Efficient Diffractive Phase Optics for Electrons
نویسندگان
چکیده
1. Department of Physics, University of Oregon, Eugene, Oregon 2 Center for Nanoscale Science and Technology, National Institute of Standards and Technology, Gaithersburg, Maryland and Department of Electrical Engineering, Syracuse University, Syracuse, New York 3 National Center for Electron Microscopy, Lawrence Berkeley National Laboratory, Berkeley, California 4 Center for Nanoscale Science and Technology, National Institute of Standards and Technology, Gaithersburg, Maryland and Department of Physics, University of Oregon, Eugene, Oregon
منابع مشابه
Programmable diffractive optical element using a multichannel lanthanum-modified lead zirconate titanate phase modulator.
We introduce a programmable diffractive optical element based on an electro-optic phased array implemented with a multichannel lanthanum-modified lead zirconate titanate phase modulator. The design and fabrication procedures are outlined, along with an experimental demonstration of the device. Experimental results from a 16-channel device operating with a 2pi ; voltage of 300 V demonstrate sele...
متن کاملPtychographic electron microscopy using high-angle dark-field scattering for sub-nanometre resolution imaging
Diffractive imaging, in which image-forming optics are replaced by an inverse computation using scattered intensity data, could, in principle, realize wavelength-scale resolution in a transmission electron microscope. However, to date all implementations of this approach have suffered from various experimental restrictions. Here we demonstrate a form of diffractive imaging that unshackles the i...
متن کاملEfficient coherent diffractive imaging for sparsely varying objects.
We demonstrate an efficient phase-retrieval method, allowing the recovery of features of dynamic objects that are sparsely varying--i.e. when the difference between two consecutive frames is small. The method uses redundancy in information between similar consecutive frames to recover the features more robustly than current phase-retrieval methods, and necessitates a considerably smaller number...
متن کاملDiffractive generalized phase contrast for adaptive phase imaging and optical security.
We analyze the properties of Generalized Phase Contrast (GPC) when the input phase modulation is implemented using diffractive gratings. In GPC applications for patterned illumination, the use of a dynamic diffractive optical element for encoding the GPC input phase allows for on-the-fly optimization of the input aperture parameters according to desired output characteristics. For wavefront sen...
متن کاملCoplanar refractive-diffractive doublets for optoelectronic integrated systems.
A coplanar refractive-diffractive doublet array employing surface-relief diffractive phase elements embedded within poly(methyl methacrylate) microlenses is introduced as an optomechanical building block for optoelectronic integrated systems. The design method, fabrication technology, and results are described. Coplanarity of the quadratic- and linear-phase elements constituting the doublet can...
متن کامل