Nobel Laureate Explores New Worlds With Attosecond Laser Pulses

Recently, Dr. Anne L'Huillier, one of last year's Nobel Prize winners in physics, and other researchers, including physicist Dr. Jan Vogelsang of the University of Oldenburg, used attosecond laser pulses in conjunction with a photoelectron microscope (PEEM) to follow the dynamics of electrons released from the surface of zinc oxide crystals. The research further demonstrates the utility of the attosecond laser pulse technique in the field of nanomaterials and novel solar cells.
Nobel Prize winner explores "new worlds" with attosecond laser pulses
The so-called Extreme Ultraviolet (EUV) attosecond laser pulse is actually a special type of laser pulse with a wavelength in the Extreme Ultraviolet (EUV) band and an extremely short duration of attoseconds, which is one of the fastest known units of time. As a result, attosecond pulses are extremely time-resolved and are capable of capturing very fast processes or transient events.
For extreme ultraviolet attosecond laser pulses, their generation requires the use of high-energy lasers and a series of pulse compression and amplification techniques. Such laser pulses have a wide range of applications in scientific research, high-precision measurements, and materials science. For example, it can be used to study the dynamic processes of chemical reactions, electronic behavior in materials, and so on.
Currently published in the scientific journal Advanced Physical Research, the researchers have successfully combined attosecond microscopy and photoemission electron microscopy without sacrificing temporal or spatial resolution, finally realizing the use of attosecond laser pulses to study light-matter interactions originating from the horizontal and nanostructures.
The use of a light source capable of generating a large number of attosecond pulse flashes per second (in this case, 200,000 light pulses per second) was one of the factors that made this possible. Scientists were able to study the behavior of the flashes without interfering with each other because each flash releases an average of one electron from the surface of the crystal. The more pulses generated per second, the easier it is to extract small measurement signals from the data set.