Investigation on Spectral Properties of Metal–Insulator–Metal Film Stack with Rectangular Hole Arrays

Gou, Yuchun; Xuan, Yimin; Han, Yuge

doi:10.1007/s10765-011-0960-8

Cited by 14 publications

(10 citation statements)

References 35 publications

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“…Interestingly, the HEHB mode has a propagation length (1/Im( k x )) of tens of microns in the near infrared. [ 25,26,28,29 ] Due to the high RI of Si 3 N 4 ( n 3 = 2.24), in our system the fi eld is especially strong between the fi lms for the LEHB mode, while it is not as strong in the semiinfi nite media for the HEHB mode as it could be for lower n 3 . [ 27 ] On the contrary, the LEHB mode maintains a relatively high damping throughout the whole frequency range.…”

Section: Theoretical Descriptionmentioning

confidence: 76%

“…In a few cases holes continue into a dielectric supporting fi lm. As a consequence, the optical response of such structures has only been theoretically estimated [28][29][30] and there are no experimental studies on SPP excitation by nanopore arrays in MIM fi lms.In this work we show for the fi rst time fabrication of arrays of very small (down to at least 50 nm) pores penetrating suspended MIM fi lms and connecting two reservoirs (without representing a total void fraction of more than ∼10%). [ 21,23,24 ] Overall, the concept of MIM thin fi lms is interesting due to the appearance of new SPP modes and the possibility to utilize such modes, e.g., in waveguides.…”

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confidence: 99%

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Plasmonic Nanopores in Metal‐Insulator‐Metal Films

Dahlin

Mapar

Xiong

et al. 2014

Advanced Optical Materials

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In comparison with structures containing nanoparticles, relatively little effort has been spent on developing void-based structures, although many studies have looked at the optical properties of nanoholes in thin metal fi lms since the discovery of "extraordinary" transmission. [ 6 ] The optical properties of individual nanoholes and arrays thereof are now fairly well understood, [ 7 ] especially for the case of thicker (typically hundreds of nm) metal fi lms, where each interface supports its own surface plasmon polariton (SPP). Nanohole arrays in thinner fi lms (typically ∼50 nm or less), where the individual SPPs hybridize into two new modes, [8][9][10] are now also fairly well studied. [11][12][13] Due to their unique geometry, solid state nanopores in general [ 14 ] and plasmonic nanopores in particular [ 15,16 ] have proven valuable in several unique applications. For instance, since a continuous metal fi lm can operate as an electrode, additional sensing techniques can easily be implemented. [ 17,18 ] However, fabrication and optical characterization of more advanced nanopore-based structures such as apertures penetrating several fi lms is scarce. In a few cases holes continue into a dielectric supporting fi lm. [ 16,19,20 ] For the case of metal-insulator-metal (MIM) fi lms, structures with high void fractions and relatively large apertures have been fabricated [ 21,22 ] and evaluated as negative refractive index (RI) metamaterials in the near infrared. [ 21,23,24 ] Overall, the concept of MIM thin fi lms is interesting due to the appearance of new SPP modes and the possibility to utilize such modes, e.g., in waveguides. [25][26][27] However, to date nobody has presented apertures in MIM fi lms that have even a single of the following three properties: Connecting two compartments, small diameters (on the order of ∼100 nm or less) and a low (tens of percent) void fraction. As a consequence, the optical response of such structures has only been theoretically estimated [28][29][30] and there are no experimental studies on SPP excitation by nanopore arrays in MIM fi lms.In this work we show for the fi rst time fabrication of arrays of very small (down to at least 50 nm) pores penetrating suspended MIM fi lms and connecting two reservoirs (without representing a total void fraction of more than ∼10%). The dispersions and fi elds for the SPP modes of the system are solved for by extending a theoretical formalism we recently introduced. [ 31 ] With emphasis on the hybridization of the bonding mode surface plasmons, we demonstrate how the nanopore arrays can be used to excite SPP modes in the MIM structures using visible A novel type of plasmonic nanopore array in a metal-insulator-metal thin fi lm is presented. The optical properties of this structure are described using a generic theoretical framework for surface waves in a coupled multilayer system. The characteristic spacing (short-range order) of the pores enables grating-type coupling to hybridized surface plasmons, with stronger coupling to some modes tha...

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Section: Theoretical Descriptionmentioning

confidence: 76%

mentioning

confidence: 99%

Plasmonic Nanopores in Metal‐Insulator‐Metal Films

Dahlin

Mapar

Xiong

et al. 2014

Advanced Optical Materials

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“…[ 123 ] Many other numerical studies on the absorption properties of SHA's followed. [124][125][126][127] One such study elaborates on the standard SHA design by integrating rectangular holes of different orientations, i.e. a mixed-SHA (MSHA), and are able to extend the absorptivity above 95% to a bandwidth of 17 nm at approximately 600 nm.…”

Section: Subwavelength Hole Arraysmentioning

confidence: 99%

Metamaterial Electromagnetic Wave Absorbers

2012

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The advent of negative index materials has spawned extensive research into metamaterials over the past decade. Metamaterials are attractive not only for their exotic electromagnetic properties, but also their promise for applications. A particular branch–the metamaterial perfect absorber (MPA)–has garnered interest due to the fact that it can achieve unity absorptivity of electromagnetic waves. Since its first experimental demonstration in 2008, the MPA has progressed significantly with designs shown across the electromagnetic spectrum, from microwave to optical. In this Progress Report we give an overview of the field and discuss a selection of examples and related applications. The ability of the MPA to exhibit extreme performance flexibility will be discussed and the theory underlying their operation and limitations will be established. Insight is given into what we can expect from this rapidly expanding field and future challenges will be addressed.

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“…6. As shown in this figure, the dispersion relations of the SPs of a sapphire/silver/sapphire multilayer are plotted based on the following equation: 14,19 …”

Section: The Led Modelmentioning

confidence: 99%

Role of metallic absorption on enhancing the light emitting efficiency by plasmonic gratings

Gou

Xuan

2013

Journal of Applied Physics

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Due to the adoption of the metallic materials in the surface-plasmon-based light emitting diodes (SP-LEDs), strong absorption of the metal can result in the dissipation of the most photons in the form of thermal energy. In order to investigate the role of the metallic absorption in the SP-LEDs, by means of a series of computational examples of our proposed structure, the effects of several features on the absorptivity of the metal and the light extraction efficiency (LEE) of the chips have been analyzed in detail. The results indicate that the chips with combined metallic and dielectric gratings can exhibit relatively the highest LEE, whereas the absorption of the metal in the chips is very strong, and the absorptivity is several times of LEE. It is concluded that to reduce the absorption and keep high light extraction, proper structure in which the odd mode of surface plasmons can be stimulated at the desired wavelength should be used. In addition, the hexagonal gratings show relatively larger light extraction enhancement and stronger absorption than the rectangular ones. V C 2013 AIP Publishing LLC. [http://dx.

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Investigation on Spectral Properties of Metal–Insulator–Metal Film Stack with Rectangular Hole Arrays

Cited by 14 publications

References 35 publications

Plasmonic Nanopores in Metal‐Insulator‐Metal Films

Plasmonic Nanopores in Metal‐Insulator‐Metal Films

Metamaterial Electromagnetic Wave Absorbers

Role of metallic absorption on enhancing the light emitting efficiency by plasmonic gratings

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