title: Attenuated total reflection response to wavelength tuning of plasmon-induced transparency in a metal-insulator-metal structure.
abstract: We experimentally demonstrated a plasmon-induced transparency in a metal-insulator-metal (MIM) structure based on the attenuated total reflection (ATR) response. Here, the MIM waveguide (MIMWG) mode and the surface plasmon polariton (SPP) resonance mode acted as low- and high-Q resonance modes, respectively. The dependence of the resonance angles of SPP and MIMWG mode resonances on the incident wavelength differed, which allowed the coupling condition between the two modes to be tuned via the wavelength. When the resonance angles of the two modes coincided, the ATR response showed a symmetric plasmon-induced transparency spectrum; in contrast, when the resonance angles were detuned, the ATR exhibited a sharp asymmetric spectrum characteristic to off-resonance Fano interference.
authors.forename: Kouki
authors.initials: K
authors.lastname: Matsunaga
authors.forename: Takeshi
authors.initials: T
authors.lastname: Watanabe
authors.forename: Yoichiro
authors.initials: Y
authors.lastname: Neo
authors.forename: Takahiro
authors.initials: T
authors.lastname: Matsumoto
authors.forename: Makoto
authors.initials: M
authors.lastname: Tomita