Otimização de cristais optomecânicos híbridos e efeitos termo-optomecânicos

Author(s)

Cauê Moreno Kersul de Castro Carvalho

• Document type: Doctoral Thesis
• Press: Campinas, SP.
• Institution: Universidade Estadual de Campinas (UNICAMP). Instituto de Física Gleb Wataghin
• Defense date: 2024-03-22

Examining board members

Thiago Pedro Mayer Alegre; Ben Hur Viana Borges; Odilon Divino Damasceno Couto Júnior; Thiago Barbosa dos Santos Guerreiro; Felippe Alexandre Silva Barbosa

• Advisor: Thiago Pedro Mayer Alegre

Abstract

This thesis is divided in 4 chapters. The first chapter is a brief and general introduction to optomechanics, where we contextualize the topics discussed in the following chapters in the bigger picture of optomechanics. In the second chapter we discuss photothermal forces in optomechanical devices, more specifically we develop a rigorous model for their prediction and we experimentally validate such model. In the third chapter we change topics, discussing mode localization in chains of coupled resonators. This chapter works as a tutorial about mode confinement in periodic structures in general, exploring fundamental aspects related to the design of photonic and phononic crystals. In the fourth and final chapter we discuss our work on the understanding and optimization of the C-shape, a 2D optomechanical crystal with applications on quantum optomechanics. Our focus in this last chapter is mainly on how the Silicon mechanical anisotropy affects the C-shape mechanical modes (AU)

• FAPESP's process: 20/06348-2 - Non-linear effects and dissipation in optomechanical cavities
• Grantee: Cauê Moreno Kersul de Castro Carvalho
• Support Opportunities: Scholarships in Brazil - Doctorate