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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

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

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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]
Total Authors: 6
[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
Total Affiliations: 2
Document type: Journal article
Source: OPTICS LETTERS; v. 40, n. 14, p. 3332-3335, JUL 15 2015.
Web of Science Citations: 8

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)

FAPESP's process: 08/57857-2 - Photonics for optical communications
Grantee:Hugo Luis Fragnito
Support type: Research Projects - Thematic Grants
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
FAPESP's process: 12/17765-7 - Nanophotonics in Group IV and III-V semiconductors
Grantee:Gustavo Silva Wiederhecker
Support type: Research Grants - Young Investigators Grants