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Curvilinear MetaSurfaces for Surface Wave Manipulation. (2019)
Journal Article
La Spada, L., Spooner, C., Haq, S., & Hao, Y. (2019). Curvilinear MetaSurfaces for Surface Wave Manipulation. Scientific Reports, 9(1), Article 3107. https://doi.org/10.1038/s41598-018-36451-8

Artificial sheet materials, known as MetaSurfaces, have been applied to fully control both space and surface waves due to their exceptional abilities to dynamically tailor wave fronts and polarization states, while maintaining small footprints. Howev... Read More about Curvilinear MetaSurfaces for Surface Wave Manipulation..

Metasurfaces for Advanced Sensing and Diagnostics (2019)
Journal Article
La Spada, L. (2019). Metasurfaces for Advanced Sensing and Diagnostics. Sensors, 19(2), 355. https://doi.org/10.3390/s19020355

Interest in sensors and their applications is rapidly evolving, mainly driven by the huge demand of technologies whose ultimate purpose is to improve and enhance health and safety. Different electromagnetic technologies have been recently used and ac... Read More about Metasurfaces for Advanced Sensing and Diagnostics.

Electromagnetic Nanoparticles for Sensing and Medical Diagnostic Applications (2018)
Journal Article
La Spada, L., & Vegni, L. (2018). Electromagnetic Nanoparticles for Sensing and Medical Diagnostic Applications. Materials, 11(4), 603. https://doi.org/10.3390/ma11040603

A modeling and design approach is proposed for nanoparticle-based electromagnetic devices. First, the structure properties were analytically studied using Maxwell’s equations. The method provides us a robust link between nanoparticles electromagnetic... Read More about Electromagnetic Nanoparticles for Sensing and Medical Diagnostic Applications.

Modeling and design for electromagnetic surface wave devices (2017)
Journal Article
La Spada, L., Haq, S., & Hao, Y. (2017). Modeling and design for electromagnetic surface wave devices. Radio Science, 52(9), 1049-1057. https://doi.org/10.1002/2017rs006379

A great deal of interest has reemerged recently in the study of surface waves. The possibility to control and manipulate electromagnetic wave propagations at will opens many new research areas and leads to lots of novel applications in engineering. I... Read More about Modeling and design for electromagnetic surface wave devices.

Surface Wave Cloak from Graded Refractive Index Nanocomposites (2016)
Journal Article
La Spada, L., McManus, T. M., Dyke, A., Haq, S., Zhang, L., Cheng, Q., & Hao, Y. (2016). Surface Wave Cloak from Graded Refractive Index Nanocomposites. Scientific Reports, 6(1), 29363. https://doi.org/10.1038/srep29363

Recently, a great deal of interest has been re-emerged on the possibility to manipulate surface waves, in particular, towards the THz and optical regime. Both concepts of Transformation Optics (TO) and metamaterials have been regarded as one of key e... Read More about Surface Wave Cloak from Graded Refractive Index Nanocomposites.

Isotropic and anisotropic surface wave cloaking techniques (2016)
Journal Article
McManus, T. M., La Spada, L., & Hao, Y. (2016). Isotropic and anisotropic surface wave cloaking techniques. Journal of Optics, 18(4), 044005. https://doi.org/10.1088/2040-8978/18/4/044005

In this paper we compare two different approaches for surface waves cloaking. The first technique is a unique application of Fermat's principle and requires isotropic material properties, but owing to its derivation is limited in its applicability. T... Read More about Isotropic and anisotropic surface wave cloaking techniques.

Metamaterial-based wideband electromagnetic wave absorber (2016)
Journal Article
La Spada, L., & Vegni, L. (2016). Metamaterial-based wideband electromagnetic wave absorber. Optics express, 24(6), 5763. https://doi.org/10.1364/oe.24.005763

In this paper, an analytical and numerical study of a new type of electromagnetic absorber, operating in the infrared and optical regime, is proposed. Absorption is obtained by exploiting Epsilon-Near-Zero materials. The structure electromagnetic pro... Read More about Metamaterial-based wideband electromagnetic wave absorber.

Spectral Green's Function for SPR Meta-Structures (2014)
Journal Article
Iovine, R., La Spada, L., Tarparelli, R., & Vegni, L. (2014). Spectral Green's Function for SPR Meta-Structures. Materials Science Forum, 792, 110-114. https://doi.org/10.4028/www.scientific.net/msf.792.110

In this paper we propose a new approach to study the electromagnetic field in Surface Plasmon Resonance (SPR) meta-structures. The geometry is a planar structure infinitely extended with a pulse excitation current embedded in the substrate. The gener... Read More about Spectral Green's Function for SPR Meta-Structures.

Optical Properties of Modified Nanorod Particles for Biomedical Sensing (2014)
Journal Article
Iovine, R., Spada, L. L., & Vegni, L. (2014). Optical Properties of Modified Nanorod Particles for Biomedical Sensing. IEEE Transactions on Magnetics, 50(2), 169-172. https://doi.org/10.1109/tmag.2013.2284552

In this paper, an analytical and numerical investigation for modified gold nanorod particles, operating in the visible and in the infrared regime is proposed. The modified particles consist in a core/shell structure (dielectric core/metallic shell) e... Read More about Optical Properties of Modified Nanorod Particles for Biomedical Sensing.

Conical Nanoparticles for Blood Disease Detection (2013)
Journal Article
Spada, L. L., Iovine, R., Tarparelli, R., & Vegni, L. (2013). Conical Nanoparticles for Blood Disease Detection. Advances in nanoparticles, 02(03), 259-265. https://doi.org/10.4236/anp.2013.23036

Metallic nanoparticles play an important role in the design of sensing platforms. In this paper, a new electromagnetic study for conical metal nanoparticles, working in the Near Infrared and Visible frequency regime, is proposed. The structures consi... Read More about Conical Nanoparticles for Blood Disease Detection.

Nanoparticle device for biomedical and optoelectronics applications (2013)
Journal Article
Iovine, R., La Spada, L., & Vegni, L. (2013). Nanoparticle device for biomedical and optoelectronics applications. COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering, 32(5), 1596-1608. https://doi.org/10.1108/compel-03-2013-0105

In this contribution, the aim is to present a nanoparticle device, operating in the visible regime based on the localized surface plasmon resonance (LSPR) phenomenon.
The nanoparticle electromagnetic properties are evaluated by a new analytical mod... Read More about Nanoparticle device for biomedical and optoelectronics applications.

Electromagnetic modeling of ellipsoidal nanoparticles for sensing applications (2013)
Journal Article
Spada, L. L., Iovine, R., & Vegni, L. (2013). Electromagnetic modeling of ellipsoidal nanoparticles for sensing applications. Optical Engineering, 52(5), 051205. https://doi.org/10.1117/1.oe.52.5.051205

We present a new analytical study of metallic nanoparticles, working in the infrared and visible frequency range. The structure consists of triaxial ellipsoidal resonating inclusions embedded in a dielectric environment. Our aim is to develop a new a... Read More about Electromagnetic modeling of ellipsoidal nanoparticles for sensing applications.

Modified Bow-Tie Nanoparticles Operating in the Visible and Near Infrared Frequency Regime (2013)
Journal Article
Iovine, R., Spada, L. L., & Vegni, L. (2013). Modified Bow-Tie Nanoparticles Operating in the Visible and Near Infrared Frequency Regime. Advances in nanoparticles, 02(01), 21-27. https://doi.org/10.4236/anp.2013.21005

In this contribution electromagnetic properties of traditional and modified bow-tie nanoparticles are investigated. The modified bow-tie particles consist of a pair of opposing metallic truncated triangles, embedded in a dielectric environment, with... Read More about Modified Bow-Tie Nanoparticles Operating in the Visible and Near Infrared Frequency Regime.

Nanoparticle Electromagnetic Properties for Sensing Applications (2012)
Journal Article
Spada, L. L., Iovine, R., & Vegni, L. (2012). Nanoparticle Electromagnetic Properties for Sensing Applications. Advances in nanoparticles, 01(02), 9-14. https://doi.org/10.4236/anp.2012.12002

Nanoparticles play a crucial role in biomedical and sensing applications. In this paper the design of non-spherical gold nanoparticles, operating in the near infrared and visible regime, is proposed. The structures consist of metallic resonating incl... Read More about Nanoparticle Electromagnetic Properties for Sensing Applications.

Metamaterial-based Sensor Design Working in Infrared Frequency Range (2011)
Journal Article
La Spada, L., Bilotti, F., & Vegni, L. (2011). Metamaterial-based Sensor Design Working in Infrared Frequency Range. Progress in electromagnetics research B: PIER B, 34, 205-223. https://doi.org/10.2528/pierb11060303

In this paper, we propose the design of high sensitivity and selectivity metamaterial-based biosensors operating in the THz regime. The proposed sensors consist of planar array of resonant metallic structures, whose frequency response is modified thr... Read More about Metamaterial-based Sensor Design Working in Infrared Frequency Range.

Double CSRR for water content detection in biological matter
Presentation / Conference Contribution
La Spada, L., Bilotti, F., & Vegni, L. (2011, September). Double CSRR for water content detection in biological matter. Presented at 4th EOS Topical Meeting on Optical Microsystems (OµS’11), Capri, Italy

In this study, a low-cost, compact, and high-performing metamaterial-based biosensor operating in the THz frequency range is presented. The sensor is designed to detect the presence of water content in biological matter by spectral absorption measure... Read More about Double CSRR for water content detection in biological matter.

Metamaterial-based design of biological sensors operating at THz frequencies
Presentation / Conference Contribution
La Spada, L., Bilotti, F., & Vegni, L. (2011, October). Metamaterial-based design of biological sensors operating at THz frequencies

In this contribution, we present an omega-shaped electromagnetic resonator, which is of potential interest for THz biosensors. A new analytical model for such an inclusion-type is developed, considering the effects of the fringing capacitance. After... Read More about Metamaterial-based design of biological sensors operating at THz frequencies.

Metamaterial resonator arrays for organic and inorganic compound sensing
Presentation / Conference Contribution
La Spada, L., Bilotti, F., & Vegni, L. (2011, August). Metamaterial resonator arrays for organic and inorganic compound sensing. Presented at Photonics Prague 2011: the 7th International Conference on Photonics, Devices and Systems, Prague, Czech Republic

In this paper, an electromagnetic metamaterial resonator operating in the terahertz frequency range is presented. By arranging the resonator in a planar array, it is possible to use the structure as a sensing device for organic and inorganic compound... Read More about Metamaterial resonator arrays for organic and inorganic compound sensing.

Metamaterial biosensor for cancer detection
Presentation / Conference Contribution
La Spada, L., Bilotti, F., & Vegni, L. (2011, October). Metamaterial biosensor for cancer detection. Presented at 2011 IEEE Sensors, Limerick, Ireland

In this study a low-cost, compact, and high-performing metamaterial-based biosensor operating in the GHz regime is presented. The sensor is designed to detect the presence of a tumor by means of permittivity and absorption measurements. A shift in th... Read More about Metamaterial biosensor for cancer detection.