Polar vs. nonpolar InGaN/GaN quantum heterostructures: Opposite quantum confined electroabsorption and carrier dynamics behavior
Demir, H. V.
2010 Photonics Global Conference, PGC 2010
Please cite this item using this persistent URLhttp://hdl.handle.net/11693/28451
We present a study of quantum confined electroabsorption and carrier dynamics in polar c-plane and nonpolar a-plane InGaN/GaN quantum heterostructures. We demonstrate red-shifting absorption edge, due to quantum confined Stark effect, in nonpolar InGaN/GaN quantum structures in response to increased electric field, while we show the opposite effect with blue-shifting absorption spectra in polar quantum structures. Moreover, confirmed by time-resolved photoluminescence measurements, we prove that carrier lifetimes increase with increasing electric field for nonpolar structures, whereas the opposite occurs for polar ones.
- Conference Paper 
Showing items related by title, author, creator and subject.
Nonradiative resonance energy transfer directed from colloidal CdSe/ZnS quantum dots to epitaxial ingan/gan quantum wells for solar cells Nizamoglu, S.; Sari, E.; Baek J.-H.; Lee I.-H.; Demir, H. V. (2010)We report on Förster-type nonradiative resonance energy transfer (NRET) directed from colloidal quantum dots (QDs) to epitaxial quantum wells (QWs) with an efficiency of 69.6% at a rate of 1.527 ns-1 for potential application ...
Özgün E.; Ozbay E.; Caglayan H. (American Chemical Society, 2016)Preparation and measurement of an entangled state are essential in quantum information applications. The recent theoretical works on preparing and measuring entangled states via coupled quantum dot-waveguide platforms are ...
Highly Efficient Nonradiative Energy Transfer from Colloidal Semiconductor Quantum Dots to Wells for Sensitive Noncontact Temperature Probing Olutas M.; Guzelturk B.; Kelestemur Y.; Gungor K.; Demir H.V. (Wiley-VCH Verlag, 2016)This study develops and shows highly efficient exciton-transferring hybrid semiconductor nanocrystal films of mixed dimensionality comprising quasi 0D and 2D colloids. Through a systematic study of time-resolved and ...