Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

ICTON Mediterranean Winter Conference (ICTON-MW)

All-optical switching by entangling quantum dot states in a photonic crystal cavity

Gianluca Manzacca, Kurt Hingerl, Gabriella Cincotti

Published Dec 1, 2007• 1 citation
Publisher

Abstract

We analyze the behaviour of a quantum dot embedded in a photonic crystal add-drop filter and in a direct coupled photonic crystal microcavity for optical signal processing applications. The joint effect of dipole induced transparency and electromagnetic induced transparency, considering a cascade configuration of the quantum dot, are used to modify the behaviour of the whole system. The mathematical model and a number of different conditions for tuning the frequency response of the filters are derived for application in all-optical switching and wavelength tunable devices.

DOI
10.1109/ictonmw.2007.4446933

Related papers

Ultrafast switching by controlling Rabi splitting

Gianluca Manzacca, Gabriella Cincotti, Kurt Hingerl

We analyze the behavior of a quantum dot embedded in an add-drop filter for optical signal processing applications. The joint effects of dipole induced transparency and electromagnetic induced transparency, which shift the transparency peak induced by a dipole in an add-drop filter due to vacuum Rabi splitting, have been considered. The mathematical model and some different conditions for tuning the transparency peak are derived for application to all optical switching and wavelength tunable devices.

Applied Physics Letters•Dec 3, 2007•23 citations

Single-photon all-optical switching using waveguide-cavity quantum electrodynamics

Peter A. Bermel, Alejandro W. Rodríguez, Steven G. Johnson +2 more

This paper demonstrates switching of a single signal photon by a single gating photon of a different frequency, via a cross-phase-modulation. This effect is mediated by materials exhibiting electromagnetically induced transparency (EIT), which are embedded in photonic crystals (PhCs). An analytical model based on waveguide-cavity QED is constructed for our system, which consists of a PhC waveguide and a PhC microcavity containing a four-level EIT atom. It is solved exactly and analyzed using experimentally accessible parameters. It is found that the strong coupling regime is required for lossless two-photon quantum entanglement.

Physical Review A•Oct 24, 2006•137 citations

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

Sajia Yeasmin, Sabur A. Barbhuiya, Aranya B. Bhattacherjee +1 more

Abstract We theoretically study the dynamical change in the amplification of the output probe field spectra of a hybrid optomechanical system consisting of double mechanical modes coupled to a photonic crystal (PhC) nanocavity. The PhC cavity is also embedded with a quantum dot (QD) (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.

Journal of Optics•May 23, 2023•2 citations

Quantum Optical-Effect-Based Tunable Switches and Delay Lines

Gianluca Manzacca, Kurt Hingerl, Gabriella Cincotti

We demonstrate that fast tunable optical switches and tunable slow-light devices can be designed as optical cavities entangled with quantum dots. We derive the analytical conditions for switching and tuning the filter transmittance, considering both dipole-induced transparency and electromagnetic-induced transparency effects.

IEEE Journal of Quantum Electronics•Aug 1, 2008•4 citations

Tunable All-Optical Filtering and Buffering in a Coupled Quantum Dot-Planar Photonic Crystal Structure

Yong Qian, Qian Jun, Yuzhu Wang

We theoretically investigate controlled tunable all-optical filtering and buffering of optical pulses in a hybrid nano-photonic structure, where a single quantum dot (QD) embedded in a photonic crystal nanocavity is side-coupled between a bare nanocavity and a photonic crystal waveguide. We demonstrate that there is a sharp low-loss transmission peak in the transmission spectrum under even low QD-nanocavity coupling strength and the input optical pulses can be delayed up to several hundred picoseconds within the dephasing time of the QD. The filtering regime can be shifted readily by manipulating the detuning between the QD excitonic transition frequency and resonant frequency of the nanocavity mode, which can be explored in future for on-chip all-optical logic and signal processing.

Chinese Physics Letters•Aug 1, 2009•3 citations

Tunable optical multistability and absorption in a hybrid optomechanical system assisted by an auxiliary cavity and quantum dot molecules

Surabhi Yadav, Aranya B. Bhattacherjee

Abstract Coherent and tunable light-matter interaction in cavity quantum electrodynamics (C-QED) has attracted much attention for its fundamental importance and applications in emerging areas of quantum technologies. In this work, we propose a hybrid C-QED system comprising embedded quantum dot molecules (QDMs) in a primary photonic crystal (PhC) optomechanical cavity, which is further coupled to an auxiliary PhC cavity via a single-mode waveguide. We investigate the effect of the QDMs, mechanical oscillator, and the feedback from the auxiliary cavity on the multistability response shown by the mean intracavity photons in the primary optomechanical cavity. Tuning the various system parameters can control optical multistability. We further study the absorption spectra showing distinct characteristics of negative absorption (transparency dip), which strongly depend on mechanical resonator frequency. Thus, the proposed model is valuable for practically realizing efficient all-optical switching devices at low power and in various other quantum sensing devices.

Physica Scripta•Jan 4, 2023•6 citations
We analyze the behaviour of a quantum dot embedded in a photonic crystal add-drop filter and in a direct coupled photonic crystal microcavity for optical signal processing applications. The joint effect of dipole induced transparency and electromagnetic induced transparency, considering a cascade configuration of the quantum dot, are used to modify the behaviour of the whole system. The mathematical model and a number of different conditions for tuning the frequency response of the filters are derived for application in all-optical switching and wavelength tunable devices.
We analyze the behavior of a quantum dot embedded in an add-drop filter for optical signal processing applications. The joint effects of dipole induced transparency and electromagnetic induced transparency, which shift the transparency peak induced by a dipole in an add-drop filter due to vacuum Rabi splitting, have been considered. The mathematical model and some different conditions for tuning the transparency peak are derived for application to all optical switching and wavelength tunable devices.
This paper demonstrates switching of a single signal photon by a single gating photon of a different frequency, via a cross-phase-modulation. This effect is mediated by materials exhibiting electromagnetically induced transparency (EIT), which are embedded in photonic crystals (PhCs). An analytical model based on waveguide-cavity QED is constructed for our system, which consists of a PhC waveguide and a PhC microcavity containing a four-level EIT atom. It is solved exactly and analyzed using experimentally accessible parameters. It is found that the strong coupling regime is required for lossless two-photon quantum entanglement.
Abstract We theoretically study the dynamical change in the amplification of the output probe field spectra of a hybrid optomechanical system consisting of double mechanical modes coupled to a photonic crystal (PhC) nanocavity. The PhC cavity is also embedded with a quantum dot (QD) (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.
We theoretically investigate controlled tunable all-optical filtering and buffering of optical pulses in a hybrid nano-photonic structure, where a single quantum dot (QD) embedded in a photonic crystal nanocavity is side-coupled between a bare nanocavity and a photonic crystal waveguide. We demonstrate that there is a sharp low-loss transmission peak in the transmission spectrum under even low QD-nanocavity coupling strength and the input optical pulses can be delayed up to several hundred picoseconds within the dephasing time of the QD. The filtering regime can be shifted readily by manipulating the detuning between the QD excitonic transition frequency and resonant frequency of the nanocavity mode, which can be explored in future for on-chip all-optical logic and signal processing.
Abstract Coherent and tunable light-matter interaction in cavity quantum electrodynamics (C-QED) has attracted much attention for its fundamental importance and applications in emerging areas of quantum technologies. In this work, we propose a hybrid C-QED system comprising embedded quantum dot molecules (QDMs) in a primary photonic crystal (PhC) optomechanical cavity, which is further coupled to an auxiliary PhC cavity via a single-mode waveguide. We investigate the effect of the QDMs, mechanical oscillator, and the feedback from the auxiliary cavity on the multistability response shown by the mean intracavity photons in the primary optomechanical cavity. Tuning the various system parameters can control optical multistability. We further study the absorption spectra showing distinct characteristics of negative absorption (transparency dip), which strongly depend on mechanical resonator frequency. Thus, the proposed model is valuable for practically realizing efficient all-optical switching devices at low power and in various other quantum sensing devices.