Coupling to a microdisk cavity containing a three-level quantum-dot with two orthogonal modes

Mi, Xueling; Bai, Jiangxiang; Li, D.J.; Zhao, Han

doi:10.1016/j.optcom.2011.02.024

Cited by 9 publications

(10 citation statements)

References 51 publications

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“…One of the possible systems where it can be implemented is a V‐type quantum dot in a microdisk cavity or in a micropillar cavity, where the Q factors exceed 10 4 . [ 44,45 ] One can also use superconducting qubits coupled to a detection line. [ 66 ] Our work unveils quantum embedded superstates, a novel state of quantum light‐matter interaction, and suggests their use in advanced quantum‐enhanced sensors with superior noise performance.…”

Section: Discussionmentioning

confidence: 99%

“…[ 38–43 ] On the other hand, in our work we investigate a three‐level atom coupled to a cavity, a system that has been comparably less explored. Experimentally this class of systems can be realized for instance with a V‐type quantum dot embedded in a high‐Q cavity, such as a microdisk cavity or a micropillar, [ 44,45 ] or with superconducting qubits coupled to a detection line. To validate our results, we compare them with Bloch–Redfield equation approach without the secular approximation and rotating wave approximation (RWA) (see Section 4.2).…”

Section: Introductionmentioning

confidence: 99%

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Quantum Embedded Superstates

2021

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Optical supercavity modes (superstates), i.e., hybrid modes emerging from the strong coupling of two modes of an open cavity, can support ultranarrow lines in their scattering spectra associated with quasi bound states in the continuum (quasi‐BIC). These modes are of great interest for sensing applications as they enable compact systems with unprecedented sensitivity. However, classical quasi‐BIC sensors are fundamentally limited by the shot‐noise limit, which may be overcome in quantum sensors. Here, it is shown that a three‐level quantum system (e.g., atom, quantum dot, superconducting qubit) can be tailored to support the quantum analog of superstates with an unboundedly narrow emission line. Remarkably, it is demonstrated that the coupling of such a system with a cavity (e.g., plasmonic or dielectric nanoparticle, microcavity, microwave resonator) enables sensing properties with excellent statistical features. The results can be applied to a plethora of quantum platforms, from superconducting circuits to cold atoms and quantum dots, opening exciting opportunities for quantum sensing and computing.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Quantum Embedded Superstates

2021

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“…We consider a system of an axisymmetric microcavity evanescently coupled to a V-type three-level single quantum dot (QD) [17,18]. The microcavity is evanescently coupled to a waveguide so that propagating waves from one direction predominantly traverse the resonator clockwise and those from the other direction couple to counter-clockwise propagating modes.…”

Section: Model and Approachmentioning

confidence: 99%

“…This can be exploited to create non-reciprocal transmission at certain frequencies in the waveguide by having the cavity interact with a system sensitive to the helicity of the electric field. As in [17] and [18], we consider a V-type three-level system consisting of a ground state, |g , and two excited states, |e 1 and |e 2 with transitions to each excited state driven by opposite electric field helicity (Fig. 3b).…”

Section: Helicity-sensitivity In Cavity Qed -A Linearized Master Equa...mentioning

confidence: 99%

“…Traditional non-reciprocal optics exploits magnetic materials [12] and magneto-optical phenomena to break directional symmetry. Despite recent research exploring alternative realizations based on diverse mechanisms such as cavity nonlinearities [13,14], mode conversion [15], spin polarization [16], coupled atoms and quantum dots [17,18], and optomechanics [11,19], widespread implementation of non-reciprocity in integrated micro-and nano-photonics remains challenging. Major hurdles include shrinking the magnetic or nonlinear medium to the micro-or nano-scale useful for integrated optics [1] and reducing dependence on power, which can limit isolation performance in the single photon quantum regime [11].…”

Section: Introductionmentioning

confidence: 99%

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Coherent optical non-reciprocity in axisymmetric resonators

Lenferink¹,

Wei²,

Stern³

2014

Opt. Express

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We describe an approach to optical non-reciprocity that exploits the local helicity of evanescent electric fields in axisymmetric resonators. By interfacing an optical cavity to helicity-sensitive transitions, such as Zeeman levels in a quantum dot, light transmission through a waveguide becomes direction-dependent when the state degeneracy is lifted. Using a linearized quantum master equation, we analyze the configurations that exhibit non-reciprocity, and we show that reasonable parameters from existing cavity QED experiments are sufficient to demonstrate a coherent non-reciprocal optical isolator operating at the level of a single photon.

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Unidirectional Reflectionlessness and Transmissionlessness in Indirectly Coupled Whispering‐Gallery Mode Resonators

Li,

Zhang,

Jin

2024

Annalen der Physik

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The reflection and transmission characteristics of a system composed of two whispering‐gallery mode (WGM) resonators are explored. Each resonator contains a Zeeman split quantum dot and side‐couples to an optical fiber. The results indicate that the unidirectional reflectionlessness and transmissionlessness can be achieved by adjusting the coupling strength between the resonators and the optical fiber, as well as the transition rate between the counter‐propagating modes within the WGM resonators. Besides, a one‐to‐one correspondence is set up between the resonance frequencies of quantum dots' energy levels and the positions of reflectionlessness (transmissionlessness) peaks when phase shift between two WGM resonators is π. This research provides the valuable insights for the development of quantum optical devices such as isolators, circulators, and routers.

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Coupling to a microdisk cavity containing a three-level quantum-dot with two orthogonal modes

Cited by 9 publications

References 51 publications

Quantum Embedded Superstates

Quantum Embedded Superstates

Coherent optical non-reciprocity in axisymmetric resonators

Unidirectional Reflectionlessness and Transmissionlessness in Indirectly Coupled Whispering‐Gallery Mode Resonators

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