title: Recent advances in gas and chemical detection by Vernier effect-based photonic sensors.
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.
authors.affiliation: Photonics Research Group, Dipartimento di Ingegneria Elettrica e dell'Informazione, Politecnico di Bari, via E. Orabona n. 4, Bari 70125, Italy. lanottemario@alice.it.
authors.forename: Mario
authors.initials: M
authors.lastname: La Notte
authors.affiliation: Photonics Research Group, Dipartimento di Ingegneria Elettrica e dell'Informazione, Politecnico di Bari, via E. Orabona n. 4, Bari 70125, Italy. benedetto.troia@poliba.it.
authors.forename: Benedetto
authors.initials: B
authors.lastname: Troia
authors.affiliation: Photonics Research Group, Dipartimento di Ingegneria Elettrica e dell'Informazione, Politecnico di Bari, via E. Orabona n. 4, Bari 70125, Italy. tommaso.muciaccia@hotmail.it.
authors.forename: Tommaso
authors.initials: T
authors.lastname: Muciaccia
authors.affiliation: Photonics Research Group, Dipartimento di Ingegneria Elettrica e dell'Informazione, Politecnico di Bari, via E. Orabona n. 4, Bari 70125, Italy. edoardo.campanella81@gmail.com.
authors.forename: Carlo Edoardo
authors.initials: CE
authors.lastname: Campanella
authors.affiliation: Photonics Research Group, Dipartimento di Ingegneria Elettrica e dell'Informazione, Politecnico di Bari, via E. Orabona n. 4, Bari 70125, Italy. francesco.deleonardis@poliba.it.
authors.forename: Francesco
authors.initials: F
authors.lastname: De Leonardis
authors.affiliation: Photonics Research Group, Dipartimento di Ingegneria Elettrica e dell'Informazione, Politecnico di Bari, via E. Orabona n. 4, Bari 70125, Italy. vittorio.passaro@poliba.it.
authors.forename: Vittorio M N
authors.initials: VM
authors.lastname: Passaro
mesh_terms: D015374:Biosensing Techniques / Q000295:instrumentation*; D003198:Computer Simulation; D005740:Gases / Q000032:analysis*; D008962:Models, Theoretical; D017785:Photons; D013057:Spectrum Analysis
chemical_list: D005740:Gases