Dash, A and Nambiar, SR and Pandey, M and Raghavan, S and Naik, A and Selvaraja, SK (2019) Low-power four-wave mixing in graphene-on-SiN micro-ring resonator. In: 2D Photonic Materials and Devices II 2019, 6 - 7 February 2019, San Francisco.
Full text not available from this repository. (Request a copy)Abstract
Graphene has emerged as an attractive nonlinear-optical material due to the high coefficient of two-photon absorption and four-wave mixing. Four-wave mixing in graphene has been previously studied in silicon-photonic platform. Enhancement of the four-wave mixing using optical cavities such as silicon micro-ring resonator (MRR) has been demonstrated. Recently, similar experiments have been extended to silicon-nitride (SiN) waveguides and micro-ring resonators. Electrostatic tuning of the four-wave mixing, and generation of frequency combs have been demonstrated using SiN MRRs having a Q-factor of 106 at input pump powers ≥ 1 W. On-chip pump powers of the order of 10 mW to 100 mW are desirable to obtain high conversion efficiency of the four- wave mixing. However, such high on-chip powers are challenging to handle in integrated-optic platforms. We report preliminary experimental result of four-wave mixing in graphene-on-SiN MRRs with CW pump power of 120 μW, which is coupled to the MRR. The MRR used has a modest Q-factor of the order of 103 after transferring graphene. We observe four-wave mixing even with a 50 % coverage of monolayer graphene on the MRR. Such low power level allows low-power on-chip nonlinear process. Furthermore, low photon count could be used for quantum photonic process and fundamental research where high conversion efficiency may not be necessary.
| Item Type: | Conference Paper |
|---|---|
| Publication: | Proceedings of SPIE - The International Society for Optical Engineering |
| Publisher: | SPIE |
| Additional Information: | The copyright for this article belongs to SPIE. |
| Keywords: | Conversion efficiency; Efficiency; Graphene; Nonlinear optics; Optical materials; Optical resonators; Optical signal processing; Photonic devices; Photons; Q factor measurement; Silicon nitride; Silicon photonics; Two photon processes, Electrostatic tuning; Fundamental research; High conversion efficiency; Microring resonator; Microring Resonator (MRR); Non-linear optical material; Silicon nitride (SiN); Two photon absorption, Four wave mixing |
| Department/Centre: | Division of Interdisciplinary Sciences > Centre for Nano Science and Engineering |
| Date Deposited: | 22 Nov 2022 09:29 |
| Last Modified: | 22 Nov 2022 09:29 |
| URI: | https://eprints.iisc.ac.in/id/eprint/77964 |
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