Well-aligned iodine molecular wires were synthesized by means of loading iodine molecules in the elliptical nanometer-scale channels of AlPO(4)-11 (AEL) single crystals. Polarized Raman spectra reveal that the iodine molecular wires are oriented along the crystal channel direction by lining iodine molecules on the yz plane, where y and z represent the channel direction and the major-axial direction of the elliptical rings, respectively. Natural iodine wires are unstable, but they are very stable in the AEL channels. The template technique offers us an ideal platform to study the novel properties of these molecular wires.
The symmetrically and asymmetrically double-coated metal nanofilms are presented to transmit the modified surface plasmon polaritons. Compared with the short-range surface plasmon polaritons on single-coated metal nanofilms, the mode widths of the modified surface plasmon polaritons increase a little, but their propagation distances can increase three orders of magnitude, correspondingly their 1D figures of merit increase nearly three orders of magnitude. The long-range propagation together with the deep-subwavelength confinement of light energy makes the planar waveguides particularly useful in the fields of nanophotonics, integrated photonic circuits and nonlinear optics.
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