title: Control of Fano asymmetry in plasmon induced transparency and its application to plasmonic waveguide modulator.
abstract: In this paper, we derive a governing equation for spectral asymmetry in electromagnetically induced transparency (EIT). From the key parameters of asymmetry factor - namely dark mode quality factor Q(d), and frequency separation between bright and dark mode Δω(bd) = (ω(b) - ω(d)) -, a logical pathway for the maximization of EIT asymmetry is identified. By taking the plasmonic metal-insulator-metal (MIM) waveguide as a platform, a plasmon-induced transparency (PIT) structure of tunable frequency separation Δω(bd) and dark mode quality factor Q(d) is suggested and analyzed. Compared to previous works on MIM-based plasmon modulators, an order of increase in the performance Fig. (12dB contrast at ~60% throughput) was achieved from the highly asymmetric, narrowband PIT spectra.
authors.affiliation: Photonic Systems Laboratory, School of EECS, Seoul National University, Seoul 151-744, South Korea.
authors.forename: Xianji
authors.initials: X
authors.lastname: Piao
authors.forename: Sunkyu
authors.initials: S
authors.lastname: Yu
authors.forename: Namkyoo
authors.initials: N
authors.lastname: Park
mesh_terms: D003198:Computer Simulation; D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008027:Light; D008962:Models, Theoretical; D012542:Scattering, Radiation; D020349:Surface Plasmon Resonance / Q000295:instrumentation* / Q000379:methods*