Single-shot picosecond interferometry with one-nanometer resolution for dynamical surface morphology using a soft X-ray laser.
Using highly coherent radiation at a wavelength of 13.9 nm from a Ag-plasma soft X-ray laser, we constructed a pump-and-probe interferometer based on a double Lloyd's mirror system. The spatial resolutions are evaluated with a test pattern, showing 1.8-mum lateral resolution, and 1-nm depth sensitivity. This instrument enables a single-shot observation of the surface morphology with a 7-ps time-resolution. We succeeded in observing a nanometer scale surface dilation of Pt films at the early stage of the ablation process initiated by a 70 fs near infrared pump pulse.
Suemoto
Tohru
T
Institute for Solid State Physics, The University of Tokyo, Kashiwa-shi, Chiba, Japan.
Terakawa
Kota
K
Ochi
Yoshihiro
Y
Tomita
Takuro
T
Yamamoto
Minoru
M
Hasegawa
Noboru
N
Deki
Manato
M
Minami
Yasuo
Y
Kawachi
Tetsuya
T
D004867:Equipment Design; D007368:Interferometry / Q000379:methods*; D007834:Lasers; D008855:Microscopy, Electron, Scanning; D008962:Models, Theoretical; D053758:Nanoparticles; D036103:Nanotechnology / Q000295:instrumentation* / Q000379:methods*; D010984:Platinum; D012822:Silicon Dioxide; D014466:Ultraviolet Rays; D014965:X-Rays
D010984:Platinum; D012822:Silicon Dioxide