Simulation and design of GaN/AlGaN far-infrared (λ∼34 μm) quantum-cascade laser

Jovanović, V. D.; Indjin, D.; Ikonić, Z.; Harrison, P.
April 2004
Applied Physics Letters;4/19/2004, Vol. 84 Issue 16, p2995
Academic Journal
Designs of GaN/AlGaN quantum-cascade lasers emitting at 34 and 38 μm (ΔE∼36 and 34 meV) are presented, assuming either a- or c-plane crystal growth orientation. In the calculation of the quasibound state energies and wave functions, we account for the intrinsic electric field induced by piezoelectric and (in case of c-plane growth) the spontaneous polarization. The quantum-cascade structures were simulated, and their output characteristics extracted, using a fully self-consistent rate equation model with all relevant intra- and interperiod scatterings included. Both electron–LO-phonon and electron–electron scattering mechanisms are taken into account. Maximal population inversions between active laser states of up to 19% for the a-plane, and up to 40% for the c-plane design, are predicted and, based on estimated modal gain and waveguide/mirror losses in suitably designed structures, these indicate the feasibility of laser action in GaN/AlGaN cascades. © 2004 American Institute of Physics.


Related Articles

  • Experimental Studies on the Non-linear Ferroelectric and Ferroelastic Properties of Piezoceramics. Zhou, Dayu; Kamlah, Marc // AIP Conference Proceedings;7/29/2008, Vol. 1029 Issue 1, p199 

    We summarize some of the experimental work on the constitutive behaviour of Soft-PZT piezoceramics carried out at the Research Center Karlsruhe during the recent years. In particular, multi-axial, non-proportional polarization rotation tests are presented for a commercial soft PZT material under...

  • Large electric field induced strains in ferroelectric islands. Zhang, J. X.; Sheng, G.; Chen, L. Q. // Applied Physics Letters;3/29/2010, Vol. 96 Issue 13, p132901 

    An effective mechanism that generates large recoverable electric field induced strains in ferroelectric islands is studied by phase-field modeling. The large strains originate from the reversible 90° domain switching between a1 (a2) domains and c domains, driven by an applied electric field...

  • Breakdown-induced polarization buildup in porous fluoropolymer sandwiches: a thermally stable piezoelectret. Hu, Z.; von Seggern, H. // Journal of Applied Physics;1/15/2006, Vol. 99 Issue 2, p024102 

    The buildup of air-breakdown-induced polarization in a one-side-metallized three-layer sandwich structure consisting of fluorinated ethylene propylene copolymer (FEP) / expanded polytetrafluoroethylene (ePTFE) / FEP has been studied utilizing a corona triode for voltage application. The FEP...

  • Ferroelectric domain structures of 0.4-μm-thick Pb(Zr,Ti)O3 films prepared by polyvinylpyrrolidone-assisted Sol-Gel method. Yamano, Akihiro; Takata, Keiji; Kozuka, Hiromitsu // Journal of Applied Physics;Mar2012, Vol. 111 Issue 5, p054109 

    Strain imaging of piezoelectric material enables us to observe piezo/ferroelectric properties with high resolution. We observed single-step-deposited 0.4-μm-thick Pb(Zr0.53Ti0.47)O3 (PZT). The PZT film had the small granular grains in size with around 40 nm, while the rosettes were around...

  • Electric field dependence of piezoelectric properties of lanthanum-modified lead-zirconate-titanate solid solutions at the phase transition via intermediate state. Ishchuk, V. M.; Sobolev, V. L.; Spiridonov, N. A. // Journal of Applied Physics;6/15/2007, Vol. 101 Issue 12, p124103 

    We present an experimental investigation of the influence of external electric field on the stability of phases in antiferroelectric substances with a small difference in the free energies of the ferroelectric and antiferroelectric states. The composition-electric-field phase diagrams with...

  • Nonpolar gallium nitride laser diodes are the next new blue. Feezell, Daniel; Nakamura, Shuji; Denbaars, Steve; Speck, Jim // Laser Focus World;Oct2007, Vol. 43 Issue 10, p79 

    The article reports on the study on the characteristics of the blue-violet gallium nitride(GaN)-based laser diodes developed on nonpolar crystal planes. The initiative aims to measure the performance of the systems compared to the conventional GaN-based laser diodes. Information regarding the...

  • Enhanced magnetoelectric effect in self-stressed multi-push-pull mode Metglas/Pb(Zr,Ti)O3/Metglas laminates. Li, Menghui; Wang, Yaojin; Gao, Junqi; Li, Jiefang; Viehland, D. // Applied Physics Letters;7/9/2012, Vol. 101 Issue 2, p022908 

    Two methods to effectively induce self-stress on Metglas/Pb(Zr,Ti)O3/Metglas laminate are presented: (i) applying a dc magnetic field to the Metglas layers or (ii) applying a dc electric field to the core piezoelectric composites. An optimum self-stress enhances the magnetoelectric (ME) effect...

  • Large converse magnetoelectric effect in Metglas FeCoBSi and 0.7Pb(Mg1/3Nb2/3)O3-0.3PbTiO3 laminated composite. Xuan, H. C.; Wang, L. Y.; Ma, S. C.; Zheng, Y. X.; Cao, Q. Q.; Wang, D. H.; Du, Y. W. // Applied Physics Letters;1/31/2011, Vol. 98 Issue 5, p052505 

    Converse magnetoelectric (CME) effect is investigated in a FeCoBSi/0.7Pb(Mg1/3Nb2/3)O3-0.3PbTiO3 laminated composite by using induction method within different frequencies. A large CME coefficient of 3.05 G/V is observed at the resonance frequency of 76.5 kHz under a low bias magnetic field of...

  • Response of piezoelectric lead metaniobate to high compressive stresses. Amin, A.; Lukasiewicz, S. J. // Applied Physics Letters;12/15/1985, Vol. 47 Issue 12, p1356 

    The induced polarization, P[sub 3](C/m²), in piezoelectric lead metaniobate was examined as a function of monotonically increasing uniaxial stress parallel to the poling direction. Comparison to the induced polarization as extrapolated from small oscillating force measurements illustrates, as...


Read the Article


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

Try another library?
Sign out of this library

Other Topics