Three-dimensional nanothermometry below the diffraction limit

被引：3

作者：

Thiem, J. ^{[1
,2
]}

Spelthann, S. ^{[1
,2
]}

Neumann, J. ^{[2
,3
]}

Ruehl, A. ^{[2
,4
,5
]}

Ristau, D. ^{[1
,2
,3
,5
]}

机构：

[1] Leibniz Univ Hannover, Inst Quantum Opt, Welfengarten 1, D-30167 Hannover, Germany

[2] Laser Zentrum Hannover Ev, Hollerithallee 8, D-30419 Hannover, Germany

[3] Cluster Excellence PhoenixD, Welfengarten 1, D-30167 Hannover, Germany

[4] Leibniz Univ Hannover, QUEST Leibniz Res Sch, Inst Quantum Opt, Welfengarten 1, D-30167 Hannover, Germany

[5] Acad Alliance Braunschweig Hannover QUANOMET, D-30167 Hannover, Germany

来源：

OPTICS LETTERS | 2021年 / 46卷 / 14期

关键词：

STED NANOSCOPY;

D O I：

10.1364/OL.423626

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Lanthanide-doped nanothermometers are used to measure temperature through changes in their emission characteristic with sensitivities of up to a few %/K. In contrast to their sensitivity, their spatial resolution, which is of critical importance for various applications, has not been thoroughly studied and optimized. We numerically investigated the improvement in spatial resolution of nanothermometers with a stimulated emission depletion microscopy approach. Fundamental relationships between spatial and temperature resolution were identified by using different beam parameters for the excitation and depletion beams. Our simulations predict contactless temperature measurement below the diffraction limit with temperature resolution of +/- 1.25 K. We further studied the influence of sample thickness and position on both temperature and spatial resolution and showed the potential of three-dimensional measurements. (C) 2021 Optical Society of America.

引用

页码：3352 / 3355

页数：4