Spectral engineering with coupled microcavities: active control of resonant mode-splitting

Autor(es)

Souza, Mario C. M. M. ^[1] ; Rezende, Guilherme F. M. ^[1] ; Barea, Luis A. M. ^{[1, 2]} ; von Zuben, Antonio A. G. ^[1] ; Wiederhecker, Gustavo S. ^[1] ; Frateschi, Newton C. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, Inst Fis Gleb Wataghin, BR-13083970 Campinas, SP - Brazil

^[2] Univ Fed Sao Carlos, Dept Engn Eletr, BR-13565905 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: OPTICS LETTERS; v. 40, n. 14, p. 3332-3335, JUL 15 2015.
• Citações Web of Science: 8

Resumo

Optical mode-splitting is an efficient tool to shape and fine-tune the spectral response of resonant nanophotonic devices. The active control of mode-splitting, however, is either small or accompanied by undesired resonance-shifts, often much larger than the resonance splitting. We report a control mechanism that enables reconfigurable and widely tunable mode splitting while efficiently mitigating undesired resonance shifts. This is achieved by actively controlling the excitation of counter-traveling modes in coupled resonators. The transition from a large splitting (80 GHz) to a single-notch resonance is demonstrated using low-power microheaters (35 mW). We show that the spurious resonance shift in our device is only limited by thermal crosstalk, and resonance-shift-free splitting control may be achieved. (C) 2015 Optical Society of America (AU)

• Processo FAPESP: 14/04748-2 - Microcavidades acopladas aplicadas ao processamento de sinais e integração fotônica
• Beneficiário: Mário César Mendes Machado de Souza
• Linha de fomento: Bolsas no Brasil - Doutorado
• Processo FAPESP: 12/17765-7 - Nanofotônica em semicondutores do Grupo IV e III-V
• Beneficiário: Gustavo Silva Wiederhecker
• Linha de fomento: Auxílio à Pesquisa - Apoio a Jovens Pesquisadores
• Processo FAPESP: 08/57857-2 - Fotônica para comunicações ópticas
• Beneficiário: Hugo Luis Fragnito
• Linha de fomento: Auxílio à Pesquisa - Temático