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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 4 — Feb. 25, 2013
  • pp: 3941–3945

Negative experimental evidence for magneto-orbital dichroism

Renaud Mathevet, Bruno Viaris de Lesegno, Laurence Pruvost, and Geert L. J. A. Rikken  »View Author Affiliations


Optics Express, Vol. 21, Issue 4, pp. 3941-3945 (2013)
http://dx.doi.org/10.1364/OE.21.003941


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Abstract

A light beam can carry both spin angular momentum (SAM) and orbital angular momentum (OAM). SAM is commonly evidenced by circular dichroism (CD) experiments i. e. differential absorption of left and right-handed circularly polarized light. Recent experiments, supported by theoretical work, indicate that the corresponding effect with OAM instead of SAM is not observed in chiral matter. Isotropic materials can show CD when subjected to a magnetic field (MCD). We report a set of experiments, under well defined conditions, searching for magnetic orbital dichroism (MOD), differential absorption of light as a function of the sign of its OAM. We experimentally demonstrate that this effect, if any, is smaller than a few 10−4 of MCD for the Nd:YAG 4I9/24F5/2 transition. This transition is essentially of electric dipole nature. We give an intuitive argument suggesting that the lowest order of light matter interaction leading to MOD is the electric quadrupole term.

© 2012 OSA

OCIS Codes
(050.1930) Diffraction and gratings : Dichroism
(260.5430) Physical optics : Polarization
(050.4865) Diffraction and gratings : Optical vortices

ToC Category:
Physical Optics

History
Original Manuscript: July 19, 2012
Revised Manuscript: August 6, 2012
Manuscript Accepted: August 6, 2012
Published: February 11, 2013

Citation
Renaud Mathevet, Bruno Viaris de Lesegno, Laurence Pruvost, and Geert L. J. A. Rikken, "Negative experimental evidence for magneto-orbital dichroism," Opt. Express 21, 3941-3945 (2013)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-21-4-3941


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