Surface plasmon enhanced upconversion luminescence for biosensing applications

Duc Le; Marjut Kreivi; Sanna Aikio; Jarno Petäjä; Sanna Uusitalo; Tianlong Guo; Matthieu Roussey; Jussi Hiltunen

doi:10.1117/12.2647339

16 March 2023 Surface plasmon enhanced upconversion luminescence for biosensing applications

Duc Le, Marjut Kreivi, Sanna Aikio, Jarno Petäjä, Sanna Uusitalo, Tianlong Guo, Matthieu Roussey, Jussi Hiltunen

Proceedings Volume 12396, Plasmonics in Biology and Medicine XX; 1239604 (2023) https://doi.org/10.1117/12.2647339
Event: SPIE BiOS, 2023, San Francisco, California, United States

Abstract

Upconversion (UC) luminescence sensing is a technique to improve the detection limit of conventional fluorescence in biosensing that is commonly limited by the autofluorescence-generated background signal. The main limitation of UC materials is their low wavelength conversion efficiency. Many studies have been made to enhance the efficiency of UC materials by optimizing light absorption and energy transfer processes. However, rather low efficiency remains an issue limiting the practical usage of UC materials in biosensors. Plasmon enhancement is a way to improve UC photoluminescence by enhancing the excitation and emission rates. In this study, we modeled and fabricated gold gratings for exciting surface plasmon polaritons (SPPs) at 976-nm wavelength. We aim at increasing the local optical intensity at the locations of UC nanoparticles on a nano-structured plasmonic surface. The UC nanoparticles were adsorbed on the gratings via biomolecule conjugation. UC photoluminescence on the gratings was compared with flat gold surfaces. Experimentally, we achieved UC enhancement up to 70, which is relatively high in comparison with other plasmon-enhanced UC techniques presented in the literature. The results of our work can be applied in various biosensing applications in which low excitation intensity is preferred.

Conference Presentation

Citation Download Citation

Duc Le, Marjut Kreivi, Sanna Aikio, Jarno Petäjä, Sanna Uusitalo, Tianlong Guo, Matthieu Roussey, and Jussi Hiltunen "Surface plasmon enhanced upconversion luminescence for biosensing applications", Proc. SPIE 12396, Plasmonics in Biology and Medicine XX, 1239604 (16 March 2023); https://doi.org/10.1117/12.2647339

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available