[institut] Podsecanje- IPB Colloquium: J. Zachorowski & W. Gawlik, Thursday, 10 December, 13:00

[Diana Bralic Nebrigic]

Dear colleagues,

You are cordially invited to the double IPB COLLOQUIUM which will be 
held on Thursday, 10 December 2015 at 13:00 in the "Dragan Popović" 
library reading room of the Institute of Physics Belgrade. The first 
talk entitled

POLISH OPTICAL ATOMIC CLOCK

will be given by Jerzy Zachorowski (Photonics Department, Jagiellonian 
University, Krakow, Poland), and the second talk entitled

RESEARCH ON NITROGEN VACANCY COLOR CENTERS

will be given by Wojciech Gawlik (Photonics Department, Jagiellonian 
University, Krakow, Poland). Joint abstract for both talks:

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 
talk will 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.


Best regards,
Diana Bralić Nebrigić

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