Xiaoyu Qi will defend her PhD thesis on 21 October 2026
The PhD researcher Xiaoyu Qi from the NANOPTO group at ICMAB-CSIC, will defend her PhD thesis on Wednesday, 21 October 2026 at ICMAB
Epitaxial thin films of epsilon ferrites for magnetic applications
PhD Candidate: Xiaoyu Qi
Date: Wednesday, 21 October 2026 Time: 10.00 AM Venue: Sala d'Actes MATGAS & ONLINE (Register here)
Abstract
This thesis develops a template-assisted self-assembly strategy for fabricating large-area plasmonic nanoparticle lattices from chemically synthesized metal colloids. The resulting periodic structures support high-Q surface lattice resonances through the coherent coupling between localized surface plasmon resonances and diffractive lattice modes. By incorporating chiral triskelion motifs, symmetry engineering is further used to achieve tunable chiroptical responses with enhanced absorption dissymmetry factors. The plasmonic platforms are also functionalized for reversible refractive-index sensing, resonance-enhanced circularly polarized photoluminescence, and structural stabilization by atomic layer deposition. Overall, this work establishes self-assembled plasmonic nanoparticle lattices as a scalable platform for multifunctional nanophotonic applications.
Supervisors
Agustín Mihi, ICMAB-CSIC
Luis A. Pérez, ICMAB-CSIC
Maria Isabel Carmona, ICMAB-CSIC
PhD committee
President: Neus Gómez, ICN2, Spain
Secretary: Pablo Guardia, ICMAB-CSIC, Spain
Vocal: Justin Zoppe, UPC, Spain
University: Universitat Autònoma de Barcelona (UAB)
