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Inducing optical self-pulsation by electrically tuning graphene on a silicon microring.
- Source :
- Nanophotonics (21928606); Sep2022, Vol. 11 Issue 17, p4017-4025, 9p
- Publication Year :
- 2022
-
Abstract
- A mechanism for self-pulsation in a proposed graphene-on-silicon microring device is studied. The relevant nonlinear effects of two photon absorption, Kerr effect, saturable absorption, free carrier absorption, and dispersion are included in a coupled mode theory framework. We look at the electrical tunability of absorption and the Kerr effect in graphene. We show that the microring can switch from a stable rest state to a self-pulsation state by electrically tuning the graphene under constant illumination. This switching is indicative of a supercritical Hopf bifurcation since the frequency of the pulses is approximately constant at 7 GHz and the amplitudes initial grow with increasing Fermi level. The CMOS compatibility of graphene and the opto-electronic mechanism allows this to device to be fairly easily integrated with other silicon photonic devices. [ABSTRACT FROM AUTHOR]
- Subjects :
- GRAPHENE
KERR electro-optical effect
LIGHT absorption
HOPF bifurcations
FERMI level
Subjects
Details
- Language :
- English
- ISSN :
- 21928606
- Volume :
- 11
- Issue :
- 17
- Database :
- Complementary Index
- Journal :
- Nanophotonics (21928606)
- Publication Type :
- Academic Journal
- Accession number :
- 158647784
- Full Text :
- https://doi.org/10.1515/nanoph-2022-0077