Journal
NANO LETTERS
Volume 20, Issue 6, Pages 4659-4666Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.0c01586
Keywords
Mechanical Nonlinerity; Frequency Comb; Graphene; Silicon Nitride; NEMS; Hybrid Resonators
Categories
Funding
- CSIR
- ERC [639739]
- DST [SERB/PHY/2015404]
- DFG [TRR 227]
- European Research Council (ERC) [639739] Funding Source: European Research Council (ERC)
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High quality factor mechanical resonators have shown great promise in the development of classical and quantum technologies. Simultaneously, progress has been made in developing controlled mechanical nonlinearity. Here, we combine these two directions of progress in a single platform consisting of coupled silicon nitride (SiNx) and graphene mechanical resonators. We show that nonlinear response can be induced on a large area SiNx resonator mode and can be efficiently controlled by coupling it to a gate-tunable, freely suspended graphene mode. The induced nonlinear response of the hybrid modes, as measured on the SiNx resonator surface is giant, with one of the highest measured Duffing constants. We observe a novel phononic frequency comb which we use as an alternate validation of the measured values, along with numerical simulations which are in overall agreement with the measurements.
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