High resolution imaging with anomalous saturated excitation

Bo Du; Xiang-Dong Chen; Ze-Hao Wang; Shao-Chun Zhang; En-Hui Wang; Guang-Can Guo; Fang-Wen Sun

doi:doi:10.1364/PRJ.410373

Photonics Research, 2021, 9 (1): 01000021, Published Online: Apr. 1, 2021

High resolution imaging with anomalous saturated excitation Download： 692次

Bo Du ^1,2Xiang-Dong Chen ^1,2,*Ze-Hao Wang ^1,2Shao-Chun Zhang ^1,2En-Hui Wang ^1,2Guang-Can Guo ^1,2Fang-Wen Sun ^1,2

Author Affiliations

¹ CAS Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei 230026, China

² CAS Center for Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026, China

Figures & Tables

Fig. 1. (a) Experimental setup. The pulsed 532 nm laser is circularly polarized, with a repetition rate of 5 MHz. DM: dichroic mirror; APD: avalanche photodiode. (b) The fluorescence emission of a single NV center with different laser intensities. The blue line is the fitting with Eq. (1). (c) Simulated point spread function and the spatial frequency distribution of the confocal microscopy with different powers. (d) The normalized spatial frequency with the excitation power of 0.06 and 1.2 mW. For comparison, we also show the results with a traditional saturating [b=0 in Eq. (1)]. The insert is the ratio of the high spatial frequency signal with different excitation laser powers.

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Fig. 2. (a) Sequences of the laser’s modulation and fluorescence detection. (b) The images of a single NV center. The confocal microscopy images of Ilow and Ihigh are recorded to calculate the final image Ir. Cross-section profiles corresponding to the dashed lines in the images of single NV center are shown on the upsides. (c) The spatial resolution of ASAX microscopy with different γ. The error bars are the deviation of the results. The insets are images of a single NV center with γ=0, 0.6, and 1.0. The scale bars are 500 nm in length. (d) The lateral cross-section profiles of ASAX images with γ=0, 0.6, and 1.0. (e) The spatial frequency distribution of ASAX images with different γ. (f) The SNR of the Ir as a function of γ.

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Fig. 3. (a), (d) Multiple NV centers imaged with the confocal microscopies. (b), (e) Multiple NV centers imaged with ASAX microscopies. The scale bars are 1 μm in length. (c) and (f) are the cross-section profiles indicated by the arrows.

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Bo Du, Xiang-Dong Chen, Ze-Hao Wang, Shao-Chun Zhang, En-Hui Wang, Guang-Can Guo, Fang-Wen Sun. High resolution imaging with anomalous saturated excitation[J]. Photonics Research, 2021, 9(1): 01000021.

High resolution imaging with anomalous saturated excitation Download： 692次

Fig. 3. (a), (d) Multiple NV centers imaged with the confocal microscopies. (b), (e) Multiple NV centers imaged with ASAX microscopies. The scale bars are 1 μm in length. (c) and (f) are the cross-section profiles indicated by the arrows.

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High resolution imaging with anomalous saturated excitation Download： 692次

Fig. 3. (a), (d) Multiple NV centers imaged with the confocal microscopies. (b), (e) Multiple NV centers imaged with ASAX microscopies. The scale bars are 1 μm in length. (c) and (f) are the cross-section profiles indicated by the arrows.

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