Laboratory of Cold Atoms Near Surfaces

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Internships and bachelor theses for the academic year 2016/207

  • internship: Experiments with cold atoms
  • internship: Digital holography
  • bachelor thesis: Cold atoms at gold nanostructures

Details are to find here (in Polish only).

 

Poster session of the Advanced Physics Laboratory

Here we present two posters (in Polish) prepared by biophysics students for the XVIII Student Poster Session of the Advanced Physics Laboratory: Optical pumping (first place) and Dissociation energy of I2 molecule (distinction).

Optical pumping - poster
Dissociation energy of I2 molecule - poster


 

Recently on the sky

supernumerary rainbow in Cracow
transit of Mercury in front of the Sun 2016

On the left image there is a supernumerary rainbow – a rarely seen effect caused not only by common reflection, refraction and dispersion of light in water droplets, but also by interference. The rainbow was seen in Kraków on the 25th of April 2016 in the afternoon.

Right image shows transit of Mercury in front of the Sun on the 9th of May 2016. The picture was taken at 15:55 (local time) using Panasonic DMC-FZ45 with Baader 5.0 foil filter.

In both images the contrast was strongly increased.

 

Optical dipole trap

Here we show images of cold atomic clouds in an optical dipole trap loaded from MOT (Magneto-Optical Trap):


optical dipole trap

a) about 120 thousands atoms in a trap formed in the waist of 1083 nm laser beam at a power of 8 W. The atoms were kept in the trap for 90 ms before the photo was taken.

b) about 100 thousand atoms in crossed dipole traps formed in 1083 nm (8 W) and 785 nm (0.4 W) laser beams. Below the dipole trap there is a cloud of atoms from the MOT trap falling under gravity. The atoms were kept in the trap for 20 ms.

Atom cloud temperature is about 5 μK. The width of the picture is about 8.5 mm.

 

Bachelors' theses under preparation in 2015/2016

During this academic year there are three bachelors' theses under preparation in the field of computer science:

  • Database of proposed topics of masters' and bachelors' theses as well as internships at our Faculty (Iwona Winiarska)
  • Database of conferences organized by our Faculty (Paweł Dzięcioł)
  • Wireless sensor of magnetic field, linear acceleration and angular velocity (Przemysław Olaszański)
 

Bachelors' theses prepared during academic year 2014/2015

In the course of academic year 2014/2015 there were prepared two bachelors' theses in the field of surface plasmon polaritons:

1. Plasmonic detector for rubidium atoms, author: Michał Mandrysz

The aim of this work was to create a plasmon detector with high detection sensitivity for later use in the detection of rubidium atoms in a dipole optical mirror for cold atoms. This work contains theoretical predictions, comparison of known methods of detection, description and simulation of the system that was made from scratch in the Laboratory of Cold Atoms Near Surfaces, as well as some sample results using gases – helium and nitrogen. An important characteristics of this phase detector is the size of the element, where the detection takes place – it's cross-section is comparable to the size of the laser beam and the thickness is of the same order of magnitude as the wavelength of the laser beam used at the detection. The sensitivity is 8×10-8 RIU (index of refraction units) – three orders of magnitude better than for amplitude detectors.

2. Plasmonic platform for cold atoms, author: Zuzanna Orzechowska

It was measured experimentally how the thermal scattering of surface plasmon polaritons influences a adsorption and desorption of rubidium atoms from a gold layer under UHV conditions.


Iwona Gajewska prepared a web application allowing to send orders to our Mechanical Workshop via a web browser.

 


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