Investigation of large Stark shifts in InGaN/GaN multiple quantum wells

Guibao Xu, Guan Sun, Yujie J. Ding*, Hongping Zhao, Guangyu Liu, Jing Zhang, Nelson Tansu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

20 Scopus citations


Photoluminescence (PL) spectra of InGaN/GaN multiple quantum wells excited by ultrafast laser pulses are investigated over broad ranges of excitation levels and temperatures. The PL peak energy undergoes blue, red, zero, and blue shifts with increasing the excitation fluence density. Such a peculiar behavior can be explained based on competing processes of screening of the built-in electric field by the photogenerated carriers, band-gap renormalization, and band-filling effect. We have also measured and analyzed the dependence of the PL energy and linewidth on the temperature. Due to the interplay between the band-gap renormalization and band-filling effect, the PL energy shifts to the highest value, whereas the PL linewidth reaches the minimum value at ≈60 K.

Original languageEnglish (US)
Article number033104
JournalJournal of Applied Physics
Issue number3
StatePublished - Jan 21 2013
Externally publishedYes

Bibliographical note

Funding Information:
This work has been supported by U.S. DARPA and US National Science Foundation (DMR-0907260 and ECCS-1028490).

ASJC Scopus subject areas

  • General Physics and Astronomy


Dive into the research topics of 'Investigation of large Stark shifts in InGaN/GaN multiple quantum wells'. Together they form a unique fingerprint.

Cite this