Conferencias y seminarios
Viernes 13 de Septiembre de 2019
Sala de seminarios de Depto. de Física (Av. Blanco Encalada 2008, Santiago, Chile)
Instituto de Física, Centro de Investigación en Nanotecnología y Materiales Avanzados, Pontificia Universidad Católica de Chile
Over the last ten years, single electronic and nuclear spins associated to color centers in solid-state have gained great attention as leading candidates for quantum metrology applications due to the high degree of control that is possible to achieve of their internal degrees of freedom. As an example, the electronic spin associated to the nitrogen-vacancy color center in diamond can be optically prepared and readout at room temperature and shows millisecond-long coherence times. In this talk, we will introduce to the optical and magnetic properties of these nano-systems and, in particular, discuss about the role of their atomic configuration and symmetry on determining the dynamics of their internal degrees of freedom. Applications such as magnetic and electric sensing will be presented that are currently enabling new sensing schemes. In particular, a single electronic spin can be optically addressed using confocal microscopy and its emitted light can be detected using avalanche photon detectors. This fluorescence depends on the spin of the electron and therefore enables the monitoring of its evolution. Special attention will be given to the control of nuclear spins nearby color centers that, in combination, lead to ideal effective systems to implement concepts, such as stimulated Raman adiabatic passage, to gain control of individual nuclear spin degrees of freedom, which are otherwise invisible.