A versatile experimental setup for femtosecond time-resolved ellipsometry and magneto-optical Kerr effect measurements in the visible light range is described. The apparatus is based on the pump-probe technique and combines a broad-band probing beam with an intense near-infrared pump. According to Fresnel scattering matrix formalism, the analysis of the reflected beam at different polarization states of the incident probe light allows one to determine the diagonal and the off-diagonal elements of the dielectric tensor in the investigated sample. Moreover, the pump-probe method permits to study the dynamics of the dielectric response after a short and intense optical excitation. The performance of the experimental apparatus is tested on CrO2 single crystals as a benchmark.
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January 2015
Research Article|
January 29 2015
A flexible experimental setup for femtosecond time-resolved broad-band ellipsometry and magneto-optics
F. Boschini;
F. Boschini
1
Dipartimento di Fisica, Politecnico di Milano
, p.zza Leonardo da Vinci 32, 20133 Milano, Italy
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H. Hedayat;
H. Hedayat
1
Dipartimento di Fisica, Politecnico di Milano
, p.zza Leonardo da Vinci 32, 20133 Milano, Italy
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C. Piovera;
C. Piovera
1
Dipartimento di Fisica, Politecnico di Milano
, p.zza Leonardo da Vinci 32, 20133 Milano, Italy
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C. Dallera;
C. Dallera
1
Dipartimento di Fisica, Politecnico di Milano
, p.zza Leonardo da Vinci 32, 20133 Milano, Italy
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A. Gupta;
A. Gupta
2
Department of Chemistry, University of Alabama
, Tuscaloosa, Alabama 35487, USA
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E. Carpene
E. Carpene
a)
3
CNR-IFN, Dipartimento di Fisica, Politecnico di Milano
, p.zza Leonardo da Vinci 32, 20133 Milano, Italy
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F. Boschini
1
H. Hedayat
1
C. Piovera
1
C. Dallera
1
A. Gupta
2
E. Carpene
3,a)
1
Dipartimento di Fisica, Politecnico di Milano
, p.zza Leonardo da Vinci 32, 20133 Milano, Italy
2
Department of Chemistry, University of Alabama
, Tuscaloosa, Alabama 35487, USA
3
CNR-IFN, Dipartimento di Fisica, Politecnico di Milano
, p.zza Leonardo da Vinci 32, 20133 Milano, Italy
a)
Electronic address: [email protected]
Rev. Sci. Instrum. 86, 013909 (2015)
Article history
Received:
September 26 2014
Accepted:
January 14 2015
Citation
F. Boschini, H. Hedayat, C. Piovera, C. Dallera, A. Gupta, E. Carpene; A flexible experimental setup for femtosecond time-resolved broad-band ellipsometry and magneto-optics. Rev. Sci. Instrum. 1 January 2015; 86 (1): 013909. https://doi.org/10.1063/1.4906756
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