Abstract
We studied the tunable three-photon absorption (3PA) response of colloidal CdSe nanocrystals in near-infrared by surface states which were successfully controlled with a purification process. The 3PA cross section at room temperature was decreased by more than two orders of magnitude when the density of surface traps increases and works through the photoinduced and intrinsic dipole moments of excitons, indicating that the surface-tuned three-photon absorption of CdSe was of significance in potential applications.
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The authors acknowledge funding supports from the National Natural Science Foundation of China (Grant Nos. 61404045, U1404624) and the Natural Science Foundation of Henan Province, China (Grant No. 144300510018).
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Wang, C., Wang, F., Zhu, B. et al. Surface-tuned three-photon absorption of CdSe nanocrystals in near-infrared. Appl. Phys. B 123, 195 (2017). https://doi.org/10.1007/s00340-017-6768-x
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DOI: https://doi.org/10.1007/s00340-017-6768-x