Abstract

We correct a typo found in [Opt. Express 17, 3722-3731 (2009)]. The overall approach and results stay unchanged.

© 2010 OSA

In the article [1], a profile of the refractive-index contrast (relative to the background medium) for the graded-index microsphere was used for the numerical simulations. However, a typo appeared associated with the material parameters of the graded-index microsphere. This is corrected below.

Specifically, Eq. (1) provides the refractive-index contrast profile n(r) for the graded-index microsphere. This equation should read:

n(r) = εr,max     (εr,max1)ar
where a is the radius of the microsphere, r is the radial distance from the microsphere’s center, and εr,max is the maximum value of the dielectric permittivity contrast relative to the infinite background medium surrounding the microsphere.

εr,max is set to 2 for all of the numerical simulations in this paper. Thus, the refractive-index contrast n(r) properly has a maximum value of 2 at the center of the microsphere, and decreases in the radial direction to a minimum value of 1 at the microsphere surface. Before this correction, the maximum n(r) at the microsphere center in Ref [1]. was improperly given as 2.

The authors regret the typo. Please note, however, that it does not affect any of the numerical results presented in [1].

References and links

1. S.-C. Kong, A. Taflove, and V. Backman, “Quasi one-dimensional light beam generated by a graded-index microsphere,” Opt. Express 17(5), 3722–3731 (2009). [CrossRef]   [PubMed]  

References

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  1. S.-C. Kong, A. Taflove, and V. Backman, “Quasi one-dimensional light beam generated by a graded-index microsphere,” Opt. Express 17(5), 3722–3731 (2009).
    [CrossRef] [PubMed]

2009 (1)

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Equations (1)

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n ( r )   =   ε r , max       ( ε r , max 1 ) a r

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