Berlin 2015 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
HL: Fachverband Halbleiterphysik
HL 95: Poster IV B (Quantum dots and wires: Prepration, characterization, optical properties, and transport)
HL 95.9: Poster
Donnerstag, 19. März 2015, 14:00–20:00, Poster B
Optical Coupling of Whispering-Gallery Modes of Two Microdisks — •Tilmann John1, Fabian Hargart1, Matthias Paul1, Michael Jetter1, Tsung-Li Liu2, Evelyn Hu2, and Peter Michler1 — 1Institut für Halbleiteroptik und Funktionelle Grenzflächen, Universität Stuttgart, Allmandring 3, 70569 Stuttgart — 2School of Engeneering and Applied Sciences, Harvard University, 29 Oxford Street, Cambridge, MA 02138
Coupling dynamics between optical resonators generates much interest with possible applications e.g. in quantum information processing.
Microdisk dimers supporting high-quality and small mode volume whispering gallery modes are well suited candidates for the formation of photonic molecules.
Here, we investigate the coupling of two closely spaced GaInP microdisks with an inter disk separation below 100 nm. Local laser heating is used to overcome spectral mode detuning which results from the size mismatch of the two disks. To improve the local laser heating new structures with an additional heating layer are examined allowing the tuning of the cavity dimers independent of the excitation of single quantum dots coupled to the supermode.
In addition, by using a setup for imaging the dimers, we show an attractive way to observe the optical mode profile immediatedly.
To improve the coupling of the evanescent field of the WGMs between the disks, a new approach is to deform the disks to a more rectangular shape with rounded corners. We numerically investigate this approach using the Finite-difference time-domain method.