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科学家们已找到了用于研究半导体纳米结构和大气成分的一种便利的辐射源,其发射波段在远红外区.为此目标,Dartmouth学院的研究者们做出了一个结构紧凑的小功率自由电子激光器,它可产生10 μm～1mm的可调谐相干光束,并改装了一个扫描电子显微镜用以发送一个电子束通过一个金属衍射光栅,经电磁耦合形成发射出红外光的振荡阵列.调节衍射光栅的周期可以调谐发射光的波长.(NO.37)
Scientists have found a convenient source of radiation for the study of semiconductor nanostructures and atmospheric constituents in the far-infrared emission band, and to this end, researchers at Dartmouth College have made a compact, low-power, low-power An electron laser produces a tunable coherent beam of 10 μm to 1 mm and is modified with a scanning electron microscope to send an electron beam through a metal diffraction grating that is electromagnetically coupled to form an oscillating array of infrared- The wavelength of the emitted light can be tuned (NO.37)