Gate-controlled generation of optical pulse trains using individual carbon nanotubes
arXiv:1407.7086 · doi:10.1038/ncomms7335
Abstract
We report on optical pulse-train generation from individual air-suspended carbon nanotubes under an application of square-wave gate voltages. Electrostatically-induced carrier accummulation quenches photoluminescence, while a voltage sign reversal purges those carriers, resetting the nanotubes to become luminescent temporarily. Frequency domain measurements reveal photoluminescence recovery with characteristic frequencies that increase with excitation laser power, showing that photoexcited carriers quench the emission in a self-limiting manner. Time-resolved measurements directly confirm the presence of an optical pulse train sychronized to the gate voltage signal, and flexible control over pulse timing and duration is demonstrated.
4 pages, 4 figures
References in corpus (7)
- Exciton binding energies in carbon nanotubes from two-photon photoluminescence
- Electrically driven thermal light emission from individual single-walled carbon nanotubes
- Phonon and Electronic Non-radiative Decay of Excitons in Carbon Nanotubes
- Exciton diffusion in air-suspended single-walled carbon nanotubes
- Nonlinear Photoluminescence Excitation Spectroscopy of Carbon Nanotubes: Exploring the Upper Density Limit of One-Dimensional Excitons
- Enhancement of carbon nanotube photoluminescence by photonic crystal nanocavities
- Optical control of individual carbon nanotube light emitters by spectral double resonance in silicon microdisk resonators