The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
We for the first time demonstrated a chiral mono-crystalline cone-shaped silicon structure (chiral Si nano-cone). It was fabricated on a nano-scale by transferring the optical angular momentum of optical vortex to a mono-crystalline Si substrate.
Optical vortices with a helical wavefront due to a phase singularity, and circularly polarized light with a helical electric field have an orbital angular momentum (Lħ) and a spin angular momentum (Sħ), respectively. Consequently, a circularly polarized optical vortex will carry the total angular momentum (Jħ=Lħ+Sħ), defined by the vector sum of the orbital and spin angular momenta. In recent years,...
We discovered that chiral-structure of nano-needles fabricated by optical vortex laser ablation can be controlled by changing the magnitude of orbital angular momentum. We also demonstrated the formation of a chiral Si-bump.
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.