Metal-dielectric multilayer systems are used for sensors, filters and absorbers. Fabrication of micro/nanostructures in these systems is complex, demanding and involves many fabrication steps. Glass poling (GP) and electric field assisted dissolution (EFAD) processes have great potential for micro/nano structuring of metal-dielectric systems. GP and EFAD are used to modify the samples’ compositional profile by applying voltage-inducing drift of metallic species in the direction of the applied field.

The research presented in this talk was aimed towards demonstration of the appropriateness of EFAD for micro-structuring by realization of a micro-structured metal-dielectric multilayer system with desired optical performance. The research was divided into: i) study of composition upon GP, applied to different types of silicate glass, ii) study of simultaneous EFAD of bimetal systems as the micro array filter should contain layers of two different metals and iii) depositing, micro-structuring and analysis of the micro-structured filter.

Besides the realization of the micro-array filter, the research resulted in: a) understanding how the poled glass refractive index profile correlates with the redistribution of alkali ions and other structural changes in glass, b) quantitative determination of the specific contribution of different alkali ion species to the refractive index of poled glass, c) determination and understanding of the dynamics of GP with multiple ion species and d) understanding that simultaneous EFAD of two metals embedded in dielectric multilayers is a very complex process requiring more detailed studies.

Metal-dielectric multilayer systems are used for sensors, filters and absorbers. Fabrication of micro/nanostructures in these systems is complex, demanding and involves many fabrication steps. Glass poling (GP) and electric field assisted dissolution (EFAD) processes have great potential for micro/nano structuring of metal-dielectric systems. GP and EFAD are used to modify the samples’ compositional profile by applying voltage-inducing drift of metallic species in the direction of the applied field.

The research presented in this talk was aimed towards demonstration of the appropriateness of EFAD for micro-structuring by realization of a micro-structured metal-dielectric multilayer system with desired optical performance. The research was divided into: i) study of composition upon GP, applied to different types of silicate glass, ii) study of simultaneous EFAD of bimetal systems as the micro array filter should contain layers of two different metals and iii) depositing, micro-structuring and analysis of the micro-structured filter.

Besides the realization of the micro-array filter, the research resulted in: a) understanding how the poled glass refractive index profile correlates with the redistribution of alkali ions and other structural changes in glass, b) quantitative determination of the specific contribution of different alkali ion species to the refractive index of poled glass, c) determination and understanding of the dynamics of GP with multiple ion species and d) understanding that simultaneous EFAD of two metals embedded in dielectric multilayers is a very complex process requiring more detailed studies.

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https://us06web.zoom.us/j/5081440931

Meeting ID: 508 144 0931

Seminar hosts: Neven Šantić i Matija Čulo