Physical mechanism of extraordinary electromagnetic transmission in dual-metallic grating structures

Chen, Cheng; Chen, Jing; Shi, Da-Jian; Wu, Qun; Ren, Fangfang; Xu, Ji; Fan, Ya-Xian; Ding, Jianping; Wang, Hui-Tian

doi:10.1103/physrevb.78.075406

Cited by 76 publications

(48 citation statements)

References 42 publications

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“…6(c)) which accords to the results of ref. [18] well. The surface plasmon resonance peak is modulated by the lateral displacement obviously; however, the localized waveguide resonance peak is nearly independent on it.…”

Section: Resultsmentioning

confidence: 96%

“…It is until quite recently when studies of multilayer hole and slit arrays have gained more attention. Transmission through double-layer smooth surfaces [14,15], hole and slit arrays [15][16][17][18] with different shapes and dimensions has been investigated. These systems are always consisted of two identical single layers; however, double-layer structures with slit width of one layer different from that of the other layer are seldom investigated.…”

Section: Introductionmentioning

confidence: 99%

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The extraordinary optical transmission through double-layer gold slit arrays

Xie¹,

Li²,

Fu³

et al. 2010

Optics Communications

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Section: Resultsmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

The extraordinary optical transmission through double-layer gold slit arrays

Xie¹,

Li²,

Fu³

et al. 2010

Optics Communications

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“…Here, the spectrum for the non-modulated structure of r = 0 should be interpreted in terms of FabryPerot-like waveguide mode resonances, 6,7 as investigated for similar double-layered structures in previous works. 9,10 The transmission band with twin peaks at around 0.07 and 0.11 THz should be related to what are called the half-wavelength and one-wavelength resonances, while the peaks at around 0.22 and 0.34 THz should correspond to the 3/2-wavelength and 5/2-wavelength resonances, respectively. 11 As discussed in previous work, 12 resonance wavelengths are generally different from the values expected to confine fields inside real cavity lengths.…”

confidence: 99%

Remarkable transmission characteristics of optical waves through modulated double-layered metallic slit arrays

et al. 2012

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“…In 2000 the subwavelength dual metallic grating (DMG) structures were proposed by Stephen Chou's group for planar polarizer applications [25]. The success of these experiments inspired interests in these structures and, consequently, DMG optical properties as well as the surface plasmon behaviors were studied [26][27][28][29][30][31][32]. In 1998 Kahl and Voges [33] reported a SERS study on silver DMG structures and suggested that an optimum grating height should be used for reproducible SERS measurements in backscattering geometry [34].…”

mentioning

confidence: 98%

Surface-enhanced Raman scattering on dual-layer metallic grating structures

et al. 2010

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Dual-layer Metallic grating (DMG) structures as surface-enhanced Raman scattering (SERS) substrates are studied using benzenethiol as the probe analyte. The DMG structure consists of a SiO 2 grating and 100-nm-thick gold coating layers. An enhancement factor of 10 5 is achieved by optimizing the SiO 2 grating height within the range from 165 to 550 nm. The enhancement factor dependence on the SiO 2 grating height is due to the surface plasmon excitation, which is dependent on the polarization of the incident light, and confirmed by finite difference time domain simulations. This study demonstrates the advantages of high uniformity, reproducibility and sensitivity in the DMG structures for SERS applications. surface-enhanced Raman scattering, surface plasmon, dual-layer metallic grating Citation: Guan Z Q, Håkanson U, Anttu N, et al. Surface-enhanced Raman scattering on dual-layer metallic grating structures.Surface-enhanced Raman scattering (SERS) has been widely studied in recent decades due to the high chemical specificity of vibrational spectra and increased detection efficiency by huge enhancement factors. It has been recognized that the origin of the enhancement in SERS is coming from electromagnetic (EM) and chemical components [1-3]. The EM enhancement coming from the excitation of surface plasmons (SPs) in noble or transition metals is usually several orders of magnitude higher than the chemical enhancement, and thus it is the main contributor to the SERS enhancement for most cases [4][5][6][7]. SPs are the collective oscillations of the electron gas in a metal. The excitation of SPs in metal nanostructures can produce an enhanced optical field, which is the physical basis for surface-enhanced spectroscopy, particularly for SERS. A volume where the electromagnetic field is strongly enhanced is usually called a "hot spot". When the molecules are located in the "hot spots", the Raman scattering intensity will be significantly magnified, which largely improves the sensitivity of Raman detection even to a single molecule level [8,9]. The high sensitivity and fingerprint property make SERS a powerful technique for chemical-and bio-sensing applications [10][11][12]. Recently, SERS was employed in the diagnosis and therapy of diseases [13][14][15].In the studies of SERS, different substrates have been developed, of which colloidal metal nanoparticles are widely used due to their large SERS enhancement and easy preparation. Single molecule SERS experiments were achieved in colloidal nanoparticle systems. In addition, the electromagnetic enhancement contribution to SERS was also first clearly elucidated from both experiment and theory in Ag nanoparticle aggregates [5,16], in which the gaps between the nanoparticles are "hot spots" for SERS due to the strong electromagnetic coupling between adjacent particles. However, the plasmonic coupling is often sensitive to the polarization of the excitation light, so the SERS intensity in metal nanostructures is usually polarization dependent [17,18]. Our recent work [6] sho...

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Physical mechanism of extraordinary electromagnetic transmission in dual-metallic grating structures

Cited by 76 publications

References 42 publications

The extraordinary optical transmission through double-layer gold slit arrays

The extraordinary optical transmission through double-layer gold slit arrays

Remarkable transmission characteristics of optical waves through modulated double-layered metallic slit arrays

Surface-enhanced Raman scattering on dual-layer metallic grating structures

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