نتایج جستجو برای: nonlinear optical response
تعداد نتایج: 1420484 فیلتر نتایج به سال:
Regioregular poly(3-hexylthiophene)s with chain lengths varying from 5 to 100 monomers are synthesized. Poly(3-hexylthiophene)s show in solution an unexpectedly significant second-order nonlinear optical response. The increase in transition dipole moment upon oligomerisation causes the significant second-order nonlinear optical response.
We report the enhancement of the nonlinear optical response of the weakly confined excitons with use of spectrally rectangular pulse. The nonlinear optical response was investigated as a function of excitation energy by a degenerate four-wave-mixing (DFWM) technique. In the case that the laser pulse with the controlled spectral shape excites the plural exciton states simultaneously, the DFWM si...
We demonstrate complete all-optical and phase-stable control of the linear optical polarization and the nonlinear coherent response (third-harmonic generation) of a hybrid nanoplasmonic-photonic system. A few tens of femtoseconds after the excitation, we turn the response on and off at any given point in time and probe its temporal evolution throughout the control process with a three-pulse non...
We have investigated the third-order nonlinear optical response of a glass-ceramic containing sodium niobate (NaNbO3) nanocrystals using picosecond Z-scan and femtosecond optical Kerr gate techniques at 1064 nm and 800 nm, respectively. The results show a large dependence of the nonlinear refraction index (n2) on the volume fraction of NaNbO3 crystallites. Nonlinear absorption is negligible for...
Nodal line semimetals have lately aroused much experimental and theoretical interest, with their gap closing along unconventional trajectories in the three-dimensional Brillouin zone. These or nodal lines can close into loops trace out intricate knotted linked configurations complicated topologies. In this paper, we investigate semiclassical optical response of two linked, unlinked, touching co...
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