Time-resolved dynamics in single InGaN quantum dots

Robert A. Taylor; James W. Robinson; James H. Rice; Kwan H. Lee; Anas Jarjour; Jong H. Na; Shazia Yasin; Rachel A. Oliver; Menno J. Kappers; Colin J. Humphreys; G. Andrew D. Briggs; David P. Williams; Eoin P. O'Reilly; Aleksey D. Andreev; Yasuhiko Arakawa

doi:10.1117/12.583431

13 April 2005 Time-resolved dynamics in single InGaN quantum dots (Invited Paper)

Robert A. Taylor, James W. Robinson, James H. Rice, Kwan H. Lee, Anas Jarjour, Jong H. Na, Shazia Yasin, Rachel A. Oliver, Menno J. Kappers, Colin J. Humphreys, G. Andrew D. Briggs, David P. Williams, Eoin P. O'Reilly, Aleksey D. Andreev, Yasuhiko Arakawa

Author Affiliations +

Proceedings Volume 5725, Ultrafast Phenomena in Semiconductors and Nanostructure Materials IX; (2005) https://doi.org/10.1117/12.583431
Event: Integrated Optoelectronic Devices 2005, 2005, San Jose, California, United States

Abstract

We present measurements of microphotoluminescence decay dynamics for single InGaN quantum dots. The recombination is shown to be characterized by a single exponential decay, in contrast to the non-exponential recombination dynamics seen in the two-dimensional wetting layer. The lifetimes of single dots in the temperature range 4 K to 60 K decrease with increasing temperature. Microphotoluminescence measurements of exciton complexes in single MOVPE-grown InGaN quantum dots are also reported. We find the exciton-biexciton and exciton-charged exciton splitting energies to be 25 meV and 10 meV to the higher-energy side of the exciton ground state, respectively. Assignments of the ground state exciton, biexciton and charged exciton are supported by theoretical calculations. These measurements have been extended to investigate the time-resolved dynamics of biexciton transitions in the quantum dots. The measurements yield a radiative recombination lifetime of 1.0 ns for the exciton and 1.4 ns for the biexciton. The data can be fitted to a coupled differential equation rate equation model, confirming that the exciton state is refilled as biexcitons undergo radiative decay.

Citation Download Citation

Robert A. Taylor, James W. Robinson, James H. Rice, Kwan H. Lee, Anas Jarjour, Jong H. Na, Shazia Yasin, Rachel A. Oliver, Menno J. Kappers, Colin J. Humphreys, G. Andrew D. Briggs, David P. Williams, Eoin P. O'Reilly, Aleksey D. Andreev, and Yasuhiko Arakawa "Time-resolved dynamics in single InGaN quantum dots (Invited Paper)", Proc. SPIE 5725, Ultrafast Phenomena in Semiconductors and Nanostructure Materials IX, (13 April 2005); https://doi.org/10.1117/12.583431

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available