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We present recent progress on the development of nano-opto-electromechanical systems (NOEMS) for solid-state quantum photonics and discuss the application of optical switching networks for de-multiplexing single photons generated by semiconductor quantum dots.
Photonic-crystal waveguides are excellent model systems to investigate band-gap related phenomena in condensed matter physics. An example is the effect of disorder on the band edge. Even for state-of-the-art systems, the smallest effects of disorder are enhanced in the so-called slow-light regime, eventually leading to Anderson localization and, hence, breakdown of the transport of light. We employ...
A very smooth lasing transition in photonic crystal nanocavities with embedded quantum dots is observed and compared to the theory. Decay rate measurements reveal that only a few quantum dots are feeding the cavity.
Disorder in photonic-crystal slab waveguides can cause localization of light [1, 2]. Sapienza et al. observed that the interaction of localized light with embedded quantum dots is so strong that it yields a considerable Purcell enhancement of the emission rate [3]. This coupling between emitters and these “random cavities” warrants a more detailed investigation.
Photonic crystal nanolasers have attracted great interest both for fundamental research and applications in the past decade. In photonic crystal cavities, the leakage to optical modes is strongly reduced, which increases the spontaneous emission coupling factor, β. This is a crucial parameter for the threshold characteristics of lasers. With increasing β, the well-known step-like threshold behavior...
Optical cavity cooling of mechanical resonators has recently become a research frontier where cooling of the vibrational motion of the resonators has been realized via photo-thermal force [1] and subsequently via radiation pressure [2–4]. One of the ultimate goals is reaching the vibrational ground state allowing quantum mechanical states of vibration - and the field offers a potential for hybrid...
We have measured the variation of the spontaneous emission rate with polarization for self-assembled single quantum dots in two-dimensional photonic crystal membranes, and obtained a maximum anisotropy factor of 6 between the decay rates of the two nondegenerate bright states.
We measured time-resolved photoluminescence from large quantum dots near a semiconductor-air interface. Far from the interface our data are consistent with dipole theory, but near the interface they question the validity of the dipole approximation. c2008 Optical Society of America.
We measured time-resolved photoluminescence from large quantum dots near a semiconductor-air interface. Far from the interface our data are consistent with dipole theory, but near the interface they question the validity of the dipole approximation.
InAs quantum dots have been placed at different distances to a silver mirror. We extract the coupling of quantum dots to surface plasmon polaritons as a function of the distance by time-resolved spontaneous emission measurements.
Here we present quantitative measurements of the dipole moment of an ensemble of self-assembled quantum dots employing a modified optical local density of states (LDOS). The LDOS is controlled by varying the distance from the QDs to a semiconductor/air interface.
The wrappings and contents of 683 drug containers (bubbles) seized from 154 street dealers have been analysed since 2001, when the law enforcement policy in Hamburg, Germany, allowed the application of emetics to be used by so-called body stuffers for the recovery of swallowed drug packages. Of the bubbles recovered 96% contained cocaine. Cases of intoxication have not yet been observed but a 20-year-old...
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