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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Vol. 30, Iss. 2 — Jan. 15, 2005
  • pp: 153–155

Diffraction response of colloidal crystals: effect of numerical aperture

Yun-Ju Lee, Stephanie A. Pruzinsky, and Paul V. Braun  »View Author Affiliations


Optics Letters, Vol. 30, Issue 2, pp. 153-155 (2005)
http://dx.doi.org/10.1364/OL.30.000153


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Abstract

We present a quantitative experimental and theoretical study of the effect of numerical aperture (NA) on the Bragg diffraction from a dry polystyrene colloidal crystal. The diffraction peak parameters changed noticeably as the NA was increased from 0.017 to 0.5. The diffraction wavelength blueshifted 1.4% from 584 to 576 nm, and the normalized full width at half-maximum increased from 6.2% to 7.0%. These shifts occurred primarily for NA > 0.3 and agreed qualitatively with results predicted by a layered Korringa-Kohn-Rostoker method. Thus, by using focusing optics with NAs below 0.3, the diffraction response of low-photonic-strength mesostructures may be compared with normal-incidence experimental and theoretical data.

© 2005 Optical Society of America

OCIS Codes
(230.3990) Optical devices : Micro-optical devices
(300.6550) Spectroscopy : Spectroscopy, visible

Citation
Yun-Ju Lee, Stephanie A. Pruzinsky, and Paul V. Braun, "Diffraction response of colloidal crystals: effect of numerical aperture," Opt. Lett. 30, 153-155 (2005)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-30-2-153

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