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Upconversion Nanocrystal Doped Polymer Fiber Thermometer. SENSORS 2020; 20:s20216048. [PMID: 33114281 PMCID: PMC7660634 DOI: 10.3390/s20216048] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/04/2020] [Revised: 10/16/2020] [Accepted: 10/20/2020] [Indexed: 11/27/2022]
Abstract
In recent years, lanthanide-doped nanothermometers have been mainly used in thin films or dispersed in organic solvents. However, both approaches have disadvantages such as the short interaction lengths of the active material with the pump beam or complicated handling, which can directly affect the achievable temperature resolution. We investigated the usability of a polymer fiber doped with upconversion nanocrystals as a thermometer. The fiber was excited with a wavelength stabilized diode laser at a wavelength of 976 nm. Emission spectra were recorded in a temperature range from 10 to 35 ∘C and the thermal emission changes were measured. Additionally, the pump power was varied to study the effect of self-induced heating on the thermometer specifications. Our fiber sensor shows a maximal thermal sensitivity of 1.45%/K and the minimal thermal resolution is below 20 mK. These results demonstrate that polymer fibers doped with nanocrystals constitute an attractive alternative to conventional fluorescence thermometers, as they add a long pump interaction length while also being insensitive to strong electrical fields or inert to bio-chemical environments.
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Spelthann S, Unland S, Thiem J, Jakobs F, Kielhorn J, Ang PY, Johannes HH, Kracht D, Neumann J, Ruehl A, Kowalsky W, Ristau D. Towards Highly Efficient Polymer Fiber Laser Sources for Integrated Photonic Sensors. SENSORS 2020; 20:s20154086. [PMID: 32707919 PMCID: PMC7435363 DOI: 10.3390/s20154086] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Revised: 07/09/2020] [Accepted: 07/17/2020] [Indexed: 11/22/2022]
Abstract
Lab-on-a-Chip (LoC) devices combining microfluidic analyte provision with integrated optical analysis are highly desirable for several applications in biological or medical sciences. While the microfluidic approach is already broadly addressed, some work needs to be done regarding the integrated optics, especially provision of highly integrable laser sources. Polymer optical fiber (POF) lasers represent an alignment-free, rugged, and flexible technology platform. Additionally, POFs are intrinsically compatible to polymer microfluidic devices. Home-made Rhodamine B (RB)-doped POFs were characterized with experimental and numerical parameter studies on their lasing potential. High output energies of 1.65 mJ, high slope efficiencies of 56%, and 50%-lifetimes of ≥900 k shots were extracted from RB:POFs. Furthermore, RB:POFs show broad spectral tunability over several tens of nanometers. A route to optimize polymer fiber lasers is revealed, providing functionality for a broad range of LoC devices. Spectral tunability, high efficiencies, and output energies enable a broad field of LoC applications.
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Affiliation(s)
- Simon Spelthann
- Institute of Quantum Optics, Leibniz University Hannover, 30167 Hannover, Germany; (S.S.); (J.T.); (D.R.)
- Laser Zentrum Hannover e.V., 30419 Hannover, Germany; (S.U.); (D.K.); (J.N.)
| | - Stefanie Unland
- Laser Zentrum Hannover e.V., 30419 Hannover, Germany; (S.U.); (D.K.); (J.N.)
| | - Jonas Thiem
- Institute of Quantum Optics, Leibniz University Hannover, 30167 Hannover, Germany; (S.S.); (J.T.); (D.R.)
- Laser Zentrum Hannover e.V., 30419 Hannover, Germany; (S.U.); (D.K.); (J.N.)
| | - Florian Jakobs
- Institut für Hochfrequenztechnik, TU Braunschweig, 38106 Braunschweig, Germany; (F.J.); (J.K.); (P.Y.A.); (H.-H.J.); (W.K.)
| | - Jana Kielhorn
- Institut für Hochfrequenztechnik, TU Braunschweig, 38106 Braunschweig, Germany; (F.J.); (J.K.); (P.Y.A.); (H.-H.J.); (W.K.)
| | - Pen Yiao Ang
- Institut für Hochfrequenztechnik, TU Braunschweig, 38106 Braunschweig, Germany; (F.J.); (J.K.); (P.Y.A.); (H.-H.J.); (W.K.)
| | - Hans-Hermann Johannes
- Institut für Hochfrequenztechnik, TU Braunschweig, 38106 Braunschweig, Germany; (F.J.); (J.K.); (P.Y.A.); (H.-H.J.); (W.K.)
- Academic Alliance Braunschweig - Hannover QUANOMET, 30167 Hannover, Germany
- Cluster of Excellence PhoenixD, 30167 Hannover, Germany
| | - Dietmar Kracht
- Laser Zentrum Hannover e.V., 30419 Hannover, Germany; (S.U.); (D.K.); (J.N.)
- Cluster of Excellence PhoenixD, 30167 Hannover, Germany
| | - Joerg Neumann
- Laser Zentrum Hannover e.V., 30419 Hannover, Germany; (S.U.); (D.K.); (J.N.)
- Cluster of Excellence PhoenixD, 30167 Hannover, Germany
| | - Axel Ruehl
- Institute of Quantum Optics, Leibniz University Hannover, 30167 Hannover, Germany; (S.S.); (J.T.); (D.R.)
- Laser Zentrum Hannover e.V., 30419 Hannover, Germany; (S.U.); (D.K.); (J.N.)
- Academic Alliance Braunschweig - Hannover QUANOMET, 30167 Hannover, Germany
- Correspondence:
| | - Wolfgang Kowalsky
- Institut für Hochfrequenztechnik, TU Braunschweig, 38106 Braunschweig, Germany; (F.J.); (J.K.); (P.Y.A.); (H.-H.J.); (W.K.)
- Academic Alliance Braunschweig - Hannover QUANOMET, 30167 Hannover, Germany
- Cluster of Excellence PhoenixD, 30167 Hannover, Germany
| | - Detlev Ristau
- Institute of Quantum Optics, Leibniz University Hannover, 30167 Hannover, Germany; (S.S.); (J.T.); (D.R.)
- Laser Zentrum Hannover e.V., 30419 Hannover, Germany; (S.U.); (D.K.); (J.N.)
- Academic Alliance Braunschweig - Hannover QUANOMET, 30167 Hannover, Germany
- Cluster of Excellence PhoenixD, 30167 Hannover, Germany
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Li Y, Zhang X, Zhang Y, Dong R, Luscombe CK. Review on the Role of Polymers in Luminescent Solar Concentrators. ACTA ACUST UNITED AC 2018. [DOI: 10.1002/pola.29192] [Citation(s) in RCA: 60] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Yilin Li
- Department of Materials Science and Engineering University of Washington Seattle Washington 98195
- Molecular Engineering Materials Center University of Washington Seattle Washington 98195
| | - Xueqiao Zhang
- Department of Materials Science and Engineering University of Washington Seattle Washington 98195
| | - Yongcao Zhang
- Department of Materials Science and Engineering University of Washington Seattle Washington 98195
| | - Richard Dong
- Interlake Senior High School Bellevue Washington 98008
| | - Christine K. Luscombe
- Department of Materials Science and Engineering University of Washington Seattle Washington 98195
- Molecular Engineering Materials Center University of Washington Seattle Washington 98195
- Department of Chemistry University of Washington Seattle Washington 98195
- Molecular Engineering & Sciences Institute University of Washington Seattle Washington 98195
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