimou
A simple two-layer tissue reflectance model is described. This work is a continuation of our investigations on modeling reflectance from two-layered tissues that we recently initiated. In the present article, we describe a variation of a two-layer model that assumes a lower absorbing and scattering ... [Appl. Opt. 49, 5026-5031 (2010)]

Jiulin Gan, Li Shen, Qing Ye, Zhengqing Pan, Haiwen Cai, Ronghui Qu
We propose and analyze a novel orientation-free pressure sensor based on a π-shifted all-single-mode-fiber (SMF) Sagnac interferometer. Compared with a conventional pressure sensor based on high-birefringence polarization-maintaining fiber, this all-SMF structure is more simple, stable, and ... [Appl. Opt. 49, 5043-5048 (2010)]

Olindo Isabella, Janez KrC, and Miro Zeman
Substrates with a modulated surface texture were prepared by combining different interface morphologies. The spatial frequency surface representation method is used to evaluate the surface modulation. When combining morphologies with appropriate geometrical features, substrates exhibit an increased ... [Appl. Phys. Lett. 97, 101106 (2010)] published Wed Sep 8, 2010.

Kyusang Lee, Kuen-Ting Shiu, Jeramy D. Zimmerman, Christopher K. Renshaw, and Stephen R. Forrest
We demonstrate multiple growths of flexible, thin-film indium tin oxide-InP Schottky-barrier solar cells on a single InP wafer via epitaxial lift-off (ELO). Layers that protect the InP parent wafer surface during the ELO process are subsequently removed by selective wet-chemical etching, with the ac ... [Appl. Phys. Lett. 97, 101107 (2010)] published Wed Sep 8, 2010.

K. Iliopoulos, R. Czaplicki, H. El Ouazzani, J. Y. Balandier, M. Chas et al.
We present the third order nonlinear optical study of tetrathiafulvalene-based molecular corners. Degenerate four-wave mixing measurements have been done to provide information about the magnitude and the origin of the nonlinearity, while the nonlinear absorption has been separately measured by perf ... [Appl. Phys. Lett. 97, 101104 (2010)] published Tue Sep 7, 2010.

Natalia Rebrova, Tatiana Habruseva, Guillaume Huyet, and Stephen P. Hegarty
We investigate numerically and experimentally the properties of a passively mode locked quantum dot semiconductor laser under the influence of cw optical injection. We demonstrate that the waveform instability at high pumping for these devices can be overcome when one mode of the device is locked to ... [Appl. Phys. Lett. 97, 101105 (2010)] published Tue Sep 7, 2010.

Hong-Hua Fang, Jie Yang, Ran Ding, Qi-Dai Chen, Lei Wang et al.
The dependence of the fluorescence on the excitation beam polarization under two-photon excitation was studied in a 1,4-bis(R-cyano-4-diphenylaminostyryl)-2,5-diphenylbenzene organic crystal. The crystal shows strong response to the polarization, especially when the pump intensity was increased. The ... [Appl. Phys. Lett. 97, 101101 (2010)] published Tue Sep 7, 2010.

Jun Pan, Yijie Huo, Sunil Sandhu, Norbert Stuhrmann, Michelle L. Povinelli et al.
We experimentally demonstrated that the characteristics of the coherent interaction between two waveguide-coupled resonators can be drastically tuned by changing the propagation phase in the waveguide. In particular, the transmission line shape can be tuned between an electromagnetically induced tra ... [Appl. Phys. Lett. 97, 101102 (2010)] published Tue Sep 7, 2010.

S. Thongrattanasiri, N. A. Kuhta, M. D. Escarra, A. J. Hoffman, C. F. Gmachl et al.
We develop an analytical technique for retrieving the size and shape of subwavelength objects using far-field measurements. The approach relies on subwavelength diffraction gratings scattering evanescent information into the far field along with a numerical algorithm that is capable of deconvoluting ... [Appl. Phys. Lett. 97, 101103 (2010)] published Tue Sep 7, 2010.

Daniele Bajoni, Elizaveta Semenova, Aristide Lemaitre, Sylvain Barbay, Robert Kuszelewicz et al.
Polariton diodes have been recently shown to exhibit pronounced bistability induced by the control of the light-matter coupling via an external bias and optical pumping [D. Bajoni, E. Semenova, A. Lemaitre, S. Bouchoule, E. Wertz, P. Senellart, S. Barbay, R. Kuszelewicz, and J. Bloch, Phys. Rev. Let ... [Appl. Phys. Lett. 97, 091107 (2010)] published Thu Sep 2, 2010.

Y. F. Lao, P. K. D. D. P. Pitigala, A. G. U. Perera, H. C. Liu, M. Buchanan et al.
Hole transitions from the heavy-hole (hh) to the light-hole (lh) band contributing to the 410 [mu]m response range are reported on p-GaAs/AlGaAs detectors. The detectors show a spectral response up to 16.5 [mu]m, operating up to a temperature of 330 K where the lh-hh response is superimposed on th ... [Appl. Phys. Lett. 97, 091104 (2010)] published Thu Sep 2, 2010.

David A. Powell and Yuri S. Kivshar
We demonstrate that the presence of a supporting substrate can break the symmetry of a metamaterial structure, changing the symmetry of its effective parameters, and giving rise to bianisotropy. This indicates that magnetoelectric coupling will occur in all metamaterials fabricated on a substrate, i ... [Appl. Phys. Lett. 97, 091106 (2010)] published Thu Sep 2, 2010.

Kamil Gradkowski, Tomasz J. Ochalski, Nicola Pavarelli, David P. Williams, Guillaume Huyet et al.
We investigate the emission dynamics of InAs/GaAs quantum dots (QDs) coupled to an InGaAs quantum well in a tunnel injection scheme by means of time-resolved photoluminescence. Under high-power excitation we observe a redshift in the QD emission of the order of 20 meV. The optical transition intensi ... [Appl. Phys. Lett. 97, 091105 (2010)] published Thu Sep 2, 2010.