Laser heating control with polarized light in isolated multi-walled carbon nanotubes

TL;DR

This paper introduces a method to control laser heating of isolated multi-walled carbon nanotubes by adjusting light polarization, enabling precise heating without changing power density, with potential applications in nanoelectronics and material processing.

Contribution

It presents a novel polarization-based laser heating control technique leveraging the antenna effect in multi-walled carbon nanotubes, demonstrated through Raman spectroscopy.

Findings

Heating varies with polarization angle as shown by Raman shifts.

Method allows selective heating of nanotubes without changing laser power.

Potential applications in nano-device fabrication and targeted nanotube destruction.

Abstract

We are proposing a novel method of laser heating control only through change in polarization of the incident light, keeping its power density constant. The idea combines antenna effect found in isolated multi-walled carbon nanotubes and the possibility of their heating by light illumination. To observe this we used Raman spectroscopy technique, where the heating manifests itself in a pronounced downshift of the Raman G and 2D lines as a function of the polarization angle. Our method can be useful in field electron emission devices or in selective nanotubes heating and destruction. It can also be extended to other one dimensional nanoobjects, if only certain conditions are fulfilled.