Exalted transmission through a periodic structure of metallic C-shaped apertures sub-wavelength

Abstract

International audience<span style="left: 122.6px; top: 411.588px; font-size: 20px; font-family: serif; transform: scaleX(1.05058);"&gtThe objective of this work is to study the properties of the t</span&gt<span style="left: 620.8px; top: 411.588px; font-size: 20px; font-family: serif; transform: scaleX(1.02406);"&gtransmission through a periodic </span&gt<span style="left: 118px; top: 434.588px; font-size: 20px; font-family: serif; transform: scaleX(1.00073);"&gtarray</span&gt<span style="left: 164.2px; top: 434.588px; font-size: 20px; font-family: serif; transform: scaleX(1.00926);"&gtof the sub</span&gt<span style="left: 243.8px; top: 434.588px; font-size: 20px; font-family: serif;"&gt-</span&gt<span style="left: 250.6px; top: 434.588px; font-size: 20px; font-family: serif; transform: scaleX(1.00027);"&gtwavelength</span&gt<span style="left: 348.2px; top: 434.588px; font-size: 20px; font-family: serif;"&gtC</span&gt<span style="left: 361.6px; top: 434.588px; font-size: 20px; font-family: serif;"&gt-</span&gt<span style="left: 368.2px; top: 434.588px; font-size: 20px; font-family: serif; transform: scaleX(1.00027);"&gtshaped</span&gt<span style="left: 429px; top: 434.588px; font-size: 20px; font-family: serif; transform: scaleX(1.00379);"&gtapertures engraved</span&gt<span style="left: 586.4px; top: 434.588px; font-size: 20px; font-family: serif; transform: scaleX(1.01037);"&gtin a metal film</span&gt<span style="left: 710.2px; top: 434.588px; font-size: 20px; font-family: serif; transform: scaleX(1.00306);"&gt(see figure</span&gt<span style="left: 800.6px; top: 434.588px; font-size: 20px; font-family: serif;"&gt1</span&gt<span style="left: 810.6px; top: 434.588px; font-size: 20px; font-family: serif;"&gt-</span&gt<span style="left: 817.4px; top: 434.588px; font-size: 20px; font-family: serif; transform: scaleX(1.00097);"&gta)</span&gt<span style="left: 832.8px; top: 434.588px; font-size: 20px; font-family: serif; transform: scaleX(1);"&gt. </span&gt<span style="left: 842.8px; top: 434.588px; font-size: 20px; font-family: serif; transform: scaleX(1);"&gtThe </span&gt<span style="left: 118px; top: 457.588px; font-size: 20px; font-family: serif; transform: scaleX(1.05196);"&gtnumerical study of this type of structure is realized by the Finite Difference Time Domain </span&gt<span style="left: 118px; top: 480.588px; font-size: 20px; font-family: serif; transform: scaleX(1.00816);"&gt(FDTD), which is a house code developed </span&gt<span style="left: 464.4px; top: 480.588px; font-size: 20px; font-family: serif; transform: scaleX(1.00853);"&gtwithin our team. The annular C</span&gt<span style="left: 717.6px; top: 480.588px; font-size: 20px; font-family: serif;"&gt-</span&gt<span style="left: 724.4px; top: 480.588px; font-size: 20px; font-family: serif; transform: scaleX(1.00497);"&gtshaped structure is </span&gt<span style="left: 118px; top: 503.588px; font-size: 20px; font-family: serif; transform: scaleX(0.978441);"&gtcompact and has the advantage of having the fundamental mode TE</span&gt<span style="left: 698.194px; top: 512.062px; font-size: 13.4px; font-family: serif; transform: scaleX(1);"&gt10</span&gt<span style="left: 720.4px; top: 503.588px; font-size: 20px; font-family: serif; transform: scaleX(0.975432);"&gt(see figure 1</span&gt<span style="left: 827.6px; top: 503.588px; font-size: 20px; font-family: serif;"&gt-</span&gt<span style="left: 834.2px; top: 503.588px; font-size: 20px; font-family: serif; transform: scaleX(1.00046);"&gtb) </span&gt<span style="left: 859.8px; top: 503.588px; font-size: 20px; font-family: serif; transform: scaleX(0.988417);"&gtat </span&gt<span style="left: 118px; top: 526.588px; font-size: 20px; font-family: serif; transform: scaleX(1.00049);"&gtwavelengths much greater than those of the fundamental modes of the other guiding structures </span&gt<span style="left: 118px; top: 549.588px; font-size: 20px; font-family: serif; transform: scaleX(1.00773);"&gtsuch as the coaxial cavity</span&gt<span style="left: 328.8px; top: 549.588px; font-size: 20px; font-family: serif; transform: scaleX(1.00901);"&gt[1], </span&gt<span style="left: 362.8px; top: 549.588px; font-size: 20px; font-family: serif;"&gtr</span&gt<span style="left: 369.4px; top: 549.588px; font-size: 20px; font-family: serif; transform: scaleX(1.0006);"&gtectangular</span&gt<span style="left: 458px; top: 549.588px; font-size: 20px; font-family: serif; transform: scaleX(1.00086);"&gt[2]</span&gt<span style="left: 481.6px; top: 549.588px; font-size: 20px; font-family: serif; transform: scaleX(1.00231);"&gt, etc. </span&gt<span style="left: 525.4px; top: 549.588px; font-size: 20px; font-family: serif; transform: scaleX(1.00556);"&gtand while moving away from Rayleigh and </span&gt<span style="left: 118px; top: 572.588px; font-size: 20px; font-family: serif; transform: scaleX(1.00368);"&gtplasmonic anomalies. </span&gt<span style="left: 307.6px; top: 572.588px; font-size: 20px; font-family: serif; transform: scaleX(1.01057);"&gtIn addition to its compactness, this structure provides a breaking </span&gt<span style="left: 118px; top: 595.588px; font-size: 20px; font-family: serif; transform: scaleX(1.00698);"&gtsymmetry and therefore it is promising for the realization of metamaterials exhibiting original </span&gt<span style="left: 118px; top: 618.588px; font-size: 20px; font-family: serif; transform: scaleX(1.00027);"&gtprop</span&gt<span style="left: 154.6px; top: 618.588px; font-size: 20px; font-family: serif; transform: scaleX(0.982947);"&gterties such as negative refractive index or artificial anisotropy [</span&gt<span style="left: 696px; top: 618.588px; font-size: 20px; font-family: serif; transform: scaleX(1.0006);"&gt2]</span&gt<span style="left: 721.8px; top: 618.588px; font-size: 20px; font-family: serif; transform: scaleX(1.00039);"&gtwit</span&gt<span style="left: 747.4px; top: 618.588px; font-size: 20px; font-family: serif; transform: scaleX(0.992953);"&gth extraordinary </span&gt<span style="left: 118px; top: 642.588px; font-size: 20px; font-family: serif; transform: scaleX(0.998477);"&gtbirefringence (</span&gt<span style="left: 236.2px; top: 645.41px; font-size: 20px; font-family: sans-serif;"&gt∆</span&gt<span style="left: 247.4px; top: 642.588px; font-size: 20px; font-family: serif; transform: scaleX(1.00008);"&gtn= 0.75 </span&gt<span style="left: 313.6px; top: 642.588px; font-size: 20px; font-family: serif;"&gt[</span&gt<span style="left: 320.6px; top: 642.588px; font-size: 20px; font-family: serif;"&gt3</span&gt<span style="left: 330.6px; top: 642.588px; font-size: 20px; font-family: serif; transform: scaleX(1.00109);"&gt])</span&g