We report Raman lasing and the optical analog of electromagnetically-induced-transparency(EIT) in a whispering-gallery-mode(WGM) microtoroid resonator embedded
In recent years, studies show that coal formed during marine transigression process is also important in coal accumulation basin. Still, the characteristics of
The Ministry of Foreign Trade and EconomicCooperation(Moftec)has raised the exportquotas for silver in 2001 and it granted 10 pro-ducers or trading companies t