Photonic molecules for application in silicon-on-insulator optical sensors

Autor(es)

Barea, Luis A. M. ; Souza, Mario C. M. M. ; Moras, Andre L. ; Catellan, Alvaro R. G. ; Cirino, Giuseppe A. ; Von Zuben, Antonio A. G. ; Bassani, Jose W. M. ; Frateschi, Newton C. ; Reed, GT ; Knights, AP

• Tipo de documento: Artigo Científico
• Fonte: SILICON PHOTONICS XIII; v. 10537, p. 8-pg., 2018-01-01.

Resumo

Optical sensors based on integrated photonics have experienced impressive advancements in the past few decades and represent one of the main sensing solutions in many areas including environmental sensing and medical diagnostics. In this context, optical microcavities are extensively employed as refractive index (RI) sensors, providing sharp optical resonances that allow the detection of very small variations in the surrounding RI. With increased sensitivity, however, the device is subjected to environmental perturbations that can also change the RI, such as temperature variations, and therefore compromise their reliability. In this work, we present the concept and experimental realization of a photonic sensor based on coupled microcavities or Photonic Molecules (PM) in which only one cavity is exposed to the sensing solution, allowing a differential measurement of the RI change. The device consists of an exposed 5-mu m radius microdisk resonator coupled to an external clad microring resonator fabricated on silicon-on-insulator (SOl) platform. This design allows good sensitivity (26 nm/RIU) for transverse electrical mode (TE-mode) in a compact footprint (40 x 40 mu m(2)), representing a good solution for real-life applications in which measurement conditions are not easily controllable. (AU)

• Processo FAPESP: 15/12461-8 - Sensores ópticos baseados em moléculas fotônicas fabricados sobre uma plataforma de Silício-sobre-isolante
• Beneficiário: Alvaro Ricardo Guiato Catellan
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica
• Processo FAPESP: 14/04748-2 - Microcavidades acopladas aplicadas ao processamento de sinais e integração fotônica
• Beneficiário: Mário César Mendes Machado de Souza
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 15/20525-6 - Dispositivos ativos explorando efeitos capacitivos induzidos por cargas livres em guias de onda de silício
• Beneficiário: Mário César Mendes Machado de Souza
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Doutorado