eprintid: 10192730
rev_number: 9
eprint_status: archive
userid: 699
dir: disk0/10/19/27/30
datestamp: 2024-05-24 16:20:25
lastmod: 2024-05-24 16:20:25
status_changed: 2024-05-24 16:20:25
type: article
metadata_visibility: show
sword_depositor: 699
creators_name: Perea-Puente, Sinuhé
creators_name: Rodríguez-Fortuño, Francisco J
title: Dependence of evanescent wave polarization on the losses of guided optical modes
ispublished: pub
divisions: UCL
divisions: B04
divisions: C05
divisions: F48
note: This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions.
abstract: Spin-momentum locking of evanescent waves describes the relationship between the propagation constant of an evanescent mode and the polarization of its electromagnetic field, giving rise to applications in light nanorouting and polarimetry among many others. The use of complex numbers in physics is a powerful representation in areas, such as quantum mechanics or electromagnetism; it is well known that a lossy waveguide can be modeled with the addition of an imaginary part to the propagation constant. Here we explore how these losses are entangled with the polarization of the associated evanescent tails for the waveguide, revealing a well-defined mapping between waveguide losses and the Poincaré sphere of polarizations in what could be understood as a “polarization-loss locking” of evanescent waves. We analyze the implications for near-field directional coupling of sources to waveguides as optimized dipoles must take into account the losses for a perfectly unidirectional excitation. We also reveal the potential advantage of calculating the angular spectrum of a source defined in a complex rather than the traditionally purely real transverse wave-vector space formalism.
date: 2021-08-15
date_type: published
publisher: American Physical Society (APS)
official_url: https://doi.org/10.1103/physrevb.104.085417
oa_status: green
full_text_type: pub
language: eng
primo: open
primo_central: open_green
verified: verified_manual
elements_id: 2278106
doi: 10.1103/physrevb.104.085417
lyricists_name: Perea Puente, Sinuhe
lyricists_id: SPERE36
actors_name: Perea Puente, Sinuhe
actors_id: SPERE36
actors_role: owner
full_text_status: public
publication: Physical Review B
volume: 104
number: 8
article_number: 085417
issn: 2469-9950
citation:        Perea-Puente, Sinuhé;    Rodríguez-Fortuño, Francisco J;      (2021)    Dependence of evanescent wave polarization on the losses of guided optical modes.                   Physical Review B , 104  (8)    , Article 085417.  10.1103/physrevb.104.085417 <https://doi.org/10.1103/physrevb.104.085417>.       Green open access   
 
document_url: https://discovery.ucl.ac.uk/id/eprint/10192730/1/Perea%20Puente_PhysRevB.104.085417.pdf