ELFT HÍRADÓ

[<vera.horvath AT eli-alps.hu>]

Meghívó az ELI-ALPS szemináriumára

Előadó:                Varró Sándor (ELI-ALPS, Wigner RCP)
Cím:                     Wide-angle interference of a single-photon emitter
for measuring its position on nanometer scale
Helyszín:             Szeged, Dugonics tér 13. fsz. 5.
Időpont:             2016. november 25. 9 óra

Az előadás rövid összefoglalója:

Single-photon wide-angle intereference phenomena have been studied
theoretically for glass-diamond-oil and glass-diamond-air layered structures.
As a single optical emitter (of wavelength e.g. 637 nm) one  nitrogen-vacancy
center (NV-center) has been assumed, which is placed close to the upper side
of a diamond plate, and it was represented by a Hertzian dipole of arbitrary
orientation. The interference fields can be imagined as resultans of
superposition of rays emanating from the NV-center directly upwards and from
those which are emanating downwards and undergo total internal reflection at
the lower surface of the diamond plate of thickness  e.g. 0.1mm = 100000 nm.
The direct and the reflected rays recombine on the upper side, and we have
proved that also the far-field interference pattern is sensitive to the
vertical position of the NV-center. As is seen, e.g. 2nm difference in
distance of the emitter from the upper surface of the diamont results in an
angular shift of order 0.01 degree of the pattern, which should already be a
measurable effect.

Minden érdeklődőt szívesen látunk.