Room temperature cavity electromechanics in the sideband-resolved regime

Abstract

We demonstrate a sideband-resolved cavity electromechanical system operating at room temperature. It consists of a nanomechanical resonator, a strongly pre-stressed silicon nitride string, dielectrically coupled to a three-dimensional microwave cavity made of copper. The electromechanical coupling is characterized by two measurements, the cavity-induced eigenfrequency shift of the mechanical resonator and the optomechanically induced transparency. While the former is dominated by dielectric effects, the latter reveals a clear signature of the dynamical backaction of the cavity field on the resonator. This unlocks the field of cavity electromechanics for room temperature applications.

Ag/Au alloy entangled in a protein matrix: A plasmonic substrate coupling surface plasmons and molecular chirality

“…Initially, an analysis aimed at examining the Fabry-Pérot hybrid/surface plasmon polariton SPP hybridization in the near-field region was developed; then, the dye (rhodamine G6 [21] ) adsorbed on the Ag modifies the optomechanical spectrum and leads to a coupling rate greater than the optical decay (κ * < 𝜔 𝑐 ) [24] . The hallmark of the emitter's contribution to enhancing the sensitivity was characterized; hence, mass sensitivity was monitored by the frequency shift as various masses of deionized water were tested.…”

Membrane-in-the-middle optomechanical system and structural frequencies

“…Further, the mechanical oscillators can be coupled to radiation fields in both the optical and microwave regimes, so they can be implemented as mechanical microwave-optical converters [26,27] and have the potential of becoming a link between devices working in different frequency regimes. In fact, cavity optomechanics in the microwave regime has emerged as an area that has the potential to develop new classical electronic devices that can even operate at room temperature [28,29]. Especially relevant for the study, design, and optimization of such devices, a classical electric circuit modeling microwave optomechanics has been developed [30] and it has been successfully tested in an optomechanical system working in the classical regime without fitting parameters [31].…”

A Novel Architecture for room temperature microwave optomechanical experiments

“…RT microwave optomechanical experiments have been previously accomplished using microstrip resonators made of normal conducting Cu coupled to a mechanical element [21]. These resonators are marred by dielectric and conductor losses, limiting their quality factor to about 100 [24] which adds a constraint to the displacement and the force sensitivity.…”

“…However, both experiments required low temperatures and an antenna chip to be flip-chip bonded to the SiN membrane resonator for microwave coupling, increasing fabrication steps. Tuan et al [24] also employed a 3D microwave cavity made of Cu to dielectrically couple to a Si 3 N 4 string. They characterized the optomechanical coupling by driving the string using the two tones in a non-linear regime at RT.…”