TY - JOUR
T1 - Diffraction-limited coherent wake emission
AU - Porat, E.
AU - Yehuda, H.
AU - Cohen, I.
AU - Levanon, A.
AU - Pomerantz, I.
N1 - Publisher Copyright:
© 2021 authors.
PY - 2021/9/1
Y1 - 2021/9/1
N2 - The plasma mirror is a relativistic optical element that under certain irradiation conditions generates intense attosecond extreme-ultraviolet light pulses, in a process known as coherent wake emission (CWE). CWE has been previously characterized by its high spatial divergence, originating from an intrinsic intensity-dependent phase accumulation. In this Letter, we show that the transverse variations of the plasma expansion can completely cancel the CWE intrinsic phase. Accordingly, we experimentally demonstrate nearly diffraction-limited CWE with unprecedented divergence, under 6 mrad. We validate our analytical model with particle in cell simulations. This understanding facilitates the development of plasma mirrors as applicable ultraviolet light sources.
AB - The plasma mirror is a relativistic optical element that under certain irradiation conditions generates intense attosecond extreme-ultraviolet light pulses, in a process known as coherent wake emission (CWE). CWE has been previously characterized by its high spatial divergence, originating from an intrinsic intensity-dependent phase accumulation. In this Letter, we show that the transverse variations of the plasma expansion can completely cancel the CWE intrinsic phase. Accordingly, we experimentally demonstrate nearly diffraction-limited CWE with unprecedented divergence, under 6 mrad. We validate our analytical model with particle in cell simulations. This understanding facilitates the development of plasma mirrors as applicable ultraviolet light sources.
UR - http://www.scopus.com/inward/record.url?scp=85114961005&partnerID=8YFLogxK
U2 - 10.1103/PhysRevResearch.3.L032059
DO - 10.1103/PhysRevResearch.3.L032059
M3 - Article
AN - SCOPUS:85114961005
SN - 2643-1564
VL - 3
JO - Physical Review Research
JF - Physical Review Research
IS - 3
M1 - L032059
ER -