Mechanical Decoupling of Quantum Emitters in Hexagonal Boron Nitride
from Low-Energy Phonon Modes
- URL: http://arxiv.org/abs/2004.10826v1
- Date: Wed, 22 Apr 2020 20:00:49 GMT
- Title: Mechanical Decoupling of Quantum Emitters in Hexagonal Boron Nitride
from Low-Energy Phonon Modes
- Authors: Michael Hoese, Prithvi Reddy, Andreas Dietrich, Michael K. Koch,
Konstantin G. Fehler, Marcus W. Doherty, Alexander Kubanek
- Abstract summary: Quantum emitters in hexagonal Boron Nitride (hBN) were recently reported to hol a homogeneous linewidth according to the Fourier-Transform limit up to room temperature.
This unusual observation was traced back to decoupling from in-plane phonon modes which can arise if the emitter is located between two planes of the hBN host material.
- Score: 52.77024349608834
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: Quantum emitters in hexagonal Boron Nitride (hBN) were recently reported to
hol a homogeneous linewidth according to the Fourier-Transform limit up to room
temperature. This unusual observation was traced back to decoupling from
in-plane phonon modes which can arise if the emitter is located between two
planes of the hBN host material. In this work, we investigate the origins for
the mechanical decoupling. Improved sample preparation enabled a reduced
background and a 70-fold decrease of spectral diffusion which was so far the
major drawback of defect center in hBN and allowed us to reveal a gap in the
electron-phonon spectral density for low phonon frequencies. This decoupling
from phonons persists at room temperature and explains the observed Fourier
Transform limited lines up to 300K. Furthermore, we investigate the dipole
emission directionality and show a preferred photon emission through the side
of the hBN flakes supporting the claim for an out-of-plane distortion of the
defect center. Our work lays the foundation to a deeper understanding of the
underlying physics for the persistence of Fourier-Transform limit lines up to
room temperature. It furthermore provides a description on how to identify the
mechanically isolated emitter within the large number of defect centers in hBN.
Therefore, it paves the way for quantum optics applications with defect centers
in hBN at room temperature.
Related papers
- Site-Controlled Purcell-Induced Bright Single Photon Emitters in Hexagonal Boron Nitride [62.170141783047974]
Single photon emitters hosted in hexagonal boron nitride (hBN) are essential building blocks for quantum photonic technologies that operate at room temperature.
We experimentally demonstrate large-area arrays of plasmonic nanoresonators for Purcell-induced site-controlled SPEs.
Our results offer arrays of bright, heterogeneously integrated quantum light sources, paving the way for robust and scalable quantum information systems.
arXiv Detail & Related papers (2024-05-03T23:02:30Z) - A first-principles calculation of electron-phonon interactions for the
$\text{C}_2\text{C}_\text{N}$ and $\text{V}_\text{N}\text{N}_\text{B}$
defects in hexagonal boron nitride [52.77024349608834]
Quantum emitters in two-dimensional hexagonal boron nitride (h-BN) have generated significant interest.
Recent observations of Fourier transform (FT) limited photons emitted from h-BN flakes at room temperature.
arXiv Detail & Related papers (2022-07-28T23:31:38Z) - Review on coherent quantum emitters in hexagonal boron nitride [91.3755431537592]
I discuss the state-of-the-art of defect centers in hexagonal boron nitride with a focus on optically coherent defect centers.
The spectral transition linewidth remains unusually narrow even at room temperature.
The field is put into a broad perspective with impact on quantum technology such as quantum optics, quantum photonics as well as spin optomechanics.
arXiv Detail & Related papers (2022-01-31T12:49:43Z) - Excited-state spectroscopy of spin defects in hexagonal boron nitride [20.739656944743345]
We probed electron-spin resonance transitions in the excited state of negatively-charged boron vacancy defects in hexagonal boron nitride (hBN) at room temperature.
The data showed that the excited state has a zero-field splitting of 2.1 GHz, a g factor similar to the ground state and two types of hyperfine splitting 90 MHz and 18.8 MHz respectively.
Negative peaks in photoluminescence and ODMR contrast as a function of magnetic field magnitude and angle at level anti-crossing were observed and explained by coherent spin precession and anisotropic relaxation.
arXiv Detail & Related papers (2021-12-06T10:28:57Z) - Cavity Quantum Electrodynamics Design with Single Photon Emitters in
Hexagonal Boron Nitride [6.352389759470726]
We numerically investigate the cavity quantum electrodynamics (cavity-QED) scheme incorporating defect-enabled single photon emitters in h-BN microdisk resonators.
The whispering-gallery nature of microdisks can support multiple families of cavity resonances with different radial and azimuthal mode indices simultaneously.
This study contributes toward realizing h-BN photonic components, such as low-threshold microcavity lasers and high-purity single photon sources.
arXiv Detail & Related papers (2021-06-05T21:53:44Z) - Coupling spin defects in hexagonal boron nitride to monolithic bullseye
cavities [0.9865297101789609]
We demonstrate the efficient coupling of recently discovered spin defects in hBN to purposely designed bullseye cavities.
We show that the all monolithic hBN cavity system exhibits an order of magnitude enhancement in the emission of the coupled boron vacancy spin defects.
arXiv Detail & Related papers (2021-05-26T03:56:02Z) - Phonon dephasing and spectral diffusion of quantum emitters in hexagonal
Boron Nitride [52.915502553459724]
Quantum emitters in hexagonal boron nitride (hBN) are emerging as bright and robust sources of single photons for applications in quantum optics.
We study phonon dephasing and spectral diffusion of quantum emitters in hBN via resonant excitation spectroscopy at cryogenic temperatures.
arXiv Detail & Related papers (2021-05-25T05:56:18Z) - Nitrogen-vacancy defect emission spectra in the vicinity of an
adjustable silver mirror [62.997667081978825]
Optical emitters of quantum radiation in the solid state are important building blocks for emerging technologies.
We experimentally study the emission spectrum of an ensemble of nitrogen-vacancy defects implanted around 8nm below the planar diamond surface.
arXiv Detail & Related papers (2020-03-31T10:43:26Z)
This list is automatically generated from the titles and abstracts of the papers in this site.
This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.