Article History
Received: 17 March 2017
Accepted: 16 August 2017
First Online: 18 October 2017
Change Date: 15 January 2018
Change Type: Correction
Change Details: The original version of this Article contained an error in Equation 3b. A ‘ + ’ sign incorrectly appeared instead of a ‘–’ sign in the denominator of the right-hand side of the equation and incorrectly read:$$\left( {\chi _1^{\left( 3 \right)} + i\chi _2^{\left( 3 \right)}} \right) = \left( {\frac{{\kappa ^2}}{{\kappa ^2 + \left( {\Delta k_z} \right)^2}}\chi ^{\left( 3 \right)} + i\frac{{\kappa \Delta k_z}}{{\kappa ^2 + \left( {\Delta k_z} \right)^2}}\chi ^{\left( 3 \right)}} \right) = \frac{\kappa }{{\kappa + i\Delta k_z}}\chi ^{\left( 3 \right)}$$χ13+iχ23=κ2κ2+Δkz2χ3+iκΔkzκ2+Δkz2χ3=κκ+iΔkzχ3
Competing interests
: The authors declare no competing financial interests.