Dr. Konstantins Jefimovs received his PhD degree in Physics from University of Joensuu (Finland) in 2003. His main research field there was plasmonics and development of technologies for the fabrication of diffractive optical elements for scientific and commercial applications. In 2005 he moved to Paul Scherrer Institut, where he worked as a postdoc researcher on fabrication of focusing optics for x-ray microscopy applications. One of his achievements was the fabrication of Fresnel zone plates with record resolution achieved in scanning x-ray microscopy at that time. From 2007 to 2013 he was researcher at EMPA, where his main research was focused on fabrication technologies based on laser ablation and focused ion beam milling techniques. His main research interests were in the fields of x-ray optics, photonics, plasmonics and metamaterials, as well as the development of novel technologies for wide range of applications related to optics. In 2013 he re-joined PSI as a member of TOMCAT group, where his main focus is currently the development of methods for the fabrication of small pitch, large area gratings for phase contrast x-ray and neutron imaging applications.

Full publication list is available on ResearcherID:

L. Romano, J. Vila-Comamala, K. Jefimovs, M. Stampanoni, “High‐aspect‐ratio grating microfabrication by platinum‐assisted chemical etching and gold electroplating,” Advanced Engineering Materials (in press 2020) 2000258. DOI 10.1002/adem.202000258 DORA

C. Arboleda, Z. Wang, K. Jefimovs, T. Koehler, U. van Stevendaal, N. Kuhn, B. David, S. Prevrhal, K. Lang, S. Forte, R. A. Kubik-Huck, C. Leo, G. Singer, M. Marcon, A. Boss, E. Roessl, M. Stampanoni, “Towards clinical grating-interferometry mammography,” Europen Radiology 30 (2020) 1419-1425. DOI: 10.1007/s00330-019-06362-x DORA

J. Valsecchi, M. Strobl, R. P. Harti, C. Carminati, P. Trtik, A. Kaestner, C. Grunzweig, Z. Wang, K. Jefimovs, M. Kagias, “Characterization of oriented microstructures through anisotropic small-angle scattering by 2D neutron dark-field imaging,” Communication Physics 42 (2020) 42. DOI: 10.1038/s42005-020-0308-4 DORA

M. Kagias, Z. Wang, M. E. Birkbak, E. Lauridsen, M. Abis, G. Lovric, K. Jefimovs, M. Stampanoni, “Diffractive small angle X-ray scattering imaging for anisotropic structures,” Nature Communications 10 (2019) 5130. DOI: 10.1038/s41467-019-12635-2 DORA

M. Kagias, Z. Wang, V. Guzenko, C. David, M. Stampanoni, K. Jefimovs, “Fabrication of Au gratings by seedless electroplating for X-ray grating interferometry,” Mat. Sci. Semicon. Proc. 92 (2019) 73-79. DOI: 10.1016/j.mssp.2018.04.015 DORA

J. Vila-Comamala, L. Romano, V. Guzenko, M. Kagias, M. Stampanoni, K. Jefimovs, “Toawards sub-micrometer high aspect ratio X-ray gratings by atomic layer deposition of iridium,” Microelectron. Eng. 192 (2018) 19-24. DOI: 10.1016/j.mee.2018.01.027 DORA

L. Romano, J. Vila-Comamala, H. Schift, M. Stampanoni, K. Jefimovs, “Hot embossing of Au- and Pb-based alloys for x-ray grating fabrication,” J. Vac. Sci. Technol. 35 (6) (2017) 06G302. DOI: 10.1116/1.4991807 DORA

L. Romano, J. Vila-Comamala, M. Kagias, K. Vogelsang, H. Schift, M. Stampanoni, K. Jefimovs,” High aspect ratio metal microcasting by hot embossing for X-ray optics fabrication,” Microelectron. Eng. 176 (2017) 6-10. DOI: 10.1016/j.mee.2016.12.032 DORA

M. Kagias, Z. Wang, K. Jefimovs, M. Stampanoni, “Dual phase grating interferometer for tunable dark-field sensitivity,” Appl. Phys. Lett. 110 (2017) 014105. DOI: 10.1063/1.4973520 DORA

K. Jefimovs, L. Romano, J. Vila-Comamala, M. Kagias, Z. Wang, L. Wang, C. Dais, H. Solak, M. Stampanoni, “High aspect ratio silicon structures by Displacement Talbot lithography and Bosch etching,” Proc. of SPIE 10146 (2017) 101460L. DOI: 10.1117/12.2258007 DORA