The University of Southampton
University of Southampton Institutional Repository

Enhanced spontaneous emission from two-photon-pumped quantum dots in a porous silicon microcavity

Enhanced spontaneous emission from two-photon-pumped quantum dots in a porous silicon microcavity
Enhanced spontaneous emission from two-photon-pumped quantum dots in a porous silicon microcavity
Photoluminescence (PL)-based sensing techniques have been significantly developed in practice due to their key advantages in terms of sensitivity and versatility of the approach. Recently, various nanostructured and hybrid materials have been used to improve the PL quantum yield and the spectral resolution. The near-infrared (NIR) fluorescence excitation has attracted much attention because it offers deep tissue penetration and it avoids the autofluorescence of the biological samples. In our study, we have shown both spectral and temporal PL modifications under two-photon excitation of quantum dots (QDs) placed in one-dimensional porous silicon photonic crystal (PhC) microcavities. We have demonstrated an up-to-4.3-fold Purcell enhancement of the radiative relaxation rate under two-photon excitation. The data show that the use of porous silicon PhC microcavities operating in the weak coupling regime permits the enhancement of the PL quantum yield of QDs under two-photon excitation, thus extending the limits of their biosensing applications in the NIR region of the optical spectrum.
0146-9592
5364-5367
Dovzhenko, Dmitrii
95415e1a-b863-4462-b4bc-78f1ca490352
Krivenkov, Victor
f96251c7-2698-4fbd-ab43-508e99bc92cf
Kriukova, Irina
c37643a7-73db-406b-8895-f7662f4f7d10
Samokhvalov, Pavel
045c7cbe-e20c-47b6-8f43-ba045ff555a0
Karaulov, Alexander
a442bed5-c503-4be8-b76b-61e3448af4a3
Nabiev, Igor
9c67cc2d-2b48-4196-a0f8-35f4c69c2db8
Dovzhenko, Dmitrii
95415e1a-b863-4462-b4bc-78f1ca490352
Krivenkov, Victor
f96251c7-2698-4fbd-ab43-508e99bc92cf
Kriukova, Irina
c37643a7-73db-406b-8895-f7662f4f7d10
Samokhvalov, Pavel
045c7cbe-e20c-47b6-8f43-ba045ff555a0
Karaulov, Alexander
a442bed5-c503-4be8-b76b-61e3448af4a3
Nabiev, Igor
9c67cc2d-2b48-4196-a0f8-35f4c69c2db8

Dovzhenko, Dmitrii, Krivenkov, Victor, Kriukova, Irina, Samokhvalov, Pavel, Karaulov, Alexander and Nabiev, Igor (2020) Enhanced spontaneous emission from two-photon-pumped quantum dots in a porous silicon microcavity. Optics Letters, 45 (19), 5364-5367. (doi:10.1364/OL.400300).

Record type: Article

Abstract

Photoluminescence (PL)-based sensing techniques have been significantly developed in practice due to their key advantages in terms of sensitivity and versatility of the approach. Recently, various nanostructured and hybrid materials have been used to improve the PL quantum yield and the spectral resolution. The near-infrared (NIR) fluorescence excitation has attracted much attention because it offers deep tissue penetration and it avoids the autofluorescence of the biological samples. In our study, we have shown both spectral and temporal PL modifications under two-photon excitation of quantum dots (QDs) placed in one-dimensional porous silicon photonic crystal (PhC) microcavities. We have demonstrated an up-to-4.3-fold Purcell enhancement of the radiative relaxation rate under two-photon excitation. The data show that the use of porous silicon PhC microcavities operating in the weak coupling regime permits the enhancement of the PL quantum yield of QDs under two-photon excitation, thus extending the limits of their biosensing applications in the NIR region of the optical spectrum.

Text
Enhanced spontaneous emission from two-photon-pumped quantum dots in a porous silicon microcavity - Accepted Manuscript
Restricted to Repository staff only until 21 September 2021.
Request a copy

More information

Accepted/In Press date: 19 August 2020
e-pub ahead of print date: 21 September 2020

Identifiers

Local EPrints ID: 445096
URI: http://eprints.soton.ac.uk/id/eprint/445096
ISSN: 0146-9592
PURE UUID: 7dc4f16c-43dc-4df3-9eea-79f9ca8d079a

Catalogue record

Date deposited: 19 Nov 2020 17:32
Last modified: 24 Nov 2020 17:35

Export record

Altmetrics

Contributors

Author: Victor Krivenkov
Author: Irina Kriukova
Author: Pavel Samokhvalov
Author: Alexander Karaulov
Author: Igor Nabiev

University divisions

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

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×