TITLE

Homogeneous linewidth of the intraband transition at 1.55 μm in GaN/AlN quantum dots

AUTHOR(S)
Nguyen, D. T.; Wüster, W.; Roussignol, Ph.; Voisin, C.; Cassabois, G.; Tchernycheva, M.; Julien, F. H.; Guillot, F.; Monroy, E.
PUB. DATE
August 2010
SOURCE
Applied Physics Letters;8/9/2010, Vol. 97 Issue 6, p061903
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We present homogeneous line width measurements of the intraband transition at 1.55 μm in GaN/AlN quantum dots by means of nonlinear spectral hole-burning experiments. The square-root dependence of the differential transmission signal with the incident pump power reveals the importance of electron-electron scattering in the population relaxation dynamics. We find on the contrary that this scattering process plays a minor role in the coherence relaxation dynamics since the homogeneous linewidth of 15 meV at 5 K does not depend on the incident pump power. This suggests the predominance of other dephasing mechanisms such as spectral diffusion, and temperature-dependent measurements support this hypothesis.
ACCESSION #
52929609

 

Related Articles

  • Ultrafast spectral hole burning spectroscopy of exciton spin flip processes in InAs/GaAs quantum dots. Müller, T.; Strasser, G.; Unterrainer, K. // Applied Physics Letters;5/8/2006, Vol. 88 Issue 19, p192105 

    The exciton spin relaxation within the radiative doublet of the exciton ground state in InAs/GaAs self-assembled quantum dots is studied via an ultrafast spectral hole burning technique. In the case of cross-polarized pump and probe pulses a spectral “antihole” emerges due to...

  • Thermally dependent characteristics and spectral hole burning of the double-lasing, edge-emitting quantum-dot laser. Kim, Y. J.; Joshi, Y. K.; Fedorov, A. G. // Journal of Applied Physics;Apr2010, Vol. 107 Issue 7, p073104 

    Thermally induced behavior of double-lasing edge-emitting quantum dot (QD) laser is investigated by coupling the electron/hole rate equation model with thermal analysis. The increase in substrate temperature due to laser self-heating causes the gradual and continual degradation of ground-state...

  • Spatial hole burning and multimode generation threshold in quantum-dot lasers. Asryan, L.V.; Suris, R.A. // Applied Physics Letters;3/1/1999, Vol. 74 Issue 9, p1215 

    Examines spatial hole burning and multimode generation threshold in quantum-dot (QD) lasers as a function of the parameters of structure and temperature. Increase of the threshold current density with a decrease in the QD size dispersion; Existence of a maximum tolerable QD size dispersion and...

  • Gain dynamics and ultrafast spectral hole burning in In(Ga)As self-organized quantum dots. Kim, K.; Urayama, J.; Norris, T. B.; Singh, J.; Phillips, J.; Bhattacharya, P. // Applied Physics Letters;7/22/2002, Vol. 81 Issue 4, p670 

    Using a femtosecond three-pulse pump-probe technique, we investigated spectral hole-burning and gain recovery dynamics in self-organized In(Ga)As quantum dots. The spectral hole dynamics are qualitatively different from those observed in quantum wells, and allow us to distinguish unambiguously...

  • Electroluminescence and structural characteristics of InAs/In0.1Ga0.9As quantum dots grown on graded Si1-xGex/Si substrate. Tanoto, H.; Yoon, S. F.; Lew, K. L.; Loke, W. K.; Dohrman, C.; Fitzgerald, E. A.; Tang, L. J. // Applied Physics Letters;10/5/2009, Vol. 95 Issue 14, p141905 

    We studied the electroluminescence and structural characteristics of five-layer stacked self-assembled InAs/In0.1Ga0.9As quantum dot (QD) structures grown on graded Si1-xGex/Si substrate. The QD was found to take on a lens shaped structure with aspect ratio of 0.23±0.05. Room-temperature...

  • Nanophotonic technologies for innovative all- optical signal processor using photonic crystals and quantum dots. Sugimoto, Y.; Ikeda, N.; Ozaki, N.; Watanabe, Y.; Ohkouchi, S.; Nakamura, S.; Asakawa, K. // AIP Conference Proceedings;6/29/2009, Vol. 1147 Issue 1, p179 

    GaAs-based two-dimensional photonic crystal (2DPC) slab waveguides (WGs) and InAs quantum dots (QDs) were developed for key photonic device structures in the future. An ultrasmall and ultrafast symmetrical Mach-Zehnder (SMZ)-type all-optical switch (PC-SMZ) and an optical flip-flop device...

  • Room temperature spectral hole burning and elimination of photodarkening in sol-gel derived CdS.... Kang, K.; Kepner, A.D. // Applied Physics Letters;3/21/1994, Vol. 64 Issue 12, p1487 

    Investigates the room temperature spectral hole burning as a technique to characterize the cadmium sulphide quantum dots samples. Mechanism of photodarkening in quantum dots; Effect of photodarkening on optical nonlinearities; Reduction of the high silica content photodarkening; Measurement...

  • Lateral-cavity spectral hole burning in quantum-dot lasers. Ouyang, D.; Heitz, R.; Ledentsov, N. N.; Bogna´r, S.; Sellin, R. L.; Ribbat, Ch.; Bimberg, D. // Applied Physics Letters;8/26/2002, Vol. 81 Issue 9, p1546 

    Spectral hole burning effects are observed as strong spectral intensity modulations in the emission spectra of broad and narrow stripe quantum-dot lasers with ridge waveguide. The modulation is attributed to lateral-cavity resonances burning holes in the inhomogeneously broadened spectral gain...

  • Characterization and Modeling of Single-particle Energy Levels and Resonant Currents in a Coherent Quantum Dot Mixer. Austing, D. G.; Payette, C.; Yu, G.; Gupta, J. A.; Aers, G. C.; Nair, S. V.; Partoens, B.; Amaha, S.; Tarucha, S. // AIP Conference Proceedings;12/22/2011, Vol. 1399 Issue 1, p951 

    We characterize and model the single-particle energy level position and resonant current strength at a three-level crossing in a coherent mixer composed of two weakly coupled vertical quantum dots. In addition to clear anticrossing behavior, an otherwise strong resonance is completely...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics