; Andrews, Joy C.
; Pianetta, Piero] SLAC Natl Accelerator Lab, Stanford Synchrotron Radiat Lightsource, Menlo Pk, CA 94025 USA
; [Wang, Junyue] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA
; [Meirer, Florian] Fdn Bruno Kessler, I-38050 Povo, Italy
; [Zhu, Peiping
; Wu, Ziyu] Inst High Energy Phys, Beijing Synchrotron Radiat Facil, Beijing 100049, Peoples R China
; [Wu, Ziyu] Univ Sci & Technol China, Natl Synchrotron Radiat Lab, Hefei 230027, Peoples R China
An alternative method for quantitative phase retrieval in a transmission X-ray microscope system at sub-50-nm resolution is presented. As an alternative to moving the sample in the beam direction in order to analyze the propagation-introduced phase effect, we have illuminated the TXM using X-rays of different energy without any motor movement in the TXM system. Both theoretical analysis and experimental studies have confirmed the feasibility and the advantage of our method, because energy tuning can be performed with very high energy resolution using a double crystal monochromator at a synchrotron beam line, and there is zero motor error in TXM system in our approach. High-spatial-resolution phase retrieval is accomplished using the proposed method. (C) 2011 Optical Society of America