Malm Erik B, Monserud Nils C, Brown Christopher G, Wachulak Przemyslaw W, Xu Huiwen, Balakrishnan Ganesh, Chao Weilun, Anderson Erik, Marconi Mario C
Engineering Research Center for Extreme Ultraviolet Science and Technology, and Electrical and Computer Engineering Department, Colorado State University, Fort Collins, Colorado 80523, USA.
Opt Express. 2013 Apr 22;21(8):9959-66. doi: 10.1364/OE.21.009959.
We demonstrate single and multi-shot Fourier transform holography with the use of a tabletop extreme ultraviolet laser. The reference wave was produced by a Fresnel zone plate with a central opening that allowed the incident beam to illuminate the sample directly. The high reference wave intensity allows for larger objects to be imaged compared to mask-based lensless Fourier transform holography techniques. We obtain a spatial resolution of 169 nm from a single laser pulse and a resolution of 128 nm from an accumulation of 20 laser pulses for an object ~11x11μm(2) in size. This experiment utilized a tabletop extreme ultraviolet laser that produces a highly coherent ~1.2 ns laser pulse at 46.9 nm wavelength.
我们展示了使用桌面型极紫外激光进行单次和多次傅里叶变换全息术。参考波由一个带有中心开口的菲涅耳波带片产生，该开口允许入射光束直接照射样品。与基于掩模的无透镜傅里叶变换全息术技术相比，高参考波强度使得能够对更大的物体进行成像。对于尺寸约为11×11μm²的物体，我们从单个激光脉冲获得了169nm的空间分辨率，从20个激光脉冲的累积中获得了128nm的分辨率。该实验使用了一台桌面型极紫外激光，它在46.9nm波长处产生一个高度相干的约1.2ns激光脉冲。
