Coherent coupling of ring cavity surface emitting quantum cascade lasers

Schwarzer, Clemens; Mujagic, Elvis; Yu Yao; Schrenk, Werner; Chen, Jianxin; Gmachl, Claire; Strasser, Gottfried
August 2010
Applied Physics Letters;8/16/2010, Vol. 97 Issue 7, p071103
Academic Journal
We present investigations on coherent coupling of surface emitting quantum cascade lasers (QCLs). For this purpose, the evanescent field coupling method is exploited under incorporation of a ring cavity surface emitting QCL pair with an emission wavelength of ≈8 μm. A series of these pairs with intercavity separations of 1 and 3 μm was fabricated. The coupling gap of 1 μm yields robust phase-locked light source pairs with coherent emission at all injection currents and a corresponding threshold current density of 2.65 kA/cm2 at room-temperature.


Related Articles

  • Analysis of the vertices DDV and D*DV with light-cone QCD sum rules. Zhi-Gang Wang // European Physical Journal C -- Particles & Fields;Nov2007, Vol. 52 Issue 3, p553 

    In this article, we study the vertices DDV and D*DV with the light-cone QCD sum rules. The strong coupling constants gDDV and fD*DV play an important role in understanding the final-state re-scattering effects in the hadronic B decays. They are related to the basic parameters β and λ...

  • Electrical control of polariton coupling in intersubband microcavities. Anappara, Aji A.; Tredicucci, Alessandro; Biasiol, Giorgio; Sorba, Lucia // Applied Physics Letters;8/1/2005, Vol. 87 Issue 5, p051105 

    We demonstrate the external control of the coupling between the intersubband transition and the photonic mode of a GaAs/AlGaAs microcavity with multiple quantum wells embedded. By electrical gating, the charge density in the wells can be lowered, thereby quenching the intersubband polaritons and...

  • A semiclassical generalized quantum master equation for an arbitrary system-bath coupling. Shi, Qiang; Geva, Eitan // Journal of Chemical Physics;6/8/2004, Vol. 120 Issue 22, p10647 

    The Nakajima­Zwanzig generalized quantum master equation (GQME) provides a general, and formally exact, prescription for simulating the reduced dynamics of a quantum system coupled to a, possibly anharmonic, quantum bath. In this equation, a memory kernel superoperator accounts for the...

  • DEVELOPMENT OF A CONNECTION-METHOD CALCULATION UTILITY FOR THE DORT-TORT CODE. Hirao, Yoshihiro; Matsumoto, Yoshihiro // Radiation Protection Dosimetry;2005, Vol. 116 Issue 1-4, p19 

    A code package has been developed to utilise connection-method calculation for both 2-D and 3-D SN codes, DORT-TORT, extending further the capabilities of DORSET/TORSET. It also includes support utilities to make input preparation easier. Potential uses of the method are, for example, to allow...

  • 13: The Question of a Universal Coupling Coefficient.  // Theory of Fundamental Processes;1998, p60 

    Chapter 13 of the book "The Theory of Fundamental Processes," by Richard P. Feynman is presented. It looks into a concept called universal coupling coefficient in the fields of theoretical physics and quantum mechanics. It also introduces a proposal on the equalness of coupling coefficients of...

  • 14: Rules of Strangeness changing Decays Experiments.  // Theory of Fundamental Processes;1998, p64 

    Chapter 14 of the book "The Theory of Fundamental Processes," by Richard P. Feynman is presented. It presents experiments on the rules of strangeness changing decays of particles in the fields of theoretical physics and quantum mechanics. It also describes two conservation laws which are...

  • 15: Fundamental Laws of Electromagnetic and β-Decay Coupling.  // Theory of Fundamental Processes;1998, p67 

    Chapter 15 of the book "The Theory of Fundamental Processes," by Richard P. Feynman is presented. It describes two processes in the fields of theoretical physics and quantum mechanics such as electromagnetic and beta-decay coupling laws. It also illustrates how quantitative calculations for...

  • Nucleus-nucleus interaction in the perturbative QCD. Braun, M. A. // European Physical Journal C -- Particles & Fields;Mar2004, Vol. 33 Issue 1, p113 

    The nucleus-nucleus interaction is studied in the framework of the perturbative QCD with Nc→∞ and a fixed coupling constant. The pomeron tree diagrams are summed by an effective field theory. The classical field equations are solved by an iteration procedure, which is found to be...

  • 12: Decay of Strange Particles.  // Theory of Fundamental Processes;1998, p55 

    Chapter 12 of the book "The Theory of Fundamental Processes," by Richard P. Feynman is presented. It explores a process called decay of strange particles in theoretical physics and quantum mechanics. It also describes the concept of Fermi coupling schemes and a proposal on symmetry rules of the...


Read the Article


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

Try another library?
Sign out of this library

Other Topics