Related Experiment Video
Updated: Sep 13, 2025

Experimental Methods for Trapping Ions Using Microfabricated Surface Ion Traps
Published on: August 17, 2017
Excited-State Trions in a Quantum Well
Sourabh Jain1, Mikhail Glazov2, Ashish Arora1
1Indian Institute of Science Education and Research, Department of Physics, Dr. Homi Bhabha Road, 411008 Pune, India.
None:
We report on the observation of an excited 2s state of a trion in a 4.2 nm wide doped GaAs/Al_{0.3}Ga_{0.7}As quantum well using magneto-optical Kerr effect (MOKE) spectroscopy under out-of-plane magnetic fields up to 6 T. This resonance appears slightly below the 2s exciton in energy. Strikingly, the 2s trion is found to be bound only for magnetic fields larger than 1 T. The signature of the 2s trion is absent in the magnetoreflectance spectra, while it is detectable in the MOKE spectra signifying the importance of the powerful technique. Similar to the 1s states, the 2s trion shows an opposite degree of magnetic-field-induced polarization compared to its exciton counterpart, in agreement with our theoretical calculations. This transfer of oscillator strength between the complexes establishes an optical fingerprint of the 2s excited trion.
More Related Videos
12:57Resonance Fluorescence of an InGaAs Quantum Dot in a Planar Cavity Using Orthogonal Excitation and Detection
Published on: October 13, 2017
11:33All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics
Published on: January 19, 2018
Related Concept Videos
Atomic Nuclei: Nuclear Spin State Overview
Atomic Nuclei: Nuclear Relaxation Processes
Deactivation Processes: Jablonski Diagram
Atomic Nuclei: Nuclear Spin State Population Distribution
The Bohr Model
Molecular Spectroscopy: Absorption and Emission