FTMC has welcomed another talented Doctor of Natural Sciences. The title was awarded to physicist Klemensas Laurinavičius from the FTMC Department of Optoelectronics, who defended his dissertation "Vector Optical Bullets in Free Space and Dispersive Medium", supervised by Dr Sergejus Orlovas.
We warmly congratulate our colleague and wish him great success in his future endeavors!
The dissertation investigates vector optical bullets - extremely short, precisely focused light pulses that retain their shape as they propagate, without undergoing diffraction or dispersion. In other words, they do not spread out or blur.
These "light bullets" are created using ultrafast femtosecond lasers and specialised optical devices. Interestingly, this phenomenon allows light to keep its shape even under "difficult circumstances".
"Non-diffracting light beams possess unique properties, such as beam self-reconstruction after encountering an obstacle. This means that even if part of the beam's intensity is blocked, its structure is restored behind the obstacle, including how the light was distributed - both in terms of direction (polarization) and brightness (intensity), " explains K. Laurinavičius.
"This property is especially important for applications of vector optical bullets in optical microscopy, laser technologies, and data transmission systems, where high resistance to external disturbances is essential. "
"Using advanced laser beam engineering, such beams can propagate faster than the speed of light or even in the opposite direction (with negative group velocity), without violating the laws of physics - since no information or matter is transferred in the beam. This feature is particularly interesting for applications in particle acceleration, materials processing, and similar fields," says the newly appointed PhD.
Source: FTMC