MWP phase shifters integrated in PbS-SU8 waveguides

MWP phase shifters integrated in PbS-SU8 waveguides

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MWP phase shifters integrated in PbS-SU8 waveguides

Show simple item record Hervás, J. Suárez, Isaac Pérez Soler, Joaquín Rodríguez Cantó, Pedro Javier Abargues López, Rafael Martínez-Pastor, Juan P. Sales, S. Capmany, J. 2020-10-15T09:42:44Z 2020-10-15T09:42:44Z 2015
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.rights.uri info:eu-repo/semantics/openAccess
dc.source 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.subject Ones
dc.subject Òptica
dc.subject Electrònica
dc.title MWP phase shifters integrated in PbS-SU8 waveguides
dc.type info:eu-repo/semantics/article 2020-10-15T09:42:44Z
dc.identifier.idgrec 111851

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