Abstract
Enhanced optical transmission properties of a single subwavelength slit in a metallic film is theoretically studied by the Fabry-Perot-like formula. By using the analytical model based on a modal expansion method, reflection coefficient of electric field amplitude of surfaces at two slit ends is thoroughly analyzed and an empirical Fabry-Perot-like formula is derived. Good agreement between our formula and the experimental data is obtained. It is shown that a simple Fabry-Perot equivalent formula accounts for extraordinary transmission satisfactorily, explaining all of the details of the observed transmission spectra: it is demonstrated that the spacing of two adjacent resonant peaks in the spectra is linearly proportional to the slit width. Also it shows that the linewidth of these resonances increases with increase of the wavelength and is in linear proportion to the slit width. Our Fabry-Perot-like model can also easily predict on many features of the extraordinary transmission phenomenon.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: IEEE Transactions on Microwave Theory and Techniques
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
