Surface plasmons not exist for transverse polarisation?

In summary, surface plasmons are collective oscillations of free electrons at the interface between a metal and a dielectric material. They can only exist for longitudinal polarisation and have significant implications in nanophotonics, enabling the manipulation of light at the nanoscale. Surface plasmons can be excited using various methods and have potential applications in energy harvesting, such as in solar cells.
  • #1
venu279
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surface plasmons not exist for transverse electric polarisation? and only exist for transverse magnetic polarisation
can anyone help meeeeeeeeeeeeeeeeeeee please
 
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  • #2
No, SPs exist for both (s & p) polarizations.
The usual case of p-polarization can be found in the standard textbooks. For s-polarization i refer you to R. Ruppin - Phys.Lett.A 277, 61 because i find it difficult to explain it in words.
 
  • #3


I can provide some information on this topic. Surface plasmons are collective oscillations of electrons at the interface between a metal and a dielectric material. These oscillations are excited by an electromagnetic wave and can propagate along the surface of the metal.

To answer your question, it is true that surface plasmons do not exist for transverse electric (TE) polarisation. This is because for TE polarisation, the electric field is perpendicular to the interface, and therefore does not interact with the electrons at the surface.

However, surface plasmons do exist for transverse magnetic (TM) polarisation. In this case, the magnetic field is parallel to the interface and can interact with the electrons, causing the excitation of surface plasmons.

So, in summary, surface plasmons can only exist for transverse magnetic polarisation, not for transverse electric polarisation. I hope this helps clarify your question.
 

1. What are surface plasmons?

Surface plasmons are collective oscillations of free electrons at the interface between a metal and a dielectric material. They are excited by electromagnetic waves and can result in enhanced light-matter interactions.

2. Why do surface plasmons not exist for transverse polarisation?

Surface plasmons can only exist for longitudinal polarisation because the electric field of the surface plasmon must be parallel to the metal-dielectric interface. For transverse polarisation, the electric field is perpendicular to the interface, making it impossible for a surface plasmon to exist.

3. What is the significance of surface plasmons in nanophotonics?

Surface plasmons have a significant impact on nanophotonics because they can confine light to subwavelength scales, enabling the manipulation of light at the nanoscale. This has potential applications in sensing, imaging, and information processing.

4. How are surface plasmons excited?

Surface plasmons can be excited by various methods, including prism coupling, grating coupling, or using a metal nanostructure such as a nanowire or nanoparticle. The excitation is typically achieved by focusing a laser beam or using a near-field scanning microscope.

5. Can surface plasmons be used for energy harvesting?

Yes, surface plasmons have been proposed as a means of enhancing light absorption in solar cells. By coupling light into surface plasmons, the absorption of light can be increased, leading to more efficient energy conversion.

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