Time-resolved pump-probe ellipsometry of the photoinduced insulator-metal transition in 25 nm VO2 thin films

Data available

Transient pseudo dielectric function and ellipsometric parameters (\Psi and \Delta) measured with a time-resolved pump-probe ellipsometry on a 25 nm VO2 film deposited on SiO2.

The data of the transient pseudo dielectric function and ellipsometric parameters (\Psi and \Delta) are provided for different pump wavelengths and pump fluences.

\lambda_{pump} = 400 nm - F_{pump} = 3.058 mJ/cm2

\lambda_{pump} = 400 nm - F_{pump} = 3.823 mJ/cm2

\lambda_{pump} = 400 nm - F_{pump} = 5.352 mJ/cm2

\lambda_{pump} = 400 nm - F_{pump} = 6.117 mJ/cm2

\lambda_{pump} = 400 nm - F_{pump} = 7.646 mJ/cm2

\lambda_{pump} = 800 nm - F_{pump} = 1.536 mJ/cm2

\lambda_{pump} = 800 nm - F_{pump} = 1.919 mJ/cm2

\lambda_{pump} = 800 nm - F_{pump} = 2.109 mJ/cm2

\lambda_{pump} = 800 nm - F_{pump} = 2.654 mJ/cm2

\lambda_{pump} = 800 nm - F_{pump} = 2.793 mJ/cm2

Naming of the files

In the .zip file that can be downloaded here, there are several folders.

Each are named as lambda_pump_XXX_nm_fluence_YYY_mJcm-2 where XXX is either 400 or 800 and YYY is the fluence value.

In each folder are four files.

diffdelta.txt - values of the transient ellipsometric parameter \Delta.

diffpsi.txt- values of the transient ellipsometric parameter \Delta.

diffpseudoepsilon1.txt- values of the real part of the transient pseudo dielectric function.

diffpseudoepsilon2.txt- values of the real part of the transient pseudo dielectric function.

Structure of the files

Each file has the same structure:

The first row an array time delays in picosecond for which measurements have been performed.

In the rest of rows, the first element of the array are the photon energy, while the rest of the elements are the values of the transient dielectric function or ellipsometric parameters (\Psi and \Delta) at each of the elements in the time delay array.

Example:

time delay       t1                         t2                           t3

E1(eV)      Delta(E1, t1)        Delta(E1, t2)          Delta(E1, t3)

E2(eV)      Delta(E2, t1)       Delta(E2, t2)         Delta(E2, t3)

E3(eV)      Delta(E3, t1)       Delta(E3, t2)         Delta(E3, t3)