Internal field effects on the lasing characteristics of InGaN/GaN quantum well lasers
AuthorDialynas, G. E.
Pelekanos, N. T.
SourceJournal of Applied Physics
Google Scholar check
MetadataShow full item record
A theoretical investigation of Inx Ga1-x N/GaN single quantum well lasers with x in the range 0.05≤x≤0.3 is carried out via self-consistent Schrödinger-Poisson calculations in the effective mass approximation in order to quantify the adverse effects of the internal electric field on the lasing characteristics of these heterostructures. We find a nonzero optimum internal field value that minimizes the threshold current density Jth, and whose amplitude depends on the quantum well width, In content, and cavity losses. We demonstrate that the complete elimination of the internal field in In0.2 Ga0.8 N/GaN blue laser diodes with typical cavity losses should result in a decrease in Jth by as much as a factor of 4. Furthermore, for a wide range of In contents and cavity losses, we find that the optimum well width that minimizes Jth ranges between 2.5 and 4 nm. Finally, we show that the longest lasing wavelength that can be achieved from an InGaN/GaN quantum well laser is in the range of 480-500 nm depending on cavity losses. © 2008 American Institute of Physics.
Showing items related by title, author, creator and subject.
Residual Doping Effects on the Amplitude of Polarization-Induced Electric fields in GaN/AlGaN Quantum Wells Simon, J.; Langer, R.; Barski, A.; Zervos, Matthew; Pelekanos, N. T. (2001)We show that residual doping and carrier distribution effects decrease the observed polarization-induced electric fields in GaN/AlGaN quantum wells and that these effects ought to be considered if we want to compare in a ...
Dialynas, G. E.; Deligeorgis, G.; Zervos, Matthew; Pelekanos, N. T. (2006)A theoretical investigation of the effect of polarization-induced fields on the optoelectronic properties of a 3 nm In0.2Ga0.8N/GaN single quantum well has been carried out via a self-consistent solution of Schrödinger-Poisson ...
Doctoral ThesisOpen Access
Topological and conventional quantum matter in strong magnetic and electric fields : ground state thermodynamic and transport considerations Konstantinou, Georgios N. (Πανεπιστήμιο Κύπρου, Σχολή Θετικών και Εφαρμοσμένων Επιστημών / University of Cyprus, Faculty of Pure and Applied Sciences, 2016-05)Η παρούσα διατριβή επικεντρώνεται στη μελέτη της θερμοδυναμικής ηλεκτρονικών συστημάτων (τοπολογικών ή συμβατικών) στην θεμελιώδη τους κατάσταση, όταν μερικές εξωτερικές παράμετροι μεταβάλλονται (π.χ. το πάχος μιας ...