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Spoof localized surface plasmons on ultrathin textured MIM ring resonator with enhanced resonances.

Zhou YJ, Xiao QX, Yang BJ - Sci Rep (2015)

Bottom Line: Quality factors of resonance peaks have become much larger and multipolar resonances modes can be easily observed on the textured MIM ring resonator excited by a microstrip line.We have shown that the fabricated resonator is sensitive to the variation of both the dielectric constant and the thickness of surrounding materials under test.The spoof plasmonic resonator can be used as key elements to provide many important device functionalities such as optical communications, signal processing, and spectral engineering in the plasmonic integration platform.

View Article: PubMed Central - PubMed

Affiliation: Key Laboratory of Specialty Fiber Optics and Optical Access Networks, Shanghai University, Shanghai 200072, China.

ABSTRACT
We numerically demonstrate that spoof localized surface plasmons (LSPs) resonant modes can be enhanced based on ultrathin corrugated metal-insulator-metal (MIM) ring resonator. Further enhancement of the LSPs modes has been achieved by incorporating an efficient and ease-of-integration exciting method. Quality factors of resonance peaks have become much larger and multipolar resonances modes can be easily observed on the textured MIM ring resonator excited by a microstrip line. Experimental results validate the high-efficiency excitation and resonance enhancements of spoof LSPs modes on the MIM ring resonator in the microwave frequencies. We have shown that the fabricated resonator is sensitive to the variation of both the dielectric constant and the thickness of surrounding materials under test. The spoof plasmonic resonator can be used as key elements to provide many important device functionalities such as optical communications, signal processing, and spectral engineering in the plasmonic integration platform.

No MeSH data available.


(a) Schematic diagram of the ultrathin textured metallic disk under the excitation of a plane wave. (b) The calculated ECS spectrum. The marked M1-M3 peaks correspond to dipole, quadrupole, and hexapole resonant modes, respectively. (c) Schematic diagram of the textured disk under the excitation of a monopole source. (d) The simulated near-field response, in which the marked red arrows from left to right indicate the M1–M5 resonance peaks, respectively.
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f1: (a) Schematic diagram of the ultrathin textured metallic disk under the excitation of a plane wave. (b) The calculated ECS spectrum. The marked M1-M3 peaks correspond to dipole, quadrupole, and hexapole resonant modes, respectively. (c) Schematic diagram of the textured disk under the excitation of a monopole source. (d) The simulated near-field response, in which the marked red arrows from left to right indicate the M1–M5 resonance peaks, respectively.

Mentions: First, we investigate the spoof LSPs supported by the ultrathin planar textured metallic disk depicted in Fig. 1(a)31, which is excited under a plane wave which is incident from the left to the right with a magnetic field perpendicular to the structure surface. The disk consists of an inner core of radius r surrounded by periodic array of grooves of pitch p0 = 2πR0/N (where N is the number of grooves). The groove height and groove width are h = R0 − r and a0 = 0.4p0. The disk is printed on the thin dielectric substrate (Rogers RO4350) whose thickness t and relative dielectric constant are 0.508 mm and 3.48, respectively. The parameters of the disk are set to be R0 = 5 mm, r = 2 mm, N = 60 (p0 = 0.52 mm), and a0 = 0.21 mm. The thickness of the metal is 0.018 mm. The calculated extinction cross section (ECS) spectrum is shown in Fig. 1(b), where three extinction peaks marked by M1-M3 can be observed. The disk is then excited by a monopole source and the probe is located at the opposite edge to the source and 0.5 mm above the textured disk, as illustrated in Fig. 1(c). The probed near-field response is displayed in Fig. 1(d), in which more resonance modes can be observed. In accordance with the previous study31, we can see that the higher resonant modes are difficult to excite by a plane wave, while the dipole resonance is very weak under the excitation of a monopole source.


Spoof localized surface plasmons on ultrathin textured MIM ring resonator with enhanced resonances.

Zhou YJ, Xiao QX, Yang BJ - Sci Rep (2015)

(a) Schematic diagram of the ultrathin textured metallic disk under the excitation of a plane wave. (b) The calculated ECS spectrum. The marked M1-M3 peaks correspond to dipole, quadrupole, and hexapole resonant modes, respectively. (c) Schematic diagram of the textured disk under the excitation of a monopole source. (d) The simulated near-field response, in which the marked red arrows from left to right indicate the M1–M5 resonance peaks, respectively.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4588594&req=5

f1: (a) Schematic diagram of the ultrathin textured metallic disk under the excitation of a plane wave. (b) The calculated ECS spectrum. The marked M1-M3 peaks correspond to dipole, quadrupole, and hexapole resonant modes, respectively. (c) Schematic diagram of the textured disk under the excitation of a monopole source. (d) The simulated near-field response, in which the marked red arrows from left to right indicate the M1–M5 resonance peaks, respectively.
Mentions: First, we investigate the spoof LSPs supported by the ultrathin planar textured metallic disk depicted in Fig. 1(a)31, which is excited under a plane wave which is incident from the left to the right with a magnetic field perpendicular to the structure surface. The disk consists of an inner core of radius r surrounded by periodic array of grooves of pitch p0 = 2πR0/N (where N is the number of grooves). The groove height and groove width are h = R0 − r and a0 = 0.4p0. The disk is printed on the thin dielectric substrate (Rogers RO4350) whose thickness t and relative dielectric constant are 0.508 mm and 3.48, respectively. The parameters of the disk are set to be R0 = 5 mm, r = 2 mm, N = 60 (p0 = 0.52 mm), and a0 = 0.21 mm. The thickness of the metal is 0.018 mm. The calculated extinction cross section (ECS) spectrum is shown in Fig. 1(b), where three extinction peaks marked by M1-M3 can be observed. The disk is then excited by a monopole source and the probe is located at the opposite edge to the source and 0.5 mm above the textured disk, as illustrated in Fig. 1(c). The probed near-field response is displayed in Fig. 1(d), in which more resonance modes can be observed. In accordance with the previous study31, we can see that the higher resonant modes are difficult to excite by a plane wave, while the dipole resonance is very weak under the excitation of a monopole source.

Bottom Line: Quality factors of resonance peaks have become much larger and multipolar resonances modes can be easily observed on the textured MIM ring resonator excited by a microstrip line.We have shown that the fabricated resonator is sensitive to the variation of both the dielectric constant and the thickness of surrounding materials under test.The spoof plasmonic resonator can be used as key elements to provide many important device functionalities such as optical communications, signal processing, and spectral engineering in the plasmonic integration platform.

View Article: PubMed Central - PubMed

Affiliation: Key Laboratory of Specialty Fiber Optics and Optical Access Networks, Shanghai University, Shanghai 200072, China.

ABSTRACT
We numerically demonstrate that spoof localized surface plasmons (LSPs) resonant modes can be enhanced based on ultrathin corrugated metal-insulator-metal (MIM) ring resonator. Further enhancement of the LSPs modes has been achieved by incorporating an efficient and ease-of-integration exciting method. Quality factors of resonance peaks have become much larger and multipolar resonances modes can be easily observed on the textured MIM ring resonator excited by a microstrip line. Experimental results validate the high-efficiency excitation and resonance enhancements of spoof LSPs modes on the MIM ring resonator in the microwave frequencies. We have shown that the fabricated resonator is sensitive to the variation of both the dielectric constant and the thickness of surrounding materials under test. The spoof plasmonic resonator can be used as key elements to provide many important device functionalities such as optical communications, signal processing, and spectral engineering in the plasmonic integration platform.

No MeSH data available.