Dresden 2014 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 57: Plasmonics and Nanooptics II
O 57.12: Vortrag
Mittwoch, 2. April 2014, 18:45–19:00, GER 38
Theoretical investigation of the emission statistics of a spaser — •Michael Gegg1,2, T. Sverre Theuerholz1, Andreas Knorr1, and Marten Richter1 — 1Institut für Theoretische Physik, Nichtlineare Optik und Quantenelektronik, Technische Universität Berlin, Hardenbergstr. 36, 10623 Berlin, Germany — 2Freie Universität Berlin, Berlin, Germany
Surface plasmons have recieved considerable attention over the past few years. Surface plasmons bypass the diffraction limit in conventional optics. Moreover they are bosonic quasiparticles, thus exhibiting the same rich quantum statistical phenomenology as photons and phonons.
We present a theoretical model for the interaction of an arbitrary number of identical quantum dots with a metal nanoparticle. The quantum dots act as a gain medium, inducing plasmons on the metal nanoparticle via dipole-dipole coupling [1]. This system was proposed as a candidate for a spaser [2] and it was employed to construct a nanosized laserlike device [3]. We analyse the plasmon statistics and its dependency on the number of quantum dots, dipole coupling and incoherent processes.
We find that the system reaches the spasing regime in all investigated cases for the limit of many quantum dots.
[1]T. Sverre Theuerholz, Alexander Carmele, Marten Richter and Andreas Knorr. Phys. Rev. B, 87, 2013 [2]M. I. Stockman. Nature Photon., 2, 2008 [3]M. A. Noginov, G. Zhu, A. M. Belgrave, R. Bakker, V. M. Shalaev, E. E. Narimanov, S. Stout, E. Herz, T. Suteewong and U. Wiesner. Nature, 460, 2009