Surface magneto-plasmons in magnetic multilayers - Walther ...

Contents
1 Introduction 1
2 Theory 5
2.1 Surface Plasmon Polaritons . . . . . . . . . . . . . . . . . . . . . . . 5
2.2 Dispersion relation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.2.1 Kretschmann-Raether configuration . . . . . . . . . . . . . . . 11
2.3 Reflectivity of surface plasmons . . . . . . . . . . . . . . . . . . . . . 13
2.3.1 Reflectivity of a single layer . . . . . . . . . . . . . . . . . . . 14
2.3.2 Surface plasmons at rough surfaces . . . . . . . . . . . . . . . 17
2.3.3 Reflectivity at a multilayer system . . . . . . . . . . . . . . . 17
2.4 Simulation of the reflectivity of surface plasmons . . . . . . . . . . . . 22
2.4.1 Surface plasmons in different materials . . . . . . . . . . . . . 25
2.5 Magnetic field dependence of surface plasmons . . . . . . . . . . . . . 27
2.5.1 Interaction of an external magnetic field with light in condensed
matter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
2.5.2 Change of the dispersion relation of surface plasmons . . . . . 29
2.5.3 Surface plasmon enhanced electromagnetic field . . . . . . . . 31
2.6 Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
3 Excitation of surface plasmon polaritons 33
3.1 Experimental setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
3.2 Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
3.3 Alignment procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
4 Experimental study of surface plasmons in thin metallic films 49
4.1 Surface Plasmons in thin silver films . . . . . . . . . . . . . . . . . . 49
4.1.1 Comparison of UA-B and UA . . . . . . . . . . . . . . . . . . . 51
4.1.2 Adjustment of nBK7 . . . . . . . . . . . . . . . . . . . . . . . . 55
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