Propagating nature of Surface plasmon polaritons (SPP) is well established and there are several reports employing SPPs for information processing. Whereas Localized Surface Plasmon Resonance (LSPR) is generally used in sensing applications.
My query is, that can LSPR be coupled and can they propagate and can they be used in carrying informations just like photons and SPPs. Are there any reports on this?
Dear Kaushik.
I am not aware of reports concerning the use of this phenomenon to propagate information. I am afraid the associated propagation length is too small. Below, you find a qualitative interpretation of the phenomenon. Hope it helps...
Localized Surface Plasmon Resonance occurs around extremely small particles (metallic nanoparticles of tens of nanometers in size) and is localized to the particle's surface. Here, the propagation length concept is somewhat irrelevant given the fact that the collective oscillations of electrons is confined to an extremely small surface area.
Once the particle's size increases, the penetration depth of the incoming radiation field starts being insufficient to excite the resonance, unless one keeps one of the particle's dimensions within the tens of nanometers while increasing the other dimensions. In this case, one starts getting some sort of a metallic film and the associated phenomenon has been designated as Surface Plasmon Resonance, where the incoming transverse radiation field excites a longitudinal surface wave consisting of collective oscillations of electrons in relation to their nuclei. This wave propagates along the metallic surface but is highly damped by the characteristic absorption of metals at these wavelengths, thus the wave's propagation length is rather short.
Dear Kaushik
I think what you mentioned Paulo Lourenço is very true and accurate.
If the distance between plasmonic nanoparticles is less than their diameter, they can effectively interact and support the collective plasmonic mode.
Dear Sergii V. Mamykin thanks for your answer. Is there any research article in which they have shown it?
Dear Vishal Kaushik,
You could see:
1. Pinchuk, A. O., & Schatz, G. C. (2008). Nanoparticle optical properties: Far-and near-field electrodynamic coupling in a chain of silver spherical nanoparticles. Materials Science and Engineering: B, 149(3), 251-258.
2. Dan'ko, V., Dmitruk, M., Indutnyi, I., & Mamykin, S. Fabrication of periodic plasmonic structures using interference lithography and chalcogenide photoresist. Nanoscale Res. Lett. 2015. 10.
3. Dan’ko, V., Dmitruk, M., Indutnyi, I., Mamykin, S., Myn’ko, V., Shepeliavyi, P., ... & Lytvyn, P. (2017). Au gratings fabricated by interference lithography for experimental study of localized and propagating surface plasmons. Nanoscale research letters, 12(1), 1-6.
or just type "collective plasmonic mode" in google scholar.
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