Sparsity-based super-resolved coherent diffraction imaging of one-dimensional objects

Pavel Sidorenko, Ofer Kfir, Yoav Shechtman, Avner Fleischer, Yonina C. Eldar, Mordechai Segev, Oren Cohen

פרסום מחקרי: פרסום בכתב עתמאמרביקורת עמיתים

תקציר

Phase-retrieval problems of one-dimensional (1D) signals are known to suffer from ambiguity that hampers their recovery from measurements of their Fourier magnitude, even when their support (a region that confines the signal) is known. Here we demonstrate sparsity-based coherent diffraction imaging of 1D objects using extreme-ultraviolet radiation produced from high harmonic generation. Using sparsity as prior information removes the ambiguity in many cases and enhances the resolution beyond the physical limit of the microscope. Our approach may be used in a variety of problems, such as diagnostics of defects in microelectronic chips. Importantly, this is the first demonstration of sparsity-based 1D phase retrieval from actual experiments, hence it paves the way for greatly improving the performance of Fourier-based measurement systems where 1D signals are inherent, such as diagnostics of ultrashort laser pulses, deciphering the complex time-dependent response functions (for example, time-dependent permittivity and permeability) from spectral measurements and vice versa.

שפה מקוריתאנגלית
מספר המאמר8209
מספר עמודים8
כתב עתNature Communications
כרך6
מזהי עצם דיגיטלי (DOIs)
סטטוס פרסוםפורסם - 8 ספט׳ 2015

ASJC Scopus subject areas

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