An optically detected magnetic resonance spectrometer with tunable laser excitation and wavelength resolved infrared detection

TL;DR

This paper introduces a novel ODMR spectrometer with tunable laser excitation and wavelength-resolved infrared detection, enabling advanced studies on materials like carbon nanotubes and quantum dots.

Contribution

The development of an ODMR spectrometer with tunable laser excitation, spectrograph analysis, and near-infrared detection, expanding capabilities for material characterization.

Findings

Demonstrated utility on single-walled carbon nanotubes

Compared performance with similar instruments, showing improvements

Enabled studies on near-infrared emitting materials

Abstract

We present the development and performance of an optically detected magnetic resonance (ODMR) spectrometer. The spectrometer represents advances over similar instruments in three areas: i) the exciting light is a tunable laser source which covers much of the visible light range, ii) the optical signal is analyzed with a spectrograph, iii) the emitted light is detected in the near-infrared domain. The need to perform ODMR experiments on single-walled carbon nanotubes motivated the present development and we demonstrate the utility of the spectrometer on this material. The performance of the spectrometer is critically compared to similar instruments. The present development opens the way to perform ODMR studies on various new materials such as molecules and luminescent quantum dots where the emission is in the near-infrared range and requires a well-defined excitation wavelength and analysis of the scattered light.