Plasmon-induced transparency with detuned ultracompact Fabry-Perot resonators in integrated plasmonic devices

Institute of Sensors, Signals and Electrotechnics (SENSE), University of Southern Denmark, Niels Bohrs Alle 1, DK-5230 Odense M, Denmark.
Optics Express (Impact Factor: 3.49). 02/2011; 19(4):3251-7. DOI: 10.1364/OE.19.003251
Source: PubMed


We demonstrate the realization of on-chip plasmonic analogue of electromagnetically induced transparency (EIT) in integrated plasmonic devices using detuned Fabry-Perot resonators aperture-side-coupled to a metal-insulator-metal (MIM) waveguide, with the transmission peak occurring at the intermediate wavelength. Strong MIM mode confinement along with localized side-coupling allows one to realize subwavelength photonic components with EIT-like transmission. Numerical results show that MIM components exhibiting pronounced EIT-like spectra in near infrared with the footprint of < 0.15 μm2 and group index of ~26 can be designed.

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Available from: Zhanghua Han, Mar 09, 2015
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    • "It has attracted enormous attention due to its important applications in nanophotonics, quantum optics, and integrated photonic devices [2]. Recent studies have demonstrated that the PIT, a plasmonic analogue of EIT, can be realized in classical system due to the similar interference effects, such as MIM waveguide with detuned ultracompact Fabry-Perot (FP) resonators [3] and coupledresonator-induced transparency [4]. Since the PIT linewidth can be made extremely narrow and it features strong dispersion within the transparency window, and thus PIT phenomenon can find important applications in slow light devices [5]. "
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    ABSTRACT: We investigate the plasmon-induced transparency (PIT) effect in dual-stub-coupled metal-insulator-metal waveguide. The transmission line theory is employed to analyze the relationship between the transmission properties and geometrical parameters. It is found that by incorporating tunable refractive index materials with the proposed structure, a tunable PIT and slow light effect can be obtained in a constant stub separation design. The theoretical results show that a shift of 70 THz in the central wavelengths of transparency window can be obtained when the refractive index of the dielectric varies. In addition, the group index can be tuned from 24 to 36, which provides an effective method to adjust the slow light properties in the proposed waveguide. This letter opens up the possibility for the realization of tunable slow light devices in highly integrated optical circuits.
    IEEE Photonics Technology Letters 01/2015; 27(1):89-92. DOI:10.1109/LPT.2014.2362293 · 2.11 Impact Factor
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    • "In fact, EIT-like phenomenon has attracted great interest in recent years, which can be achieved in the dielectric siliconon-insulator (SOI) and photonic crystal (PC) waveguides [4– 11]. It can be also achieved in the plasmonic nano-structures, ranging from those realized in surface plasmon polariton waveguides [12] [13] [14] [15] [16] [17] [18] [19] [20] to metamaterials [21] [22] [23] [24]. Combining the EIT-like principle with LR-AHAS waveguides, the scalable (cascaded) coherent-interference-induced transparency (CIT) systems consisting of coupled and detuned DSB filters with a narrow bandwidth of 1.6 nm and abrupt phase dispersion are proposed and systematically demonstrated as the critical step to pave the new pathway of achieving bandwidth-compression , slow-light, and high-channel-count bandpass filters. "
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    ABSTRACT: A novel coherent-interference-induced transparency (CIT) system consisting of two coupled and detuned double-sided-branch (DSB) filters in a long-range air-hole assisted subwavelength (LR-AHAS) waveguide has been proposed and numerically demonstrated. The resonant wavelength, maximum transmittance, full width at half maximum (FWHM) and phase dispersion of the transparent window can be effectively tuned by adjusting the detuning and phase-shift between two coupled DSB filters, and FWHM can be suppressed to as small as 1.6 nm, which is much narrower than that of an individual resonator in an LR-AHAS waveguide. The FWHMs of 3.2 nm and 5.2 nm with the corresponding group refractive indices n g of 73 and 45 have been respectively demonstrated. In addition, multiple transparent peaks with an average bandwidth of 3.6 nm and high transmittance of 0.74 can be achieved by cascading more detuned DSB filters into the system. It provides a new approach to develop tunable high-channel-count bandpass filters and optical buffers based on the LR-AHAS waveguide platform for large-scale photonic integrations.
    Journal of Physics D Applied Physics 11/2014; 47(47). DOI:10.1088/0022-3727/47/47/475101 · 2.72 Impact Factor
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    • "2. Theoretical analysis: The novel resonator systems consists of four-ring resonators evanescently side coupled with a pair of signal waveguides. When light is coupled into all the ring resonators, the four rings form a Fabry-Pérot (FP)-like cavity [8] shown by the black dotted line in Fig. 1a. We repeated the CRIT effect with four rings by analogy with that of two rings. "
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    ABSTRACT: The coupled-resonator-induced-transparency (CRIT) phenomenon in a novel optical resonator system is experimentally demonstrated. The system is composed of a four-ring resonator with a 20 μm diameter on silicon, whose spectrum has a narrow transparency peak with low group velocity. The CRIT effect is observed in the optical coupled-resonator because of classical destructive interference. In this reported work, a CRIT resonance with a quality factor of 7.2 × 104 is demonstrated with the same cavity size and the power coupling of the system is 60%, which agree well with the theoretical analysis. Then, through and drop transmission spectra of the resonator coincide well with each other. Simultaneously, the detuning resonant wavelength can be controlled by changing the temperature.
    Micro & Nano Letters 10/2013; 8(10):619-622. DOI:10.1049/mnl.2013.0232 · 0.85 Impact Factor
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