Plasmon Definition and 28 Threads

I read a paper about coherent surface plasmon amplification by free electron pumping in an article a few days ago. It seems to work as some kind of free electron laser-like light source, and I wonder how high the energy of photons can go in this way. Also I read in another paper about...

Hi there, To be clear, this is not a homework question, I am a graduate student reading about the use of plasmonics for biosensing. I felt I should post here instead of in the "general physics" forum since I do have questions, but they are more qualitative, nonetheless I will try to follow the...

When I read “Extraordinary optical transmission through sub-wavelength hole arrays”, I saw this figure but I don't get the bulk plasmon peak at 326 nm. What is the mean of bulk plasmon peak?

I'm studying plasmons from "Haken-Quantum Field Theory of Solids", and i need some help in the calculation of the equation of motion of eletrons' density \begin{equation} \hat{\rho}_{\overrightarrow{q}} = \frac{1}{\sqrt{V}} \sum_{\overrightarrow{k}}...

Negative permittivity of metals – The effect of light-trapping via plasmonics I’m trying to understand the effect of light-trapping by plasmonics (for example - Localized Surface Plasmon Resonance, Surface Plasmon Polariton, Scattered Plasmons), and how negative permittivity related to that...

Homework Statement Consider the metal-vacuum interface located at z = 0,the metal filling the entire half-space z ≥ 0, vacuum filling (!?) the half-space z < 0. The dielectric function in the metal in the long-wavelength limit is given by: where ε0 is the vacuum permittivity. In the metal a...

Hello, Plasmons are waves formed by electron density fluctuations on a metallic surface. Basically once excited, they can propagate freely along a suitable metallic-dielectric surface, decaying relatively quickly. I'm interested in the y-axis component of the wave, perpendicular to the...

Now plasma represents collective wave-like motions of charged particles. In 3D, their frequency is well known to be almost a constant, ##\omega^{3D}_p \approx \sqrt{4\pi ne^2/m}## with n=charge density, m=particle mass. However, in 2D, one can show that it becomes ##\omega^{2D}_p \sim...

Hey everyone, I was recently reading a paper on surface enhanced Raman scattering, and it mentioned that plasmons (and for that matter surface plasmon polaritons-where my interest lies) are sensitive to the surface to volume ratio of the structure. I can begin to understand intuitively with...

I am conducting an experiment on the parabolic trough that concentrates the solar light and heats up water. I am using different metal sheets (zinc, aluminium, copper, tin...) for the parabolic trough to see the differences in temperature change. I researched on a few things and I understand...

From my understanding, surface plasmons (SPs) are oscillations of electrons caused by incident EM waves. A photon from the EM wave can couple with a plasmon to create a surface plasmon polariton (SPP). Some books/websites use the words SPP and SP interchangeably, so I am confused as to whether...

The chips used for surface plasmon resonance are fairly expensive. Does anyone know what nanofabrication techniques are used to make the chips? I've been told they are relatively easy to make if one has access to a nanoscale facility.

Kittel solid state physics book ( chapter 14)says when dielectric permittivity is zero, then longitudinal polarization wave possibly exists. It is hard to imagine how this is possible. Can anybody explain this? If the permittivity is zero, then there shouldn'n be any response, right? How come...

Hello everyone! I would like to ask you for help on this: 1. what are the differences between polariton, polaron and plasmon? 2. such as theoretical aspects I have to know to understand the functioning of a spaser? (spaser=surface plasmon amplification by stimulated emission of radiation)...

Can someone please explain how these graphs were obtained? There's no Hy in the equation given. Thanks in advance. http://snag.gy/utX7W.jpg

I need an explantion of the following description of plasmon, "Plasmon energies in the range of 5-30eV for electron systems of metallic densities,consequently they play no role in determining the thermodynamic properties of the electron system." What kind of thermodynamic properties are...

I'm trying to grasp the basic concepts of plasmons and can't quite picture what is going on. When light is incident on small metal nanoparticles, it causes the conduction electrons of the metal to oscillate at the frequency of the photon. Is that a plasmon? Is that also the same as it...

I found a lot the the surface plasmon on prism geometry are using gold for metal film, and part of it are using silver. Why we need use gold or sivler as a metal film, is it about the condutivity?

Hi everyone, I am trying to figure out what is the coupling of a surface plasmon with a photon for the generation of a surface plasmon polariton. In fact I don't understand what a coupling is in this context. Some texts say that for the coupling to happen is necessary that the dispersion...

Hi guys; I have a question about the Plasmon frequencies in metals I know that it can be calculated as following: ωp2=Ne2/ε0meff I was just wondering if anyone knows it is possible to change the plasmon frequency of any metal let say silver experimentally or not. I am working on metallic...

As I know main limitation of superconducting energy storage is Lorentz forces which are created by magnetic field and ultimately destroy a superconducting ring. But there exist so called plasmon waves or plasma waves which could spread in metals and plasma. If I no make mistake they don't...

What's the difference between a plasmon and the wave that propagates through a wire when you flip a light switch?

I'm trying understand surface plasmon resonance in a gold film, and have decided that gold must have a refractive index of say 5-10ish in optical light. However I'm not sure and I think I might be on the wrong track. Also does negative refractive index have anything to do with surface plasmon...

hi everyone, i am doing a research on plasmonics and surface plasmonic effects in heating nano materials using em waves... can you suggest me any resources otherthan wikipedia where i can get an introduction to all this...please suggest me a source which is simple to understand... also is...

surface plasmon?? hi Can anyone explain to me what's the surface plasmon? thanks

Hi guys: Why people consider the plasmon ocsilation as a longitudinal wave? Thank you for your answer. sinayu

I need help with a problem in solid state physics: Find the dispersion relation of long-wavelength plasmons in a simple tetragonal crystal in the case of almost empty band built of s-type orbitals. What happens in the case when m_{xx} << m_{zz} ? This is what I did for now (with some help...