102 research outputs found
Coherent control of solid state nuclear spin nano-ensembles
Detecting and controlling nuclear spin nano-ensembles is crucial for the
further development of nuclear magnetic resonance (NMR) spectroscopy and for
the emerging solid state quantum technology. Here we present the fabrication of
a 1 nanometre thick diamond layer consisting of C nuclear
spins doped with Nitrogen-Vacancy centres (NV) embedded in a spin-free C
crystal matrix. A single NV in the vicinity of the layer is used for
polarization of the C spins and the readout of their magnetization. We
demonstrate a method for coherent control of few tens of nuclear spins by using
radio frequency pulses and show the basic coherent control experiments - Rabi
oscillations, Ramsey spectroscopy and Hahn echo, though any NMR pulse sequence
can be implemented. The results shown present a first steps towards the
realization of a nuclear spin based quantum simulator
Elimination, reversal, and directional bias of optical diffraction
We experimentally demonstrate the manipulation of optical diffraction,
utilizing the atomic thermal motion in a hot vapor medium of
electromagnetically-induced transparency (EIT). By properly tuning the EIT
parameters, the refraction induced by the atomic motion may completely
counterbalance the paraxial free-space diffraction and by that eliminates the
effect of diffraction for arbitrary images. By further manipulation, the
diffraction can be doubled, biased asymmetrically to induced deflection, or
even reversed. The latter allows an experimental implementation of an analogy
to a negative-index lens
High Expression Levels of Total IGF-1R and Sensitivity of NSCLC Cells In Vitro to an Anti-IGF-1R Antibody (R1507)
© 2009 Gong et al
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