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.
The refraction of evanescent waves at an air and optically pumped Ti:Sapphire interface is investigated. The experimental results qualitatively support the theory of optical gain-assisted evanescent wave conversion at a passive/active boundary.
We propose a far-field sub-wavelength imaging scheme, where evanescent waves from an object are converted to sustainable propagating waves by using optical gain. This approach does not rely on negative refraction, hyper-lenses, or plasmonic effects.
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.