4 research outputs found
Elliptical micropillars for efficient generation and detection of coherent acoustic phonons
Coherent acoustic phonon generation and detection assisted by optical resonances are at the core of efficient optophononic transduction processes. However, when dealing with a single optical resonance, the optimum generation and detection conditions take place at different laser wavelengths, i.e. different detunings from the cavity mode. In this work, we theoretically propose and experimentally demonstrate the use of elliptical micropillars to reach these conditions simultaneously at a single wavelength. Elliptical micropillar optophononic resonators present two optical modes with orthogonal polarizations at different wavelengths. By employing a cross-polarized scheme pump-probe experiment, we exploit the mode splitting and couple the pump beam to one mode while the probe is detuned from the other one. In this way, at a particular micropillar ellipticity, both phonon generation and detection processes are enhanced. We report an enhancement of a factor of ~3.1 when comparing the signals from elliptical and circular micropillars. Our findings constitute a step forward in tailoring the light-matter interaction for more efficient ultrahigh-frequency optophononic devices
Generation and Spatial Control of Hybrid Tamm Plasmon/Surface Plasmon Modes
In
this Letter we experimentally demonstrate the coupling between
Tamm plasmon and surface plasmon modes in a metal/semiconductor integrated
microstructure. The Tamm plasmon mode is excited by the photoluminescence
of quantum dots grown in the top part of a dielectric Bragg mirror
covered by a silver layer. The hybrid nature of such a Tamm plasmon/surface
plasmon mode is demonstrated by the observation of a spatial beating
along the propagation. Experimental results are in very good agreement
with numerical calculations. We show how such a structure can be used
and further optimized to create surface plasmons through electrical
pumping. These results pave the way to a new generation of hybrid
metal/semiconductor integrated optical devices for both energy-sensitive
surface detection and electrical excitation of surface plasmons
3048512.pdf
The Supplemental Document provides details on the theoretical model used to simulate the polarization tomography experiment
Supplement 1: Scalable performance in solid-state single-photon sources
We deduce area distribution; show visibility power-dependence; deduce a model for visibility versus temporal distance; and describe how indistinguishability is obtained with the resonant-excitation method. Originally published in Optica on 20 April 2016 (optica-3-4-433