Optical properties of nano-structured materials studied by means of interferometric techniques

TL;DRAbstract

In this thesis work we avail ourselves of optical interferometric techniques for the study of the optical properties of nano-structured materials. As a first step, we set up a multiple heterodyne scanning probe optical microscope (MH-SPOM). This apparatus allows to detect amplitude and phase of the optical field with sub-wavelength resolution. In addition, it is provided with other two capabilities: beam labelling and polarization sensitive detection system. The former allows to simultaneously illuminate the sample under investigation with both TE and TM polarized light and to discriminate the contribution of the different polarizations to the total detected field by means of the heterodyne signals. The latter allows to measure the polarization state of the light as it is transferred by the collecting SPOM system (probe +fiber ) to the detection system. By means of such an apparatus we investigate the response of un uncoated tapered fiber probe to the vectorial components of the electr

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