arXiv subjects

Y. Q. Xu

Publications and source records attributed to Y. Q. Xu.

2 recordsLinked to original sources

arXiv2016

Efficiency of dispersive wave generation from a dual-frequency beat signal

The emission of dispersive waves (DWs) by temporal solitons can be described as a cascaded four-wave mixing process triggered by a pair of monochromatic continuous waves (CWs). We report experimental and numerical results demonstrating that the efficiency of this process is strongly and non-trivially affected by the frequency detuning of the CW pump lasers. We explain our results by showing that individual cycles of the input dual-frequency beat signal can evolve as higher-order solitons whose temporal compression and soliton fission govern the DW efficiency. Analytical predictions based on the detuning dependence of the soliton order are shown to be in excellent agreement with experimental and numerical observations.

physics.optics↗

arXiv2013

Electronic transport properties of indolyl spirooxazine/merooxazine-based light-driven molecular switch: The effect of amino/nitro substituents

By applying non-equilibrium Green's function formulation combined with first-principles density functional theory,we explore the electronic transport properties of indolinospironaphthoxazine (SO)/indolinomeronaphthoxazine (MO).The results indicate that the MO allows a far larger current than the SO.The substituent group can cause the shift of the energy levels.Higher ON/OFF current ratio can be obtained if either amino or nitro substituent is placed at the position of naphthalene moiety.Our results suggest that such molecular wires can generally display perfect switching function and the efficiency can be tuned flexibly by adding certain substituent groups to the molecules.

cond-mat.mes-hall↗