Rui Geng, Kang Zhao, Qingshan Chen. Long-distance recognition of infrared quantum dot materials[J]. Infrared and Laser Engineering, 2021, 50(7): 20200436
- Infrared and Laser Engineering
- Vol. 50, Issue 7, 20200436 (2021)
Fig. 1. Absorption (a) and emission (b) spectra of PbS quantum dots in different sizes
Fig. 1. [in Chinese]
Fig. 2. Composition of the fluorescence detection system for infrared quantum dot
Fig. 3. PL spectrum of the infrared quantum dot material sample
Fig. 4. Signal processing flow chart of the fluorescence detection system
Fig. 5. Laser echo signal waveforms for infrared quantum dot samples at different modulation frequencies
Fig. 6. Output waveforms of the amplification circuits without (a) and with (b) untested quantum dot samples
Fig. 7. Variation of output DC voltage of the detection system for quantum dot fluorescence
Fig. 8. Fluorescence detection signal waveforms of sample B （before and after phase sensitive detection）
Fig. 9. The maximum detectable distance of fluorescence for quantum dot sample varies with the power density of excitation light
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