Dynamic filamentation and beam quality of quantum-dot lasers

Gehrig, E.; Hess, O.; Ribbat, C.; Sellin, R. L.; Bimberg, D.
March 2004
Applied Physics Letters;3/8/2004, Vol. 84 Issue 10, p1650
Academic Journal
We present a comparative study of numerical simulations and experiments on the spatiotemporal dynamics and emission characteristics of quantum-well and quantum-dot lasers of identical structure. They show that, in the quantum-dot laser, the strong localization of carrier inversion and the small amplitude–phase coupling enable a significant improvement of beam quality compared to quantum-well lasers of identical geometry. Near-field profiles and beam quality (M[sup 2]) parameters calculated on the basis of time-dependent effective Maxwell–Bloch equations into which the physical properties of the active media are included via space-dependent material parameters, effective time constants, and matrix elements are fully confirmed by experimental measurements. Together they indicate that, in the quantum-dot laser, the strong localization of carrier inversion and the small amplitude–phase coupling enable a significant improvement of beam quality compared with quantum-well lasers of identical geometry. © 2004 American Institute of Physics.


Related Articles

  • Room temperature operation of InGaAs/InGaAsP/InP quantum dot lasers. Jang, J. W.; Pyun, S. H.; Lee, S. H.; Lee, I. C.; Jeong, Weon G.; Stevenson, R.; Dapkus, P. Daniel; Kim, N. J.; Hwang, M. S.; Lee, D. // Applied Physics Letters;10/25/2004, Vol. 85 Issue 17, p3675 

    The growth conditions for InGaAs/InGaAsP/InP quantum dots (QDs) have been optimized and QDs of high luminescence efficiency and the room temperature operation of QD lasers emitting at ∼1.5 μm have been demonstrated. Lattice-matched InGaAsP (λg=1.0–1.1 μm) was used as a...

  • Bias and temperature dependence of the escape processes in quantum dots-in-a-well infrared photodetectors. Höglund, L.; Holtz, P. O.; Pettersson, H.; Asplund, C.; Wang, Q.; Almqvist, S.; Smuk, S.; Petrini, E.; Andersson, J. Y. // Applied Physics Letters;9/8/2008, Vol. 93 Issue 10, p103501 

    The performance of quantum dots-in-a-well infrared photodetectors (DWELL IPs) has been studied by means of interband and intersubband photocurrent measurements as well as dark current measurements. Using interband photocurrent measurements, substantial escape of electrons from lower lying states...

  • QD and QW lasers face off.  // Laser Focus World;Apr2004, Vol. 40 Issue 4, p7 

    Compares quantum well and quantum dot lasers of identical design. Material differential gain; Material differential carrier-induced refractive index.

  • Ultrafast absorption recovery dynamics of 1300 nm quantum dot saturable absorber mirrors. Lumb, M. P.; Clarke, E.; Harbord, E.; Spencer, P.; Murray, R.; Masia, F.; Borri, P.; Langbein, W.; Leburn, C. G.; Jappy, C.; Metzger, N. K.; Brown, C. T. A.; Sibbett, W. // Applied Physics Letters;7/27/2009, Vol. 95 Issue 4, p041101 

    We compare the performance of two quantum dot saturable absorber mirrors with one device operating at the quantum dot ground state transition whereas the other operates at the first excited state transition. Time-resolved photoluminescence and heterodyne four-wave mixing experiments demonstrate...

  • Highly efficient, spatially coherent distributed feedback lasers from dense colloidal quantum dot films. Dang, C.; Lee, J.; Roh, K.; Kim, H.; Ahn, S.; Jeon, H.; Breen, C.; Steckel, J. S.; Coe-Sullivan, S.; Nurmikko, A. // Applied Physics Letters;10/21/2013, Vol. 103 Issue 17, p171104 

    Colloidal quantum dots (CQD) are now making their entry to full-color displays, endowed by their brightness and single-material base. By contrast, many obstacles have been encountered in their use towards lasers. We demonstrate here optically pumped distributed feedback (DFB) lasers, based on...

  • ZnCdMgSe-Based Semiconductors for Intersubband Devices. Tamargo, Maria C. // AIP Conference Proceedings;11/12/2008, Vol. 1077 Issue 1, p195 

    This paper presents a review of recent results on the application of ZnCdMgSe-based wide bandgap II-VI compounds to intersubband devices such as quantum cascade lasers and quantum well infrared photodetectors operating in the mid-infrared region. The conduction band offset of ZnCdSe/ZnCdMgSe...

  • Theoretical investigation of carrier capture and escape processes in cylindrical quantum dots. Miloszewski, Jacek M.; Wartak, Marek S.; Wallace, Steven G.; Fafard, Simon // Journal of Applied Physics;Oct2013, Vol. 114 Issue 15, p154311 

    In order to optimize the design of various optoelectronic devices utilizing quantum dots (QD), we must better understand the properties of carrier capture and escape times in these systems. Some of the properties of cylindrical quantum dots were studied. The wavefunctions and eigenenergies of a...

  • Asymmetric heterostructure for photovoltaic InAs quantum dot infrared photodetector. Nevou, L.; Liverini, V.; Castellano, F.; Bismuto, A.; Faist, J. // Applied Physics Letters;7/12/2010, Vol. 97 Issue 2, p023505 

    A photovoltaic InAs quantum dot-under-a-well photodetector is reported with a peak responsivity at 7 μm wavelength. In this structure, we implement an improved injection scheme, which allows a controlled feeding of the quantum dots through a modulation-doped InGaAs quantum well injector. A...

  • Quantum dot structures grown on Al containing quaternary material for infrared photodetection beyond 10 μm. Souza, P. L.; Lopes, A. J.; Gebhard, T.; Unterrainer, K.; Pires, M. P.; Villas-Boas, J. M.; Vieira, G. S.; Guimarães, P. S. S.; Studart, Nelson // Applied Physics Letters;4/23/2007, Vol. 90 Issue 17, p173510 

    Different InAs quantum dot structures grown on InGaAlAs lattice matched to InP were investigated for quantum dot infrared photodetectors. Extremely narrow photocurrent peaks were observed, demonstrating great potential for fine wavelength selection. Structures which can detect radiation beyond...


Read the Article


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

Try another library?
Sign out of this library

Other Topics