Virtual Journal of Laser

Feng Liang, Quan Sun, Daniel Gingras, Real Vallee, and See Leang Chin
The transition from smooth modification to nanograting was observed during nanograting formation in fused silica. This transition is very sensitive to the input laser intensity. A small deviation from the critical intensity will result in the formation of either smooth modification or nanograting. T ... [Appl. Phys. Lett. 96, 101903 (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.

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.

F. Dumas-Bouchiat, L. F. Zanini, M. Kustov, N. M. Dempsey, R. Grechishkin et al.
Thermomagnetic patterning (TMP) of 4 [mu]m thick high performance NdFeB hard magnetic films deposited on Si substrates has been achieved using single pulsed laser irradiation. Uniaxially magnetised chessboard and stripe patterns with lateral feature sizes in the range 50100 [mu]m were produced. Th ... [Appl. Phys. Lett. 96, 102511 (2010)] published Wed Mar 10, 2010.

J. K. Wahlstrand, H. Zhang, and S. T. Cundiff
We describe a technique for transverse electroreflectance that uses broadband optical pulses from a mode-locked laser and a rapidly oscillating bias with a frequency near half the laser repetition rate. Since the electrodes are electrically isolated from the sample, highly nonuniform trap-enhanced f ... [Appl. Phys. Lett. 96, 101104 (2010)] published Tue Mar 9, 2010.

Lorenzo Dominici, Luigi Vesce, Daniele Colonna, Francesco Michelotti, Thomas M. Brown et al.
We quantify the strong dependence of photocurrent on the angle of incidence of light in a dye solar cell (DSC). Under laser illumination the photocurrent increases for large incidence angles. The enhancements are different upon using or not a coupling prism. They are explained with a model including ... [Appl. Phys. Lett. 96, 103302 (2010)] published Tue Mar 9, 2010.

I. Amarilio-Burshtein, S. Tamir, and Y. Lifshitz
ZnO nanowires (NWs) and other nanostructures were grown by laser ablation of a ZnO containing target onto different substrates with and without the presence of an Au catalyst. The morphology and structure of the NWs were studied using high resolution scanning and transmission electron microscopes [i ... [Appl. Phys. Lett. 96, 103104 (2010)] published Mon Mar 8, 2010.

Miriam S. Vitiello and Gaetano Scamarcio
We report on the time-resolved measurement of the in-plane (v) and cross-plane (v) components of the heat transfer velocity in GaAs/AlGaAs quantum-cascade heterostructures. We compared the heating and cooling stages both in the active region and in the substrate with models of heat transfer in nanos ... [Appl. Phys. Lett. 96, 101101 (2010)] published Mon Mar 8, 2010.

Chudong Xu, Zhifeng Chen, Daxin Chen, Shiming Zhou, and Tianshu Lai
A controllable pump-pulse-number magneto-optical Kerr technique combined with an initializing field scanning approach is developed to eliminate and identify memory and accumulation effects, respectively, from external field history and multiple pulse excitations. A series of anomalous loops of GdFeC ... [Appl. Phys. Lett. 96, 092514 (2010)] published Fri Mar 5, 2010.

Aurelien Delestre, Michel Lahaye, Evelyne Fargin, Matthieu Bellec, Arnaud Royon et al.
Thermal poling of sodium borophosphate niobium glasses, previously coated with a thin silver layer micropatterned by femtosecond laser irradiation, is demonstrated. The field-assisted ion-exchange process for fabricating planar surface in this glass substrate is analyzed. Inside the silver ablated l ... [Appl. Phys. Lett. 96, 091908 (2010)] published Wed Mar 3, 2010.