Surface-tuned three-photon absorption of CdSe nanocrystals in near-infrared
| Autor: | Jiayu Zhang, Baohua Zhu, Shuxi Dai, Fangfang Wang, Yuzong Gu, Chong Wang |
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| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Materials science Physics and Astronomy (miscellaneous) Condensed Matter::Other Exciton Near-infrared spectroscopy General Engineering Physics::Optics General Physics and Astronomy Nanotechnology 02 engineering and technology Condensed Matter::Mesoscopic Systems and Quantum Hall Effect 021001 nanoscience & nanotechnology 01 natural sciences Molecular physics Condensed Matter::Materials Science Dipole Cross section (physics) Colloid 0103 physical sciences 0210 nano-technology Absorption (electromagnetic radiation) Order of magnitude Surface states |
| Zdroj: | Applied Physics B. 123 |
| ISSN: | 1432-0649 0946-2171 |
| DOI: | 10.1007/s00340-017-6768-x |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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