 | Kalkum F. Efficient light transmission through single sub-wavelenght holes: Diss. … Dr. rer. nat. / Universität Bonn, Physikalisches Institut. - Bonn: Physikalisches Inst., 2009. - ii, 90 p.: ill., graph. - (Bonn-IR; 2009-11). - ISSN 0172-8741
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1 Introduction ................................................. 1
2 Sub-wavelength holes ......................................... 3
2.1 Theory .................................................. 4
2.2 Experiments ............................................. 6
2.3 Applications ............................................ 8
3 Fabry-Perot enhancement ...................................... 9
3.1 Background .............................................. 9
3.2 Methods ................................................ 13
3.3 Results ................................................ 16
3.4 Discussion ............................................. 20
3.4.1 Interpretation of experimental data ............. 20
3.4.2 Substantiating the theoretical considerations ... 21
3.4.3 Further improvements ............................ 21
3.5 Summary ................................................ 22
4 Holographic method .......................................... 23
4.1 Background ............................................. 25
4.1.1 Photorefractive effect in iron-doped lithium
niobate crystals ................................ 26
4.1.2 Change of the dielectric constant ............... 30
4.1.3 Diffraction from volume holograms ............... 30
4.1.4 Holographic scattering .......................... 35
4.2 Methods ................................................ 36
4.2.1 Sample crystal .................................. 36
4.2.2 Optical setup ................................... 39
4.2.3 Measurement procedure ........................... 43
4.3 Results ................................................ 45
4.3.1 Plane-wave holography ........................... 45
4.3.2 Tight focusing .................................. 46
4.3.3 Evolution of the diffraction efficiency ......... 47
4.3.4 Angular selectivity ............................. 49
4.3.5 Razor-blade method .............................. 49
4.3.6 Summary of the experimental results ............. 54
4.4 Discussion ............................................. 55
4.4.1 Diffraction efficiency in the plane-wave case ... 55
4.4.2 Dynamics of the recording ....................... 57
4.4.3 Holography of a point source .................... 59
4.4.4 Optimizing holography through a hole ............ 76
4.5 Summary ................................................ 79
5 Summary ..................................................... 81
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