scholarly journals On the accuracy of the WKB approximation in optical dielectric waveguides

1977 ◽  
Vol 9 (3) ◽  
pp. 223-232 ◽  
Author(s):  
A. H. Hartog ◽  
M. J. Adams
2003 ◽  
Vol 20 (3) ◽  
pp. 557 ◽  
Author(s):  
Alejandro Ortega-Moñux ◽  
J. Gonzalo Wangüemert-Pérez ◽  
Iñigo Molina-Fernández

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