Molecular optomechanics in the anharmonic regime: from nonclassical
mechanical states to mechanical lasing
- URL: http://arxiv.org/abs/2306.15152v1
- Date: Tue, 27 Jun 2023 02:17:29 GMT
- Title: Molecular optomechanics in the anharmonic regime: from nonclassical
mechanical states to mechanical lasing
- Authors: Miko{\l}aj K. Schmidt and Michael J. Steel
- Abstract summary: We show that anharmonicity can effectively suppress the mechanical amplification, shifting and reshaping the onset of coherent mechanical oscillations.
Our estimates indicate that both effects should be within reach of the existing implementations of the Surface Enhanced Raman Scattering.
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: Cavity optomechanics aims to establish optical control over vibrations of
mechanical systems, to heat, cool or to drive them toward coherent, or
nonclassical states. This field was recently extended to include molecular
optomechanics, which describes the dynamics of THz molecular vibrations coupled
to the optical fields of lossy cavities via Raman transitions, and was
developed to understand the anomalous amplification of optical phonons in
Surface-Enhanced Raman Scattering experiments. But the molecular platform
should prove suitable for demonstrating more sophisticated optomechanical
effects, including engineering of nonclassical mechanical states, or inducing
coherent molecular vibrations. In this work, we propose two pathways towards
implementing these effects, enabled or revealed by the strong intrinsic
anharmonicities of molecular vibrations. First, to prepare a nonclassical
mechanical state, we propose an incoherent analogue of the mechanical blockade,
in which the molecular aharmonicity and optical response of hybrid cavities
isolate the two lowest-energy vibrational states. Secondly, we show that for a
strongly driven optomechanical system, the anharmonicity can effectively
suppress the mechanical amplification, shifting and reshaping the onset of
coherent mechanical oscillations. Our estimates indicate that both effects
should be within reach of the existing implementations of the Surface Enhanced
Raman Scattering, opening the pathway towards the coherent and nonclassical
effects in molecular optomechanics.
Related papers
- Tunable anharmonicity in cavity optomechanics in the unresolved sideband regime [0.0]
We present a theory that predicts the measurable signatures left by the mechanical anharmonicity.
In particular, we obtain analytically and numerically the mechanical displacement spectrum, and explore the imprints of the mechanical anharmonicity on the cavity light field.
arXiv Detail & Related papers (2025-01-15T16:21:21Z) - Nanocavities for Molecular Optomechanics: their fundamental description and applications [0.0]
This Perspective is to clarify the connection between the languages and parameters used in the fields of molecular cavity optomechanics.
We aim to make the theoretical framework of molecular cavity optomechanics practically usable for the SERS and nanoplasmonics community at large.
arXiv Detail & Related papers (2024-09-19T07:54:20Z) - Quantum control of ro-vibrational dynamics and application to
light-induced molecular chirality [39.58317527488534]
Achiral molecules can be made temporarily chiral by excitation with electric fields.
We go beyond the assumption of molecular orientations to remain fixed during the excitation process.
arXiv Detail & Related papers (2023-10-17T20:33:25Z) - Enhanced optomechanical interaction in the unbalanced interferometer [40.96261204117952]
Quantum optomechanical systems enable the study of fundamental questions on quantum nature of massive objects.
Here we propose a modification of the Michelson-Sagnac interferometer, which allows to boost the optomechanical coupling strength.
arXiv Detail & Related papers (2023-05-11T14:24:34Z) - Strong mechanical squeezing in a microcavity with double quantum wells [0.0]
In a hybrid quantum system composed of two quantum wells placed inside a cavity with a moving end mirror pumped by bichromatic coherent light, we address the formation of squeezed states of a mechanical resonator.
We show that the robustness of this squeezing against thermal fluctuations is important for practical applications of such systems.
arXiv Detail & Related papers (2023-02-01T16:00:55Z) - Dissipative Optomechanics in High-Frequency Nanomechanical Resonators [0.0]
We show the first dissipative optomechanical system operating in the sideband-resolved regime, where the mechanical frequency is larger than the optical linewidth.
Our figures represent a two-order-of-magnitude leap in the mechanical frequency and a tenfold increase in the dissipative optomechanical coupling rate compared to previous works.
arXiv Detail & Related papers (2022-12-30T03:16:31Z) - Direct laser-written optomechanical membranes in fiber Fabry-Perot
cavities [41.94295877935867]
We demonstrate a cavity optomechanical experiment using 3D-laser-written polymer membranes inside fiber Fabry-Perot cavities.
We observe optomechanical spring tuning of the mechanical resonator by tens of kHz exceeding its linewidth at cryogenic temperatures.
arXiv Detail & Related papers (2022-12-27T16:02:03Z) - Phononically shielded photonic-crystal mirror membranes for cavity
quantum optomechanics [48.7576911714538]
We present a highly reflective, sub-wavelength-thick membrane resonator featuring high mechanical quality factor.
We construct a Fabry-Perot-type optical cavity, with the membrane forming one terminating mirror.
We demonstrate optomechanical sideband cooling to mK-mode temperatures, starting from room temperature.
arXiv Detail & Related papers (2022-12-23T04:53:04Z) - Localized vibrational modes in waveguide quantum optomechanics with
spontaneously broken PT symmetry [117.44028458220427]
We study theoretically two vibrating quantum emitters trapped near a one-dimensional waveguide and interacting with propagating photons.
In the regime of strong optomechanical interaction the light-induced coupling of emitter vibrations can lead to formation of spatially localized vibration modes, exhibiting parity-time symmetry breaking.
arXiv Detail & Related papers (2021-06-29T12:45:44Z) - Waveguide quantum optomechanics: parity-time phase transitions in
ultrastrong coupling regime [125.99533416395765]
We show that the simplest set-up of two qubits, harmonically trapped over an optical waveguide, enables the ultrastrong coupling regime of the quantum optomechanical interaction.
The combination of the inherent open nature of the system and the strong optomechanical coupling leads to emerging parity-time (PT) symmetry.
The $mathcalPT$ phase transition drives long-living subradiant states, observable in the state-of-the-art waveguide QED setups.
arXiv Detail & Related papers (2020-07-04T11:02:20Z) - Stroboscopic quantum optomechanics [0.0]
We show that ground-state cooling and mechanical squeezing can be achieved, even in the presence of mechanical dissipation.
We provide a full quantum-mechanical treatment of stroboscopic backaction-evading measurements.
arXiv Detail & Related papers (2020-03-09T19:00:58Z)
This list is automatically generated from the titles and abstracts of the papers in this site.
This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.