title: Real-time and low-cost sensing technique based on photonic bandgap structures.
abstract: A technique for the development of low-cost and high-sensitivity photonic biosensing devices is proposed and experimentally demonstrated. In this technique, a photonic bandgap structure is used as transducer, but its readout is performed by simply using a broadband source, an optical filter, and a power meter, without the need of obtaining the transmission spectrum of the structure; thus, a really low-cost system and real-time results are achieved. Experimental results show that it is possible to detect very low refractive index variations, achieving a detection limit below 2×10(-6) refractive index units using this low-cost measuring technique.
authors.affiliation: Nanophotonics Technology Center, Universidad Politécnica de Valencia, Camino de Vera s/n, 46022 Valencia, Spain. jagarcas@ntc.upv.es
authors.forename: J G
authors.initials: JG
authors.lastname: Castelló
authors.forename: V
authors.initials: V
authors.lastname: Toccafondo
authors.forename: P
authors.initials: P
authors.lastname: Pérez-Millán
authors.forename: N S
authors.initials: NS
authors.lastname: Losilla
authors.forename: J L
authors.initials: JL
authors.lastname: Cruz
authors.forename: M V
authors.initials: MV
authors.lastname: Andrés
authors.forename: J
authors.initials: J
authors.lastname: García-Rupérez
mesh_terms: D057230:Limit of Detection; D055096:Optical Devices / Q000191:economics*; D017785:Photons; D012965:Sodium Chloride / Q000032:analysis; D013997:Time Factors
chemical_list: D012965:Sodium Chloride