Abstract
Defect-decorated single-wall carbon nanotubes have shown rapid growing potential for imaging, sensing, and the development of room-temperature single-photon sources. The key to the highly nonclassical emission statistics is the discrete energy spectrum of defect-localized excitons. However, variations in defect configurations give rise to distinct spectral bands that may compromise single-photon efficiency and purity in practical devices, and experimentally it has been challenging to study the exciton population distribution among the various defect-specific states. Here, we performed photon correlation spectroscopy on hexyl-decorated single-wall carbon nanotubes to unravel the dynamics and competition between neutral and charged exciton populations. With autocorrelation measurements at the single-tube level, we prove the nonclassical photon emission statistics of defect-specific exciton and trion photoluminescence and identify their mutual exclusiveness in photoemissive events with cross-correlation spectroscopy. Moreover, our study reveals the presence of a dark state with population-shelving time scales between 10 and 100 ns. These new insights will guide further development of chemically tailored carbon nanotube states for quantum photonics applications.
| Item Type: | Journal article |
|---|---|
| Faculties: | Physics |
| Research Centers: | Center for NanoScience (CENS) |
| Subjects: | 500 Science > 530 Physics 500 Science > 500 Science |
| ISSN: | 1530-6984 |
| Language: | English |
| Item ID: | 82471 |
| Date Deposited: | 15. Dec 2021 15:01 |
| Last Modified: | 15. Dec 2021 15:01 |
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