We have trapped 2 micron, irregular shaped particles of diamond. Why? For now the answer is “why not”, but it may be a starting point for studying spins in Nitrogen-vacancy centres. In the video below, taken at atmospheric pressure, the diamond particle flickers a lot. We belive that this is because it is spinning, and this would be noticeable as it is in irregular shape.
At a pressure of 1mbar (1000 times less pressure than atmospheric) the behaviour of the diamond is very different, because there is no air to damp its motion in the trap. In the video below the exaggerated movement in clear.