title: Tunable squeezing using coupled ring resonators on a silicon nitride chip.
abstract: We demonstrate continuous tuning of the squeezing-level generated in a double-ring optical parametric oscillator by externally controlling the coupling condition using electrically controlled integrated microheaters. We accomplish this by utilizing the avoided crossing exhibited by a pair of coupled silicon nitride microring resonators. We directly detect a change in the squeezing level from 0.5 dB in the undercoupled regime to 2 dB in the overcoupled regime, which corresponds to a change in the generated on-chip squeezing factor from 0.9 to 3.9 dB. Such wide tunability in the squeezing level can be harnessed for on-chip quantum-enhanced sensing protocols that require an optimal degree of squeezing.
authors.forename: Avik
authors.initials: A
authors.lastname: Dutt
authors.forename: Steven
authors.initials: S
authors.lastname: Miller
authors.forename: Kevin
authors.initials: K
authors.lastname: Luke
authors.forename: Jaime
authors.initials: J
authors.lastname: Cardenas
authors.forename: Alexander L
authors.initials: AL
authors.lastname: Gaeta
authors.forename: Paulo
authors.initials: P
authors.lastname: Nussenzveig
authors.forename: Michal
authors.initials: M
authors.lastname: Lipson