Berlin 2005 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe
Q: Quantenoptik und Photonik
Q 5: Poster Nichtlineare Optik
Q 5.7: Poster
Freitag, 4. März 2005, 11:00–12:30, Poster HU
Nanolaser and cavity-QED experiments using high-Q microsphere resonators — •H. Krauter1, A. Mazzei1, L. Menezes2, S. Götzinger3, V. Sandoghdar4 und O. Benson1 — 1Inst. für Physik, HU Berlin, Hausvogteiplatz 5-7, 10117 Berlin — 2Depto. de Fisica, Univ. Fed. de Pernambuco, 50670-901, Recife-PE, Brazil — 3Edward L. Ginzton Lab. Box S-79, Stanford University, Stanford,CA 94305-4088, USA — 4ETH Zürich, W.-Pauli-Str. 10 CH-8093 Zürich
Whispering gallery modes (WGMs) in microspheres experience very high quality factors, allowing the storage of light for up to microseconds. Single nanoparticles coupled to these WGM are promising candidates for the realization of nanolasers and controlled cavity-QED experiments. These experiments require both an optimization of the coupling of the emitters to the WGMs as well as an efficient outcoupling of the confined light. We established a method where we use near-field techniques [1] to control the coupling conditions of WGMs with nanoemitters. Nanoparticles are attached to the end of a near-field probe and placed in the evanescent field of WGMs close to the surface of microsphere resonators [2]. In this way we obtain nanometer precision and almost ultimate control of the coupling between the nanoparticle and the high-Q modes of the cavity. In this contribution we present and discuss several experiments which aim at the realization of a Raman nanolaser and a controlled cavity-QED system with single nanoemitters.
[1] S. Götzinger, O.Benson, V. Sandoghdar, Opt. Lett. 27, 80-82 (2002). [2] S. Götzinger, O. Benson, V. Sandoghdar, Appl. Phys. B. 73, 825-828 (2001).