Formation mechanism and modulation of electromagnetically induced transparency-like transmission in side-coupled structures

Abstract

Based on Fabry model and finite-different time-domain (FDTD) method, the plasmonic structure composed of a metal-insulator-metal (MIM) bus waveguide and a side-coupled resonator was investigated. It is found that the transmission features can be regulated by the cavity width and coupling distance. Electromagnetically induced transparency (EIT)-like transmission can be excited by adding an identical resonator on the pre-existing structure. Combining the foregoing theoretical analysis with coupled mode theory (CMT), the formation process of the EIT-like transmission was detailedly analyzed. EIT-like transmission can also be excited in plasmonic structure with two detuned resonators. By altering the structure parameters, the transparency window can be purposefully modulated. With the merits of compact structure and simplicity in fabrication, the proposed structures may have a broad prospect of applications in highly integrated optical circuits.

Keywords

metal-insulator-metal (MIM) waveguide / side-coupled resonator / electromagnetically induced transpareucy (EIT)-like transmission / formation mechanism

References

[1] LUH, LIUX-m, MAODong. Induced transparency in nanoscale plasmonic resonator systems [J]. Opt Lett, 2011, 36(16): 3233-3235

[2] LUH, LIUX-m, MAODong. Plasmonic analog of electromagnetically induced transparency in multi-nanoresonator-coupled waveguide systems [J]. Phys Rev A, 2012, 85(5): 053803

[3] XUQ-f, SANDHUS, POVINELLIM L. Experimental realization of an on-chip all-optical analogue to electromagnetically induced transparency [J]. Phys Rev Lett, 2006, 96(12): 123901

[4] TOTSUKAK, KOBAYASHIN, TOMITAM. Slow light in coupled-resonator-induced transparency [J]. Phys Rev Lett, 2007, 98(21): 213904

[5] YANGX D, YUM, KWONGD L. All-optical analog to electromagnetically induced transparency in multiple coupled photonic crystal cavities [J]. Phys Rev Lett, 2009, 102(17): 173902

[6] BARNESW L, DEREUXA, EBBESENT W. Surface plasmon subwavelength optics [J]. Nature, 2003, 424(6950): 824-830

[7] ZHANGQ, HUANGX-g, LINX-shi. A subwavelength coupler-type MIM optical filter [J]. Opt Express, 2009, 17(9): 7549-7554

[8] GRAMOTNEVD K, BOZHEVOLNYIS I. Plasmonics beyond the diffraction limit [J]. Nat Photonics, 2010, 4(2): 83-91

[9] MATSUZAKIY, OKAMOTOT, HARAGUCHIM, FUKUIM. Characteristics of gap plasmon waveguide with stub structures [J]. Opt Express, 2008, 16(21): 16314-16325

[10] KEKATPURER D, BARNARDE S. CAI Wen-shan. Phase-coupled plasmon-induced transparency [J]. Phys Rev Lett, 2010, 104(24): 243902

[11] HUANGY, MINC-j, VERONISG. Subwavelength slow-light waveguides based on a plasmonic analogue of electromagnetically induced transparency [J]. Appl Phys Lett, 2011, 99(14): 143117

[12] HANZ-h, vanV, HERMANW N. Aperture-coupled MIM plasmonic ring resonators with sub-diffraction modal volumes [J]. Opt Express, 2009, 17(15): 12678

[13] GUOY-h, YANL-s, PANWei. Electromagnetically induced transparency (EIT)-like transmission in side-coupled complementary split-ring resonators [J]. Opt Express, 2012, 20(22): 24348-24354

[14] WANGG-x, LUH, LIUX-ming. Dispersionless slow light in MIM waveguide based on a plasmonic analogue of electromagnetically induce transparency [J]. Opt Express, 2012, 20(19): 20902-20907

[15] LUH, LIUX-m, MAODong. Tunable band-pass plasmonic waveguide filters with nanodisk resonators [J]. Opt Express, 2010, 18(17): 17922-17927

[16] WANGG-x, LUH, LIUX-ming. Tunable multi-channel wavelength demultiplexer based on MIM plasmonic nanodisk resonators at telecommunication regime [J]. Opt Express, 2011, 19(4): 3513-3518

[17] CAOG-t, LIH-j, ZhANS-ping. Uniform theoretical description of plasmon-induced transparency in plasmonic stub waveguide [J]. Opt Lett, 2014, 39(2): 216-219

[18] HANZ-h, BOZHEVOLNYIS I. Plasmon-induced transparency with detuned ultracompact Fabry-Perot resonators in integrated plasmonic devices [J]. Opt Express, 2011, 19(4): 3251-3257

[19] HAUSH A, HUANGW PCoupled-model theory [J], 1991, 19(10): 1505-1518

[20] LIQ, WANGT, SUY-kai. Coupled mode theory analysis of mode-splitting in coupled cavity system [J]. Opt Express, 2010, 18(8): 8367-8382

[21] WANGA-h, CAIJ-ju. Modeling of radiative properties of metallic microscale rough surface [J]. Journal of Central South University, 2012, 19(4): 1482-1487

[22] ECONOMOUE N. Surface plasmons in thin films [J]. Phys Rev, 1969, 182(2): 539-554

[23] ORDALM A, LONGL L, BELLR JOptical properties of the metals Al, Co, Cu, Au, Fe, Pb, Ni, Pd, Pt, Ag, Ti, and W in the infrared and far infrared [J], 1983, 22(7): 1099

[24] BABAT. Slow light in photonic crystal [J]. Nat Photonics, 2008, 2(8): 465-473