Bidirectional conversion between microwave and light via ferromagnetic magnons

Hisatomi, Ryusuke; Osada, Alto; Tabuchi, Yoshihiko; Ishikawa, T.; Noguchi, Atsushi; Yamazaki, Rekishu; Usami, Koji; Nakamura, Y.

doi:10.1103/physrevb.93.174427

Cited by 435 publications

(337 citation statements)

References 41 publications

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“…The mechanism behind the optomagnonic coupling is the Faraday effect, where the angle of polarization of the light changes as it propagates through a magnetic material. Very recent first experiments in this regime show that this is a promising route, by demonstrating coupling between optical modes and magnons, and advances in this field are expected to develop rapidly [23][24][25][26][27]. models.…”

Section: Introductionmentioning

confidence: 99%

Coupled spin-light dynamics in cavity optomagnonics

Kusminskiy¹,

2016

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Experiments during the past two years have shown strong resonant photon-magnon coupling in microwave cavities, while coupling in the optical regime was demonstrated very recently for the first time. Unlike with microwaves, the coupling in optical cavities is parametric, akin to optomechanical systems. This line of research promises to evolve into a new field of optomagnonics, aimed at the coherent manipulation of elementary magnetic excitations by optical means. In this work we derive the microscopic optomagnonic Hamiltonian. In the linear regime the system reduces to the well-known optomechanical case, with remarkably large coupling. Going beyond that, we study the optically induced nonlinear classical dynamics of a macrospin. In the fast cavity regime we obtain an effective equation of motion for the spin and show that the light field induces a dissipative term reminiscent of Gilbert damping. The induced dissipation coefficient however can change sign on the Bloch sphere, giving rise to self-sustained oscillations. When the full dynamics of the system is considered, the system can enter a chaotic regime by successive period doubling of the oscillations.

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Section: Introductionmentioning

confidence: 99%

Coupled spin-light dynamics in cavity optomagnonics

Kusminskiy¹,

2016

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“…29 Magnons in YIG are potentially useful as an interface to exchange quantum information between microwave and optical photons. 30 In this paper, we studied a transparent magnetic garnet film that was originally designed for a commercial Faraday rotator at optical communication wavelengths, from the point of view of atomic physics. The magnetic garnet film we investigated had a small optical loss at a wavelength of λ = 780 nm resonant with the D 2 transition of Rb atoms.…”

Section: Introductionmentioning

confidence: 99%

Optical and magnetic properties of a transparent garnet film for atomic physics experiments

et al. 2016

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We investigated the optical and magnetic properties of a transparent magnetic garnet with a particular focus on its applications to atomic physics experiments. The garnet film used in this study was a magnetically soft material that was originally designed for a Faraday rotator at optical communication wavelengths in the near infrared region. The film had a thickness of 2.1 μm and a small optical loss at a wavelength of λ=780 nm resonant with Rb atoms. The Faraday effect was also small and, thus, barely affected the polarization of light at λ=780 nm. In contrast, large Faraday rotation angles at shorter wavelengths enabled us to visualize magnetic domains, which were perpendicularly magnetized in alternate directions with a period of 3.6 μm. We confirmed the generation of an evanescent wave on the garnet film, which can be used for the optical observation and manipulation of atoms on the surface of the film. Finally, we demonstrated a magnetic mirror for laser-cooled Rb atoms using the garnet film.

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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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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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Bidirectional conversion between microwave and light via ferromagnetic magnons

Cited by 435 publications

References 41 publications

Coupled spin-light dynamics in cavity optomagnonics

Coupled spin-light dynamics in cavity optomagnonics

Optical and magnetic properties of a transparent garnet film for atomic physics experiments

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

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