1,568 research outputs found
Coherence controlled soliton interactions
We demonstrate theoretically and subsequently observe in experiment a novel type of soliton
interaction when a pair of closely spaced spatial optical solitons as a whole is made partially incoherent.
We explain how the character of the soliton interaction can be controlled by the total partial incoherence,
and show a possibility to change the soliton interaction from attractive to repulsive, or vice versa, near a
certain threshold in the coherence parameter
Photorefractive polymeric solitons supported by orientationally enhanced birefringent and electro-optic effects
We predict and analyze the formation of photorefractive polymeric solitons, which are supported by both the orientationally enhanced birefringence and the orientationally enhanced electro-optic effects. The formation conditions and characteristics of this new type of optical spatial soliton are discussed
Large-Scale Processes Associated with Inter-Decadal and Inter-Annual Early Spring Rainfall Variability in Taiwan
Coherence controlled soliton interactions
We demonstrate theoretically and subsequently observe in experiment a novel
type of soliton interaction when a pair of closely spaced spatial optical
solitons as a whole is made partially incoherent. We explain how the character
of the soliton interaction can be controlled by the total partial incoherence,
and show a possibility to change the soliton interaction from attractive to
repulsive, or vice versa, near a certain threshold in the coherence parameter.Comment: 4 pages, 4 figure
Soliton transverse instabilities in anisotropic nonlocal self-focusing media
We study, both theoretically and experimentally, the transverse modulational
instability of spatial stripe solitons in anisotropic nonlocal photorefractive
media. We demonstrate that the instability scenarios depend strongly on the
stripe orientation, but the anisotropy-induced features are largely suppressed
for spatial solitons created by self-trapping of partially incoherent light.Comment: 3 pages including 4 figures (2 theoretical and 2 experimental).
submitted to Optics Letter
Decadal Oscillation of Fall Temperature in Taiwan
This study verifies the existence of an evident decadal oscillation in fall (September - November) temperature for Taiwan. It has an island-wide spatial pattern and a central frequency of 11 years. Acorresponding decadal-oscillation mode of tropical sea surface temperature (SST) is found to be largely responsible for inducing the decadal temperature oscillation for Taiwan via the following regulating processes. On a decadal timescale, periods of decadal warming in Taiwan concur with major cold anomalies in tropical SST over the eastern Indian Ocean and the central Pacific. These cold SST anomalies modulate tropical Walker circulation so as to produce anomalous descending centers in their regions. Meanwhile, the complementary anomalous ascending motion and anomalous low-level convergence center occur near the Maritime continent. These anomalous ascending and descending centers act as tropical forcing sources to evoke a low-level Rossby-wave-like circulation anomaly in the Asian-Pacific regions. Taiwan is surrounded by a low-level anomalous high to its east and an anomalous low to its west. These circulations induce anomalous flows from the south to warm Taiwan via anomalous warm advection. The above regulating processes reverse in polarity during periods of decadal cooling in Taiwan
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