Gate-induced blueshift and quenching of photoluminescence in suspended single-walled carbon nanotubes

TL;DR

This study investigates how applying a gate voltage affects the photoluminescence of suspended single-walled carbon nanotubes, revealing energy blueshifts and intensity quenching with potential implications for nanotube-based optoelectronic devices.

Contribution

It provides experimental evidence of gate-induced blueshifts and quenching in photoluminescence, highlighting extrinsic mechanisms across different nanotube chiralities.

Findings

Photoluminescence exhibits slight blueshifts under gate voltage.

Photoluminescence intensity quenches exponentially with gate voltage.

Blueshifts are similar across different chiralities, indicating extrinsic effects.

Abstract

Gate-voltage effects on photoluminescence spectra of suspended single-walled carbon nanotubes are investigated. Photoluminescence microscopy and excitation spectroscopy are used to identify individual nanotubes and to determine their chiralities. Under an application of gate voltage, we observe slight blueshifts in the emission energy and strong quenching of photoluminescence. The blueshifts are similar for different chiralities investigated, suggesting extrinsic mechanisms. In addition, we find that the photoluminescence intensity quenches exponentially with gate voltage.