研究目的
Investigating the loss compensation of surface plasmon polaritons (SPPs) in organic/silver nanowire heterostructures and their application in photonic logic processing.
研究成果
The study demonstrated loss compensation of subwavelength signals in embedded organic/silver nanowire heterostructures and their application in photonic logic processing. The heterostructures exhibited efficient exciton-plasmon coupling and transferred the exciton energy to SPPs. Loss compensation of SPPs was achieved based on stimulated emission of strongly confined SPPs. Furthermore, the individual heterostructure with two excitation spots possessed cascade gain, enabling the achievement of basic Boolean logic unit at nanoscale. These results offer a novel understanding of the assembly mechanism of hybrid materials and are essential for incorporating plasmonic amplifiers as practical components into high-capacity photonic circuits.
研究不足
The yield of the organic/Ag heterostructure with two excitation spots is lower than that of the sample with only one excitation spot. For larger pump powers (> 12 μJ cm?2), lasing in the organic crystal was observed and became the dominant gain process, which suppressed the further enhancement of SPP signals.
1：Experimental Design and Method Selection:
The study involved the synthesis of organic/silver nanowire heterostructures by inserting silver nanowires (AgNWs) into crystalline organic microwires, serving as a microscale optical gain medium.
2：Sample Selection and Data Sources:
The materials used included 1-(4-Bromo-2-hydroxy-phenyl)-3-[4-(1-ethyl-propyl)-phenyl]-propenone (BHEP) and silver nanowires (AgNWs).
3：List of Experimental Equipment and Materials:
Scanning electron microscopy (SEM, FEI Nova NanoSEM450), transmission electron microscopy (TEM, JEOL JEM-2010), fluorescence-lifetime imaging microscopy (FLIM), UV-visible spectrometer (Perkin-Elmer Lambda 35), fluorescent spectrometer (Hitachi F-7000), inverted fluorescence microscope (Nikon Ti-U), monochrometer (Princeton Instrument Acton SP 2300i), EMCCD (Princeton Instrument ProEM 1600B).
4：Experimental Procedures and Operational Workflow:
The heterostructures were prepared by embedding AgNWs in BHEP crystals during crystal growth in the liquid phase. Optical characterizations were performed to study the loss compensation of SPPs.
5：Data Analysis Methods:
The decay kinetics was characterized by FLIM, and the output signal enhancement factor was defined to evaluate the internal optical gain.
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