Optical properties of one-dimensional metal–dielectric photonic band-gap structures with low index dielectrics

Owens, Daniel; Fuentes-Hernández, Canek; Kippelen, Bernard

doi:10.1016/j.tsf.2008.10.119

Cited by 12 publications

(11 citation statements)

References 20 publications

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“…As is well known, it is challenging to deposit (or measure the thickness of) such thin Ag films with an accuracy better than a few nanometers. Moreover, while we approximately verified the Ag optical constants model, the precise values are expected to vary with the film thickness [17,23].…”

Section: Resultssupporting

confidence: 54%

“…However, the transmittance in the passband is well below the theoretical curve. This discrepancy is partly attributable to the oxidation of the Ag layers during the deposition of TiO 2 , and the formation of an Ag-oxide layer at each interface [16,17]. We observed similar, suboptimal transparency for several other Ag∕TiO 2 -based multilayer samples.…”

Section: Experimental and Simulation Detailsmentioning

confidence: 68%

“…The comments regarding layer thickness errors and uncertainty in the Ag optical constants also apply to this sample. Nevertheless, it is interesting that some of the benefits of a high-index dielectric [7,13,17] can be obtained by replacing only the SiO 2 "AR layers" (and not the intermetal spacer layers) with TiO 2 . This illustrates the impedance matching issues discussed above, and might be a useful compromise for some applications.…”

Section: Resultsmentioning

confidence: 99%

“…Low-index spacer layers are expected to provide simpler fabrication options and improved long-term stability but result in lower transparency. Owens et al [17] showed that the transparency band can be enhanced by using an aperiodic, numerically optimized stack. Here, we consider periodic Ag∕SiO 2based multilayers, and show that appropriate termination of the stack can reduce the admittance mismatch with the external media, and thereby enhance the optical properties (such as peak transmittance and transparency bandwidth).…”

Section: Introductionmentioning

confidence: 99%

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Transparency and stability of Ag-based metal–dielectric multilayers

et al. 2013

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We fabricated and tested periodic metal (Ag)-dielectric (SiO2 or TiO2) multilayers with transparency bands in the visible range. For samples with Ag-TiO2 interfaces, the optical properties exhibited relatively poor predictability, likely due to oxidation of the Ag layers. Ag/SiO2-based multilayers were found to be more predictable and stable, but the relatively low refractive index of SiO2 limits their inherent transparency and pass-band bandwidth. We show that termination of the multilayer with a single high-index layer reduces the admittance mismatch with the ambient media, and thus improves the properties of the transparency band.

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Section: Resultssupporting

confidence: 54%

Section: Experimental and Simulation Detailsmentioning

confidence: 68%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Transparency and stability of Ag-based metal–dielectric multilayers

et al. 2013

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“…Metal-dielectric photonic band gap structures [3,4] are usually used to excite SPPs and LSPs. They have many extraordinary optical properties, such as surface enhanced spectroscopy [5,6], enhanced transmission [7−9], sensitive bio-sensing [10,11], negative refractive index [12−14], double negative materials [15], and high resolution imaging [16,17].…”

Section: Introductionmentioning

confidence: 99%

Electromagnetic resonant properties of metal-dielectric-metal (MDM) cylindrical microcavities

Heng

Wang

2017

Photonic Sens

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Optical metamaterials can concentrate light into extremely tiny volumes to enhance their interaction with quantum objects. In this paper, a cylindrical microcavity based on the Au-dielectric-Au sandwiched structure is proposed. Numerical study shows that the cylindrical microcavity has the strong ability of localizing light and confining 10 3 --10 4 -fold enhancement of the electromagnetic energy density, which contains the most energy of the incoming light. The enhancement factor of energy density G inside the cavity shows the regularities as the change in the thickness of the dielectric slab, dielectric constant, and the radius of gold disk. At the normal incidence of electromagnetic radiation, the obtained reflection spectra operate in the range from 4.8 μm to 6 μm and with the absorption efficiency C (C=1-R min ), which can reach 99% by optimizing the structure's geometry parameters, and the dielectric constant. Due to the symmetry of the cylindrical microcavities, this structure is insensitive to the polarization of the incident wave. The proposed optical metamaterials will have potential applications in the surface enhanced spectroscopy, new plasmonic detectors, bio-sensing, solar cells, etc.

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