Cascaded Four-Wave Mixing on Quantum Paraelectrics for On-chip Cryogenic Microcombs

Harikrishnan Sundaresan; Prasad Muragesh; Madhu Thalakulam

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arXiv · 2605.25112

Cascaded Four-Wave Mixing on Quantum Paraelectrics for On-chip Cryogenic Microcombs

Harikrishnan Sundaresan·Prasad Muragesh·Madhu Thalakulam

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Abstract

Here, we demonstrate an on-chip cryogenic microwave frequency-comb on a planar superconducting resonator fabricated on Strontium titanate(STO), a quantum paraelectric material. The material's Kerr-type nonlinearity arising from the quantum paraelectric phase, an underexplored state, enables pronounced resonance shifts, Duffing-like bifurcations and comb generation via cascaded foure-wave mixing. Our results establish STO resonators as a low power, cryogenically compatible platforms for nonlinear microwave photonics, with applications in scalable quantum control and on-chip frequency synthesis.

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Harikrishnan Sundaresan, Prasad Muragesh, Madhu Thalakulam. 2026-05-24. Cascaded Four-Wave Mixing on Quantum Paraelectrics for On-chip Cryogenic Microcombs. https://arxiv.org/abs/2605.25112

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