The work described in this thesis concerns the filling of Single-Walled Carbon Nanotubes (SWNTs) with semiconductor compounds (HgTe, HgxCd1-xTe, InSb, SnSe). Once successfully introduced into the SWNTs, the fillings were structurally analysed via focal series restoration High Resolution Transmission Electron Microscopy (HRTEM). For each system, models were proposed, simulated and compared with original restored phase images.