Partial spatial coherence and polarization in purely evanescent electromagnetic fields

Andreas Norrman; Tero Setälä; Ari T. Friberg

doi:10.1109/WIO.2010.5582497

Partial spatial coherence and polarization in purely evanescent electromagnetic fields

Andreas Norrman^*
, Tero Setälä
, Ari T. Friberg

^*Corresponding author for this work

Department of Applied Physics

Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

Abstract

We study the partial spatial coherence and partial three-dimensional polarization in electromagnetic fields consisting of a superposition of evanescent plane waves generated in total internal reflection. In particular, we investigate the coherence length in such fields, and demonstrate that it can be shorter than the wavelength of the propagating field above the dielectric surface. The higher the refractive-index contrast at the interface is, and the closer to the surface the field is considered, the shorter is the coherence length. Physical explanation for this behavior analogous to the generation of incoherent light in a multimode gas laser is provided. We also assess the degree of polarization in evanescent fields by using a recent threedimensional formulation.

Original language	English
Title of host publication	2010 9th Euro-American Workshop on Information Optics, WIO 2010
DOIs	https://doi.org/10.1109/WIO.2010.5582497
Publication status	Published - 2010
MoE publication type	A4 Conference publication
Event	Euro-American Workshop on Information Optics - Helsinki, Finland Duration: 12 Jul 2010 → 16 Jul 2010 Conference number: 9

Publication series

Name	Euro-American Workshop on Information Optics
ISSN (Print)	2164-8603

Workshop

Workshop	Euro-American Workshop on Information Optics
Abbreviated title	WIO
Country/Territory	Finland
City	Helsinki
Period	12/07/2010 → 16/07/2010

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10.1109/WIO.2010.5582497

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title = "Partial spatial coherence and polarization in purely evanescent electromagnetic fields",

abstract = "We study the partial spatial coherence and partial three-dimensional polarization in electromagnetic fields consisting of a superposition of evanescent plane waves generated in total internal reflection. In particular, we investigate the coherence length in such fields, and demonstrate that it can be shorter than the wavelength of the propagating field above the dielectric surface. The higher the refractive-index contrast at the interface is, and the closer to the surface the field is considered, the shorter is the coherence length. Physical explanation for this behavior analogous to the generation of incoherent light in a multimode gas laser is provided. We also assess the degree of polarization in evanescent fields by using a recent threedimensional formulation.",

author = "Andreas Norrman and Tero Set{\"a}l{\"a} and Friberg, \{Ari T.\}",

year = "2010",

doi = "10.1109/WIO.2010.5582497",

language = "English",

isbn = "9781424482276",

series = "Euro-American Workshop on Information Optics",

booktitle = "2010 9th Euro-American Workshop on Information Optics, WIO 2010",

note = "Euro-American Workshop on Information Optics, WIO ; Conference date: 12-07-2010 Through 16-07-2010",

}

Norrman, A, Setälä, T & Friberg, AT 2010, Partial spatial coherence and polarization in purely evanescent electromagnetic fields. in 2010 9th Euro-American Workshop on Information Optics, WIO 2010., 5582497, Euro-American Workshop on Information Optics, Euro-American Workshop on Information Optics, Helsinki, Finland, 12/07/2010. https://doi.org/10.1109/WIO.2010.5582497

Partial spatial coherence and polarization in purely evanescent electromagnetic fields. / Norrman, Andreas; Setälä, Tero; Friberg, Ari T.
2010 9th Euro-American Workshop on Information Optics, WIO 2010. 2010. 5582497 (Euro-American Workshop on Information Optics).

Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

TY - GEN

T1 - Partial spatial coherence and polarization in purely evanescent electromagnetic fields

AU - Norrman, Andreas

AU - Setälä, Tero

AU - Friberg, Ari T.

N1 - Conference code: 9

PY - 2010

Y1 - 2010

N2 - We study the partial spatial coherence and partial three-dimensional polarization in electromagnetic fields consisting of a superposition of evanescent plane waves generated in total internal reflection. In particular, we investigate the coherence length in such fields, and demonstrate that it can be shorter than the wavelength of the propagating field above the dielectric surface. The higher the refractive-index contrast at the interface is, and the closer to the surface the field is considered, the shorter is the coherence length. Physical explanation for this behavior analogous to the generation of incoherent light in a multimode gas laser is provided. We also assess the degree of polarization in evanescent fields by using a recent threedimensional formulation.

AB - We study the partial spatial coherence and partial three-dimensional polarization in electromagnetic fields consisting of a superposition of evanescent plane waves generated in total internal reflection. In particular, we investigate the coherence length in such fields, and demonstrate that it can be shorter than the wavelength of the propagating field above the dielectric surface. The higher the refractive-index contrast at the interface is, and the closer to the surface the field is considered, the shorter is the coherence length. Physical explanation for this behavior analogous to the generation of incoherent light in a multimode gas laser is provided. We also assess the degree of polarization in evanescent fields by using a recent threedimensional formulation.

UR - https://www.scopus.com/pages/publications/78149460180

U2 - 10.1109/WIO.2010.5582497

DO - 10.1109/WIO.2010.5582497

M3 - Conference article in proceedings

AN - SCOPUS:78149460180

SN - 9781424482276

T3 - Euro-American Workshop on Information Optics

BT - 2010 9th Euro-American Workshop on Information Optics, WIO 2010

T2 - Euro-American Workshop on Information Optics

Y2 - 12 July 2010 through 16 July 2010

ER -

Partial spatial coherence and polarization in purely evanescent electromagnetic fields

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