Optical and microwave control of resonance fluorescence and squeezing spectra in a polar molecule



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Antón Revilla, Miguel Ángel and Razavi, S. Maede and Carreño Sánchez, Fernando and Thanopulos, Ioannis and Paspalakis, Emmanuel (2017) Optical and microwave control of resonance fluorescence and squeezing spectra in a polar molecule. Physical Review A, 96 (6). 16 p.. ISSN 1050-2947

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Official URL: http://dx.doi.org/10.1103/PhysRevA.96.063812


A two-level quantum emitter with broken inversion symmetry simultaneously driven by an optical field and a microwave field that couples to the permanent dipole's moment is presented. We focus to a situation where the angular frequency of the microwave field is chosen such that it closely matches the Rabi frequency of the optical field, the so-called Rabi resonance condition. Using a series of unitary transformations we obtain an effective Hamiltonian in the double-dressed basis which results in easily solvable Bloch equations which allow us to derive analytical expressions for the spectrum of the scattered photons. We analyze the steady-state population inversion of the system which shows a distinctive behavior at the Rabi resonance with regard to an ordinary two-level nonpolar system. We show that saturation can be produced even in the case that the optical field is far detuned from the transition frequency, and we demonstrate that this behavior can be controlled through the intensity and the angular frequency of the microwave field. The spectral properties of the scattered photons are analyzed and manifest the emergence of a series of Mollow-like triplets which may be spectrally broadened or narrowed for proper values of the amplitude and/or frequency of the low-frequency field. We also analyze the phase-dependent spectrum which reveals that a significant enhancement or suppression of the squeezing at certain sidebands can be produced. These quantum phenomena are illustrated in a recently synthesized molecular complex with high nonlinear optical response although they can also occur in other quantum systems with broken inversion symmetry.

Item Type:Article
Uncontrolled Keywords:Microwaves; Optical resonance fluorescence; Polar molecule; Light scattering; Resonance; Resonance fluorescence; Spectral properties
Subjects:Sciences > Physics > Electromagnetism
Sciences > Physics > Optics
Sciences > Physics > Particles
ID Code:46118
Deposited On:23 Jan 2018 08:35
Last Modified:25 Jan 2018 08:58

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