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Benedetto Troia   Dr.  Other 
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Benedetto Troia published an article in August 2016.
Top co-authors See all
Milos Nedeljkovic

88 shared publications

Optoelectronics Research Centre, University of Southampton, Southampton SO17 1BJ, UK

Anna Gina Perri

68 shared publications

Electronic Devices Laboratory, Department of Electrical and Information Engineering, Polytechnic University of Bari, Bari 70125, Italy

Vittorio M. N. Passaro

44 shared publications

Electrical and Information Engineering, Politecnico di Bari, Bari, ba Italy 70125 ()

Ali Z. Khokhar

40 shared publications

Univ. of Southampton (United Kingdom)

Youfang Hu

22 shared publications

Optoelectronics Research Centre, University of Southampton, Southampton SO17 1BJ, UK; s:(A.Z.K.);(M.N.);(S.A.R.);(Y.H.);(G.Z.M.)

Publication Record
Distribution of Articles published per year 
(2014 - 2016)
Total number of journals
published in
Article 0 Reads 0 Citations Investigation of a Fiberoptic Device Based on a Long Period Grating in a Ring Resonator Cinzia Corcione, Benedetto Troia, Francesco De Leonardis, Vi... Published: 24 August 2016
Sensors, doi: 10.3390/s16091357
DOI See at publisher website PubMed View at PubMed ABS Show/hide abstract
A fiberoptic architecture based on a ring resonator (RR) including a typical long period grating (LPG) was investigated. The interactions between the fundamental core mode (LP01 or HE11) coupled to the RR and the cladding mode (LP08), excited into the cavity by means of the LPG, allow a peculiar spectral response characterized by two splitting resonances to be achieved. The new LPGRR architecture is investigated theoretically and a mathematical modelling based on the transfer matrix method (TMM) is proposed. The theoretical results are compared with the experiments measured by an open-loop LPG, while the performance of the relative LPGRR was estimated by a theoretical parametric analysis. Finally, an overview of the possible LPGRR sensing applications is provided by investigating the features of a strain sensor operating in different environmental conditions.
Article 3 Reads 2 Citations Design Procedure and Fabrication of Reproducible Silicon Vernier Devices for High-Performance Refractive Index Sensing Benedetto Troia, Ali Z. Khokhar, Milos Nedeljkovic, Scott A.... Published: 10 June 2015
Sensors, doi: 10.3390/s150613548
DOI See at publisher website PubMed View at PubMed ABS Show/hide abstract
In this paper, we propose a generalized procedure for the design of integrated Vernier devices for high performance chemical and biochemical sensing. In particular, we demonstrate the accurate control of the most critical design and fabrication parameters of silicon-on-insulator cascade-coupled racetrack resonators operating in the second regime of the Vernier effect, around 1.55 μm. The experimental implementation of our design strategies has allowed a rigorous and reliable investigation of the influence of racetrack resonator and directional coupler dimensions as well as of waveguide process variability on the operation of Vernier devices. Figures of merit of our Vernier architectures have been measured experimentally, evidencing a high reproducibility and a very good agreement with the theoretical predictions, as also confirmed by relative errors even lower than 1%. Finally, a Vernier gain as high as 30.3, average insertion loss of 2.1 dB and extinction ratio up to 30 dB have been achieved.
Article 4 Reads 4 Citations Cascade-coupled racetrack resonators based on the Vernier effect in the mid-infrared Benedetto Troia, Ali Z. Khokhar, Milos Nedeljkovic, Jordi So... Published: 23 September 2014
Optics Express, doi: 10.1364/oe.22.023990
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In this paper we report the experimental demonstration of racetrack resonators in silicon-on-insulator technology platform operating in the mid-infrared wavelength range of 3.7-3.8 μm. Insertion loss lower than 1 dB and extinction ratio up to 30 dB were measured for single resonators. The experimental characterization of directional couplers and bending losses in silicon rib waveguides are also reported. Furthermore, we present the design and fabrication of cascade-coupled racetrack resonators based on the Vernier effect. Experimental spectra of Vernier architectures were demonstrated for the first time in the mid-infrared with insertion loss lower than 1 dB and maximum interstitial peak suppression of 10 dB.
Article 4 Reads 3 Citations Performance of SOI Bragg Grating Ring Resonator for Nonlinear Sensing Applications Francesco De Leonardis, Carlo Edoardo Campanella, Benedetto ... Published: 28 August 2014
Sensors, doi: 10.3390/s140916017
DOI See at publisher website PubMed View at PubMed ABS Show/hide abstract
In this paper, a spectroscopic sensor formed by a silicon-on-insulator waveguiding Bragg grating ring resonator working in linear and non-linear regime is proposed. In linear regime, the device shows a spectral response characterized by a photonic band gap (PBG). Very close to the band gap edges, the resonant structure exhibits split modes having a splitting magnitude equal to the PBG spectral extension, whose characteristics can be exploited to obtain a RI optical sensor almost insensitive to the fabrication tolerances and environmental perturbations. When the device operates in nonlinear regime, exactly in the spectral region showing the split resonant modes, the RI sensing performance is strongly improved with respect to the linear regime. This improvement, demonstrated by taking into account all the non-linear effects excited in the integrated silicon structure (i.e., Two Photon Absorption (TPA), TPA-induced Free Carrier Absorption, plasma dispersion, Self-Phase-Modulation and Cross-Phase-Modulation effects as induced by Kerr nonlinearity) as well as the deleterious thermal and stress effects, allows enhancing the performance of the RI split mode resonant sensors, while achieving good immunity to the fabrication tolerances and environmental perturbations. The improvement in terms of sensor resolution can be at least one order of magnitude, still without using optimal parameters.
Article 3 Reads 10 Citations Recent Advances in Gas and Chemical Detection by Vernier Effect-Based Photonic Sensors Mario La Notte, Benedetto Troia, Tommaso Muciaccia, Carlo Ed... Published: 10 March 2014
Sensors, doi: 10.3390/s140304831
DOI See at publisher website PubMed View at PubMed ABS Show/hide abstract
Recently, the Vernier effect has been proved to be very efficient for significantly improving the sensitivity and the limit of detection (LOD) of chemical, biochemical and gas photonic sensors. In this paper a review of compact and efficient photonic sensors based on the Vernier effect is presented. The most relevant results of several theoretical and experimental works are reported, and the theoretical model of the typical Vernier effect-based sensor is discussed as well. In particular, sensitivity up to 460 μm/RIU has been experimentally reported, while ultra-high sensitivity of 2,500 μm/RIU and ultra-low LOD of 8.79 × 10−8 RIU have been theoretically demonstrated, employing a Mach-Zehnder Interferometer (MZI) as sensing device instead of an add drop ring resonator.