Selective Coupling Enhances Harmonic Generation of Whispering-Gallery Modes

Trainor, Luke S.; Sedlmeir, Florian; Peuntinger, Christian; Schwefel, Harald G. L.

doi:10.1103/physrevapplied.9.024007

Cited by 16 publications

(7 citation statements)

References 24 publications

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“…By using a birefringent coupling prism (for example rutile or LiNbO 3 ), TE and TM modes can be out‐coupled along spatially separated paths. Alternatively, the beams can be separated with the use of a polarizing beam splitter …”

Section: Experimental Approachesmentioning

confidence: 99%

Coherent Conversion Between Microwave and Optical Photons—An Overview of Physical Implementations

et al. 2019

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Quantum information technology based on solid state qubits has created much interest in converting quantum states from the microwave to the optical domain. Optical photons, unlike microwave photons, can be transmitted by fiber, making them suitable for long distance quantum communication. Moreover, the optical domain offers access to a large set of very well‐developed quantum optical tools, such as highly efficient single‐photon detectors and long‐lived quantum memories. For a high fidelity microwave to optical transducer, efficient conversion at single photon level and low added noise is needed. Currently, the most promising approaches to build such systems are based on second‐order nonlinear phenomena such as optomechanical and electro‐optic interactions. Alternative approaches, although not yet as efficient, include magneto‐optical coupling and schemes based on isolated quantum systems like atoms, ions, or quantum dots. Herein, the necessary theoretical foundations for the most important microwave‐to‐optical conversion experiments are provided, their implementations are described, and the current limitations and future prospects are discussed.

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Section: Experimental Approachesmentioning

confidence: 99%

Coherent Conversion Between Microwave and Optical Photons—An Overview of Physical Implementations

et al. 2019

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“…Alternatively, our proposal can be implemented in an optical system such as a whispering-gallerymode (WGM) microresonator coupled to a mechanical breathing mode [59][60][61][62][63][64][65]. The WGM microresonator made from nonlinear crystals exhibits strong optical nonlinearities [66][67][68], which is the essential requirement for squeezing. The squeezed-vacuum reservoir for the optical cavity can be prepared by pumping a nonlinear medium, e.g., periodically-poled KTiOPO 4 (PPKTP) crystal, in a cavity [69][70][71][72].…”

Section: Possible Implementationsmentioning

confidence: 99%

Emission of photon pairs by mechanical stimulation of the squeezed vacuum

et al. 2019

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To observe the dynamical Casimir effect (DCE) induced by a moving mirror is a long-standing challenge because the mirror velocity needs to approach the speed of light. Here, we present an experimentally feasible method for observing this mechanical DCE in an optomechanical system. It employs a detuned, parametric driving to squeeze a cavity mode, so that the mechanical mode, with a typical resonance frequency, can parametrically and resonantly couple to the squeezed cavity mode, thus leading to a resonantly amplified DCE in the squeezed frame. The DCE process can be interpreted as mechanically-induced two-photon hyper-Raman scattering in the laboratory frame. Specifically, a photon pair of the parametric driving absorbs a single phonon and then is scattered into an anti-Stokes sideband. We also find that the squeezing, which additionally induces and amplifies the DCE, can be extremely small. Our method requires neither an ultra-high mechanical-oscillation frequency (i.e., a mirror moving at nearly the speed of light) nor an ultrastrong single-photon optomechanical coupling and, thus, could be implemented in a wide range of physical systems.

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“…Notably, the resulting tensor shows that different SHG processes with ∆𝑚 = ±1 are expected either with copolarized (TE) fundamental and SH fields 22 (elements 𝑎) or with cross polarized modes (element 𝑐). 19,33,34 As a conclusion, we used the TSAM description of light in planar WGM resonators to explicit the Berry phase experienced by the spin up and spin down components of the field during their revolution into the resonator. This Berry phase is found to be at the origin of the additional quanta appearing in the quasi-phase matching conditions of nonlinear 2 nd order processes in these devices for many different materials.…”

Section: Introductionmentioning

confidence: 99%

Generalization of Second-Order Quasi-Phase Matching in Whispering Gallery Mode Resonators Using Berry Phase

Lorenzo-Ruiz

Léger

2020

ACS Photonics

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Second-order nonlinearities in whispering gallery mode resonators are highly investigated for their many applications such as wavelength converters, entangled photon sources, and generation of frequency combs. In such systems, depending on the material under scrutiny, the derivation of quasi-phase matching equations can lead to the appearance of additional quanta in the selection rule on the azimuthal confinement order. Here, we demonstrate that these additional quanta show up due to the Berry phase experienced by the transverse spin angular momentum components of the whispering gallery modes during their circulation within the resonator. We first detail the case of Zinc-blende materials and then generalize this theory to other crystal symmetries relevant for integrated photonics

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Selective Coupling Enhances Harmonic Generation of Whispering-Gallery Modes

Cited by 16 publications

References 24 publications

Coherent Conversion Between Microwave and Optical Photons—An Overview of Physical Implementations

Coherent Conversion Between Microwave and Optical Photons—An Overview of Physical Implementations

Emission of photon pairs by mechanical stimulation of the squeezed vacuum

Generalization of Second-Order Quasi-Phase Matching in Whispering Gallery Mode Resonators Using Berry Phase

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