Optical response in a double quantum dot molecule inside a nonlinear photonic crystal cavity

Bhatt, Vijay; Yadav, Surabhi; Jha, Pradip K.; Bhattacherjee, Aranya B.

doi:10.1016/j.photonics.2022.101043

Cited by 4 publications

(2 citation statements)

References 71 publications

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“…The QD is approximated as a two-level system with a ground state |1 > and a single excited state |2 > and can be characterised by the pseudospin operators σ ± and σ z . A proper approximate representation of the mentioned two-level system is analogous to a QD molecule [61], which when coupled to a hybrid system affects both the output optical probe field and the displacement spectrum of the mechanical modes. Here, the optical mode of the PhC cavity is coherently driven by a strong pump field with frequency ω p and a weak probe field with frequency ω s .…”

Section: Theoretical Frameworkmentioning

confidence: 99%

Coupling of QD-based PhC nanocavity with two mechanical modes: an approach to tunable optical switching and sensing applications

Yeasmin

Barbhuiya

Bhattacherjee

et al. 2023

J. Opt.

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We theoretically study the dynamical change in the ampliﬁcation of the output probe ﬁeld spectra of a hybrid optomechanical system consisting of two mechanical modes coupled to a photonic crystal (PhC) nanocavity. The PhC cavity is also embedded with a quantum dot (two-level system) and simultaneously driven by an external pump and a probe ﬁeld. We show that multiple number of transparency windows that appear can be controlled by the QD-cavity coupling strength and also the Fano proﬁles are directly measured by the resonant frequency of the mechanical mode. We also show the optical transition from bistability to tristability/multistability by adjusting the switching threshold of the system parameters. These results can also be used to study frequency optical nonreciprocity and all-optical switches in multi-resonator photonic devices.

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Section: Theoretical Frameworkmentioning

confidence: 99%

Coupling of QD-based PhC nanocavity with two mechanical modes: an approach to tunable optical switching and sensing applications

Yeasmin

Barbhuiya

Bhattacherjee

et al. 2023

J. Opt.

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“…Further, another study on bistability using coupled double quantum dot system (CDQD) found that the cavity field is bistable for a higher value of cavity-dot coupling. [25,93,94] In this paper, we have compared the (H-P) transform method used in many studies [88,89] with a numerical method to solve the multiple quantum dot optomechanical system for generating optical bistability and absorption response. We study the bistable behavior of our optomechanical system using both techniques.…”

Section: Introductionmentioning

confidence: 99%

Holstein–Primakoff (H‐P) Approach to Determine the Optical Response of Hybrid Optomechanical System Containing Multiple Quantum Dots

et al. 2023

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A theoretical model is presented to study the hybrid optomechanical system comprising an ensemble of N number of quantum dots (QDs). Utilizing the Holstein-Primakoff (H-P) transformation formalism, the calculations become easily scalable. The bistability in this hybrid optomechanical system is studied in the presence of third order nonlinear 𝝌 (3) medium using the H-P transformation method and to verify the results, numerical method has also been utilized. It is also demonstrated that the system's parameters may be tuned to alter the bistability phenomenon and absorption spectrum's response, which exhibits both positive and negative absorption (emission). This alternative approach (H-P transform) is demonstrated to solve analytically the system containing multiple QDs in an elegant manner.

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Optical Properties of SAW-Driven Optomechanical Nanostructure

Bhatt,

Yadav,

Jha

et al. 2024

Int J Theor Phys

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Optical response in a double quantum dot molecule inside a nonlinear photonic crystal cavity

Cited by 4 publications

References 71 publications

Coupling of QD-based PhC nanocavity with two mechanical modes: an approach to tunable optical switching and sensing applications

Coupling of QD-based PhC nanocavity with two mechanical modes: an approach to tunable optical switching and sensing applications

Holstein–Primakoff (H‐P) Approach to Determine the Optical Response of Hybrid Optomechanical System Containing Multiple Quantum Dots

Optical Properties of SAW-Driven Optomechanical Nanostructure

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