Two-photon interference from a quantum emitter in hexagonal boron nitride

Abstract

Recently discovered quantum emitters in two-dimensional (2D) materials have opened new perspectives of integrated photonic devices for quantum information. Most of these applications require the emitted photons to be indistinguishable, which has remained elusive in 2D materials. Here, we investigate two-photon interference of a quantum emitter generated in hexagonal boron nitride (hBN) using an electron beam. We measure the correlations of zero-phonon-line photons in a Hong-Ou-Mandel (HOM) interferometer under non-resonant excitation. We find that the emitted photons exhibit a partial indistinguishability of $0.44\pm 0.11$ in a 3 ns time window, which corresponds to a corrected value of $0.56\pm 0.11$ after accounting for imperfect emitter purity. The dependence of the HOM visibility on the width of the post-selection time window allows us to estimate the dephasing time of the emitter to be $\sim 1.5$ ns, about half the limit set by spontaneous emission. A visibility above 90 % is under reach using Purcell effect with up-to-date 2D material photonics.

References in corpus (23)

• Van der Waals heterostructures
• QuTiP 2: A Python framework for the dynamics of open quantum systems
• Quantum Communication
• QuTiP: An open-source Python framework for the dynamics of open quantum systems
• Near optimal single photon sources in the solid state
• Heralded entanglement between solid-state qubits separated by 3 meters
• Creation of entangled states of distant atoms by interference
• Indistinguishable photons from separated silicon-vacancy centers in diamond
• Quantum dot single photon sources: Prospects for applications in linear optics quantum information processing
• Generation of heralded entanglement between distant hole spins
• Quantum interference of single photons from remote nitrogen-vacancy centers in diamond
• Two-photon interference: the Hong-Ou-Mandel effect
• Efficient single photon emission from a high-purity hexagonal boron nitride crystal
• Position-controlled quantum emitters with reproducible emission wavelength in hexagonal boron nitride
• Quantum Teleportation from a Propagating Photon to a Solid-State Spin Qubit
• Two-photon interference from a bright single photon source at telecom wavelengths
• Spin-controlled generation of indistinguishable and distinguishable photons from silicon vacancy centres in silicon carbide
• Purcell-enhanced single photon source based on a deterministically placed WSe${}_2$ monolayer quantum dot in a circular Bragg grating cavity
• Blue-Light-Emitting Color Centers in High-Quality Hexagonal Boron Nitride
• Coherence and indistinguishability of highly pure single photons from non-resonantly and resonantly excited telecom C-band quantum dots
• Dynamical modeling of pulsed two-photon interference
• Measuring the photon coalescence time-window in the continuous-wave regime for resonantly driven semiconductor quantum dots
• Two-photon interference from remote deterministic quantum dot microlenses

Cited by in corpus (16)

• Roadmap for Photonics with 2D Materials
• Quantum Optics Applications of Hexagonal Boron Nitride Defects
• Quantum interferometers: principles and applications
• Investigating the fast spectral diffusion of a quantum emitter in hBN using resonant excitation and photon correlations
• Polarization dynamics of solid-state quantum emitters
• Top-down integration of a hBN quantum emitter in a monolithic photonic waveguide
• Single-photon emitters in WSe${}_2$: Critical role of phonons on excitation schemes and indistinguishability
• Quantum efficiency and vertical position of quantum emitters in hBN determined by Purcell effect in hybrid metal-dielectric planar photonic structures
• Creation and Microscopic Origins of Single-Photon Emitters in Transition Metal Dichalcogenides and Hexagonal Boron Nitride
• The effect of electron-phonon interactions on the spectral properties of single defects in hexagonal boron nitride
• Room temperature quantum emitters in van der Waals α-MoO3
• Many-Body Entanglement in Solid-State Emitters
• Perovskite Nanocrystals as Emerging Single-Photon Emitters: Progress, Challenges, and Opportunities
• Deterministic generation of single B centers in hBN by one-to-one conversion from UV centers
• Spin-photon Qubits for Scalable Quantum Network
• Photon correlation Fourier spectroscopy of a B center in hBN