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MWP phase shifters integrated in PbS-SU8 waveguides

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MWP phase shifters integrated in PbS-SU8 waveguides

dc.contributor.author	Hervás, J.
dc.contributor.author	Suárez, Isaac
dc.contributor.author	Pérez Soler, Joaquín
dc.contributor.author	Rodríguez Cantó, Pedro Javier
dc.contributor.author	Abargues López, Rafael
dc.contributor.author	Martínez-Pastor, Juan P.
dc.contributor.author	Sales, S.
dc.contributor.author	Capmany, J.
dc.date.accessioned	2020-10-15T09:42:44Z
dc.date.available	2020-10-15T09:42:44Z
dc.date.issued	2015
dc.identifier.citation	Hervás,J. Suárez,Isaac Pérez,J. Rodríguez Cantó,Pedro J. Abargues López,Rafael Martínez-Pastor,J.P. Sales,S. Capmany,J. 2015 MWP phase shifters integrated in PbS-SU8 waveguides Optics Express 23 11 14351 14359
dc.identifier.uri	https://hdl.handle.net/10550/75854
dc.description.abstract	We present new kind of microwave phase shifters (MPS) based on dispersion of PbS colloidal quantum dots (QDs) in commercially available photoresist SU8 after a ligand exchange process. Ridge PbS-SU8 waveguides are implemented by integration of the nanocomposite in a silicon platform. When these waveguides are pumped at wavelengths below the band-gap of the PbS QDs, a phase shift in an optically conveyed (at 1550 nm) microwave signal is produced. The strong light confinement produced in the ridge waveguides allows an improvement of the phase shift as compared to the case of planar structures. Moreover, a novel ridge bilayer waveguide composed by a PbS-SU8 nanocomposite and a SU8 passive layer is proposed to decrease the propagation losses of the pump beam and in consequence to improve the microwave phase shift up to 36.5° at 25 GHz. Experimental results are reproduced by a theoretical model based on the slow light effect produced in a semiconductor waveguide due to the coherent population oscillations. The resulting device shows potential benefits respect to the current MPS technologies since it allows a fast tunability of the phase shift and a high level of integration due to its small size.
dc.language.iso	eng
dc.relation.ispartof	Optics Express, 2015, vol. 23, num. 11, p. 14351-14359
dc.subject	Ones
dc.subject	Òptica
dc.subject	Electrònica
dc.title	MWP phase shifters integrated in PbS-SU8 waveguides
dc.type	journal article	es_ES
dc.date.updated	2020-10-15T09:42:44Z
dc.identifier.doi	10.1364/OE.23.014351
dc.identifier.idgrec	111851
dc.rights.accessRights	open access	es_ES