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Digital archive of theses discussed at the University of Pisa

 

Thesis etd-05012020-160548


Thesis type
Tesi di dottorato di ricerca
Author
LA MATTINA, ANTONINO AMEDEO
URN
etd-05012020-160548
Thesis title
Exploiting porous silicon technology for photonic applications: from bioresorbable sensors to monolithic lasers
Academic discipline
ING-INF/01
Course of study
INGEGNERIA DELL'INFORMAZIONE
Supervisors
tutor Prof. Barillaro, Giuseppe
Keywords
  • bioresorbable
  • effective medium approximation
  • hybrid lasers
  • layer-by-layer nanoassembly
  • photonics
  • porous silicon
  • sensors
  • smartphone-based microscopy
  • transfer matrix method
Graduation session start date
15/05/2020
Availability
Full
Summary
In this thesis work, nanostructured porous silicon has been used in a variety of photonic applications. First of all, a thorough literature review on bioresorbable electronics is offered, analyzing passive components, power sources, physical and chemical sensors, and optical devices. Then a bioresorbable optical pH sensor with possible application in skin wound monitoring is presented, leveraging porous silicon as structural material for layer-by-layer nanoassembly of polyelectrolyte functionalized with fluorescent moyeties. Device fluorescence is demonstrated to be pH-dependent in buffered solutions and simulated plasma, in flow cell and inserted under artificial skin foil. Finally, a simple method to estimate theoretical reflectance and transmittance spectra of arbitrary layered dielectric structures is reported, and its application versatility in various porous silicon photonic crystal (namely, interferometers, distributed Bragg reflectors (DBRs), and resonant microcavities) modeling is shown.
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