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Superando limitações e possibilitando novas funcionalidades em fotônica de silício integrada

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Mário César Mendes Machado de Souza
Total Authors: 1
Document type: Doctoral Thesis
Institution: Universidade Estadual de Campinas, Instituto de Física Gleb Wataghin
Defense date:
Advisor: Newton Cesário Frateschi

After two decades of continuous progress, integrated photonics has proven its indisputable role as an enabling technology. It addresses important technological demands of our time such as ultrafast optical data transfer and processing while allowing substantial progress in emerging areas, including lab-on-a-chip. Although the basic functionalities required for most applications (light sources, modulators, filters, delay lines, detectors, etc.) are now available in a variety of designs and platforms, a few challenges remain and room for improvement can still be found. During the last four years, we have been interested in identifying some of these challenges and in providing interesting approaches to tackle a handful. This thesis, encompassing an important share of such investigations, can be divided into two topics. First, we present coupled microresonators as devices allowing for flexible and reconfigurable spectral control. Exploiting these devices, we demonstrate novel functionalities like the reconfigurable resonance-splitting control, we provide novel modeling tools such as a modified coupled mode theory, and we propose a coupled-ring modulator that overcomes the trade-off between modulation efficiency and bandwidth faced by single microrings modulators. The second topic addresses the realization of an on-chip Fourier transform spectrometer using silicon photonics. We discuss the challenges of realizing such device due to non-idealities inherent to the silicon platform (dispersion and thermo-optic non-linearity) and we provide an experimental demonstration indicating how this device can pave the way for robust and cost-effective portable spectrometers (AU)

FAPESP's process: 14/04748-2 - Coupled microresonators applied to signal processing and photonics integration
Grantee:Mário César Mendes Machado de Souza
Support type: Scholarships in Brazil - Doctorate