Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Search research articles

Related Experiment Video

Updated: Nov 16, 2025

Resonance Fluorescence of an InGaAs Quantum Dot in a Planar Cavity Using Orthogonal Excitation and Detection

Resonance Fluorescence of an InGaAs Quantum Dot in a Planar Cavity Using Orthogonal Excitation and Detection

Published on: October 13, 2017

Tuning radiative lifetimes in semiconductor quantum dots.

Biswajit Bhattacharyya¹, Arpita Mukherjee¹, Rekha Mahadevu¹

¹Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore 560012, India.

The Journal of Chemical Physics

|February 20, 2021

Summary

This summary is machine-generated.

Related Concept Videos

Biasing of Metal-Semiconductor Junctions

Biasing of Metal-Semiconductor Junctions

Biasing metal-semiconductor junctions involves applying a voltage across the junction. Specifically, the metal is connected to a voltage source, while the semiconductor is grounded. This technique is essential for controlling the direction and magnitude of current flow in electronic devices, including diodes, transistors, and photovoltaic cells.
In Schottky junctions, where the semiconductor is n-type, applying a positive voltage to the metal relative to the semiconductor reduces its Fermi...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Thermodynamic Model for Quantum Dot Assemblies Formed Because of Charge Transfer.

ACS omega·2019

Same author

Low Threshold Quantum Dot Lasers.

The journal of physical chemistry letters·2016

Same author

Controlling light absorption in charge-separating core/shell semiconductor nanocrystals.

ACS nano·2013

See all related articles

Researchers tuned the light emission lifetimes of quantum dots by adjusting their composition. This method offers unprecedented control over spontaneous emission, crucial for advancing photonic devices.

Area of Science:

Materials Science
Quantum Optics
Nanotechnology

Background:

Tunable spontaneous emission lifetimes are critical for developing advanced photonic devices.
Controlling these lifetimes enables precise manipulation of light emission properties.

Purpose of the Study:

To demonstrate a method for continuously tuning the radiative emission lifetimes of chromophores.
To investigate the composition-dependent electronic structure of copper-doped Cadmium Zinc Selenide (CdZnSe) quantum dots for lifetime control.

Main Methods:

Varying the density of electronic states involved in the emission process.
Analyzing the composition-dependent electronic structure of copper-doped CdZnSe quantum dots.
Estimating spontaneous emission lifetimes via ratios of emission lifetimes to absolute quantum yields.

More Related Videos

Nanofabrication of Gate-defined GaAs/AlGaAs Lateral Quantum Dots

Nanofabrication of Gate-defined GaAs/AlGaAs Lateral Quantum Dots

Published on: November 1, 2013

High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy

High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy

Published on: June 28, 2016

Related Experiment Videos

Last Updated: Nov 16, 2025

Resonance Fluorescence of an InGaAs Quantum Dot in a Planar Cavity Using Orthogonal Excitation and Detection

Resonance Fluorescence of an InGaAs Quantum Dot in a Planar Cavity Using Orthogonal Excitation and Detection

Published on: October 13, 2017

Nanofabrication of Gate-defined GaAs/AlGaAs Lateral Quantum Dots

Nanofabrication of Gate-defined GaAs/AlGaAs Lateral Quantum Dots

Published on: November 1, 2013

High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy

High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy

Published on: June 28, 2016

Directly measuring lifetimes using ultrafast luminescence upconversion experiments.

Main Results:

The nature and density of electronic states are functions of copper inclusion levels in CdZnSe quantum dots.
This provides a direct method for controlling spontaneous emission lifetimes.
Spontaneous emission lifetimes were tuned over three orders of magnitude, from approximately 15 nanoseconds to over 7 microseconds.
Excellent agreement was found between estimated and directly measured lifetimes.

Conclusions:

The developed method allows for unprecedented control over spontaneous emission lifetimes in chromophores.
This tunability is achieved by manipulating the electronic structure through material composition.
The findings have significant implications for the design and application of novel photonic devices.