Optical gating of photoluminescence from color centers in hexagonal boron nitride
Optical gating of photoluminescence from color centers in hexagonal boron nitride
We report on multicolor excitation experiments with color centers in hexagonal boron nitride at cryogenic temperatures. We demonstrate controllable optical switching between bright and dark states of color centers emitting around 2 eV. Resonant, or quasi-resonant, excitation of photoluminescence also pumps the color center, via a two-photon process, into a dark state, where it becomes trapped. Repumping back into the bright state has a step-like spectrum with a defect-dependent threshold between 2.25 and 2.6 eV. This behavior is consistent with photoionization and charging between optically bright and dark states of the defect. Furthermore, a second zero phonon line, detuned by +0.4 eV, is observed in absorption with orthogonal polarization to the emission, evidencing an additional energy level in the color center
2D materials, Color center, hexagonal boron-nitride, single photon source
4256-4263
Khatri, Prince
9102d03d-12bc-4bca-ab2c-f4238866db60
Ramsay, Andrew
741a4a8e-189a-4dee-8074-cc481983d6e3
Malein, Ralph
a94b4b89-1b0b-4064-aa6d-47cde891707f
Chong, Harold
795aa67f-29e5-480f-b1bc-9bd5c0d558e1
Luxmoore, Isaac
7554de43-acbb-4027-9fe3-72fad0bff17c
10 June 2020
Khatri, Prince
9102d03d-12bc-4bca-ab2c-f4238866db60
Ramsay, Andrew
741a4a8e-189a-4dee-8074-cc481983d6e3
Malein, Ralph
a94b4b89-1b0b-4064-aa6d-47cde891707f
Chong, Harold
795aa67f-29e5-480f-b1bc-9bd5c0d558e1
Luxmoore, Isaac
7554de43-acbb-4027-9fe3-72fad0bff17c
Khatri, Prince, Ramsay, Andrew, Malein, Ralph, Chong, Harold and Luxmoore, Isaac
(2020)
Optical gating of photoluminescence from color centers in hexagonal boron nitride.
Nano Letters, 20 (6), .
(doi:10.1021/acs.nanolett.0c00751).
Abstract
We report on multicolor excitation experiments with color centers in hexagonal boron nitride at cryogenic temperatures. We demonstrate controllable optical switching between bright and dark states of color centers emitting around 2 eV. Resonant, or quasi-resonant, excitation of photoluminescence also pumps the color center, via a two-photon process, into a dark state, where it becomes trapped. Repumping back into the bright state has a step-like spectrum with a defect-dependent threshold between 2.25 and 2.6 eV. This behavior is consistent with photoionization and charging between optically bright and dark states of the defect. Furthermore, a second zero phonon line, detuned by +0.4 eV, is observed in absorption with orthogonal polarization to the emission, evidencing an additional energy level in the color center
Text
acs.nanolett.0c00751
- Version of Record
More information
Accepted/In Press date: 5 May 2020
e-pub ahead of print date: 8 May 2020
Published date: 10 June 2020
Additional Information:
Funding Information:
This work was supported by the Engineering and Physical Sciences Research Council (EP/S001557/1 and EP/026656/1).
Publisher Copyright:
Copyright © 2020 American Chemical Society.
Keywords:
2D materials, Color center, hexagonal boron-nitride, single photon source
Identifiers
Local EPrints ID: 440911
URI: http://eprints.soton.ac.uk/id/eprint/440911
ISSN: 1530-6984
PURE UUID: 5ec49802-0f0c-43be-b1f9-3d72f5b96bb7
Catalogue record
Date deposited: 22 May 2020 16:37
Last modified: 06 Jun 2024 01:45
Export record
Altmetrics
Contributors
Author:
Prince Khatri
Author:
Andrew Ramsay
Author:
Ralph Malein
Author:
Harold Chong
Author:
Isaac Luxmoore
Download statistics
Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.
View more statistics