We fabricated SiGe/Si free-standing micro-objects on a silicon-on-insulator (SOI) substrate using the SiO2 sacrificial layer. SiGe/Si strained films were grown by molecular beam epitaxy on SOI substrates. The films were released from the substrate by selective etching of the SiO2 layer. The released films rolled up due to the elastic strain in the SiGe layer. Microtubes and microspirals with a diameter of about 40 μm were obtained.
A spectral phase-crossing algorithm for the analysis of white-light fringes obtained by use of a color-insensitive camera is presented. The technique searches for the zero group-velocity optical path difference (OPD) position from a crossing point of two phases of spectrally resolved fringes, which are obtained from the Fourier spectra of white-light interferograms.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.