Колоквијум Института за физику 10.12.2015.

Колоквијум Института за физику

Одржаће се у четвртак, 10.12.2015. године у читаоници Института за физику ”Драган Поповић” у 13:00.

Прво предавање под називом

POLISH OPTICAL ATOMIC CLOCK

одржаће Јerzy Zachorowski (Photonics Department, Jagiellonian University, Krakow, Poland)

Друго предавање под називом

RESEARCH ON NITROGEN VACANCY COLOR CENTER

одржаће Wojciech Gawlik (Photonics Department, Jagiellonian University, Krakow, Poland)

 

Заједнички апстракт:
 
The talks will present two fields of activity of the Photonic Departments of the Jagiellonian University in Krakow:
1) The construction of the strontium optical atomic clock.
2) The experiments on Nitrogen Vacancy color centers in diamond.
 
The time and frequency standards have the best accuracy of all the SI units. Nevertheless, research on new standards of much higher accuracy and stability are undertaken. They concentrate mostly on clocks using optical transitions instead of microwave ones. Nitrogen vacancy (NV) color centers in diamond play a role of artificial atom, enabling attractive
applications. In our experiments spin polarization of NV centers is created by optical excitation and monitored by microwave resonance (ESR technique) in the temperature range
from 10 to 300 K. The talkwill present the construction details of the strontium optical atomic clock built in Poland, recent results on absolute measurement of the clock transition in
bosonic Sr88 and the novel studies of the coherent dynamics and relaxation processes in NVs with the methods of microwave spectroscopy.