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Université de Fribourg

Total Angular Momentum Dichroism of the Terahertz Vortex Beams at the Antiferromagnetic Resonances

Sirenko, Andrei A. ; Marsik, Premysl ; Bugnon, Laurent ; Soulier, Mathias ; Bernhard, Christian ; Stanislavchuk, T. N. ; Xu, Xianghan ; Cheong, S.-W.

In: Physical Review Letters, 2021, vol. 126, no. 15, p. 157401

Terahertz vortex beams with different superposition of the orbital angular momentum $l={\pm}1$, ${\pm}2$, ${\pm}3$, and ${\pm}4$ and spin angular momentum ${\sigma}={\pm}1$ were used to study antiferromagnetic (AFM) resonances in TbFe$_3$(BO$_3$)$_4$ and Ni$_3$TeO$_6$ single crystals. In both materials we observed a strong vortex beam dichroism for the AFM resonances that are split in ...

Università della Svizzera italiana

Higher-order connections between stereotyped subsets : implications for improved patient classification in CLL

Agathangelidis, Andreas ; Chatzidimitriou, Anastasia ; Gemenetzi, Katerina ; Giudicelli, Veronique ; Karypidou, Maria ; Plevova, Karla ; Davis, Zadie ; Yan, Xiao-Jie ; Jeromin, Sabine ; Schneider, Christof ; Bredo-Pedersen, Lone ; Tschumper, Renee C. ; Sutton, Lesley-Ann ; Baliakas, Panagiotis ; Scarfò, Lydia ; van Gastel, Ellen J. ; Armand, Marine ; Tausch, Eugen ; Biderman, Bella ; Baer, Constance ; Bagnara, Davide ; Navarro, Alba ; Langlois de Septenville, Anne ; Guido, Valentina ; Mitterbauer-Hohendanner, Gerlinde ; Dimovski, Aleksandar ; Brieghel, Christian ; Lawless, Sarah ; Meggendorfer, Manja ; Braazdilova, Kamila ; Ritgen, Matthias ; Facco, Monica ; Tresoldi, Cristina ; Visentin, Andrea ; Patriarca, Andrea ; Catherwood, Mark ; Bonello, Lisa ; Sudarikov, Andrey ; Vanura, Katrina ; Roumelioti, Maria ; Skuhrova-Francova, Hana ; Moysiadis, Theodoros ; Veronese, Silvio ; Giannopoulos, Krzysztof ; Mansouri, Larry ; Karan-Djurasevic, Teodora ; Sandaltzopoulos, Raphael ; Bödör, Csaba ; Fais, Franco ; Kater, Arnon ; Panovska, Irina ; Rossi, Davide ; Alshemmari, Salem ; Panagiotidis, Panagiotis ; Costeas, Paul ; Espinet Solà, Blanca ; Antic, Darko ; Foroni, Letizia ; Montillo, Marco ; Trentin, Livio ; Stavroyianni, Niki ; Gaidano, Gianluca ; Francia di Celle, Paola ; Niemann, Carsten ; Campo, Elias ; Anagnostopoulos, Achilles ; Pott, Christiane ; Fischer, Kirsten ; Hallek, Michael ; Oscier, David ; Stilgenbauer, Stephan ; Haferlach, Claudia ; Jelinek, Diane ; Chiorazzi, Nicholas ; Pospisilova, Sarka ; Lefranc, Marie-Paule ; Kossida, Sofia ; Langerak, Anton W. ; Belessi, Chrysoula ; Davi, Frederic ; Rosenquist, Richard ; Ghia, Paolo ; Stamatopoulos, Kostas

In: Blood, 2020, vol. 137, no. 10, p. 1365–1376

Chronic lymphocytic leukemia (CLL) is characterized by the existence of subsets of patients with (quasi)identical, stereotyped B cell receptor immunoglobulins (BcR IG). Patients in certain major stereotyped subsets often display remarkably consistent clinicobiological profiles, suggesting that the study of BcR IG stereotypy in CLL has important implications for understanding disease...

Université de Fribourg

Poly(ADP-ribose) polymerase inhibition: past, present and future

Curtin, Nicola J. ; Szabo, Csaba

In: Nature Reviews Drug Discovery, 2020, vol. 19, no. 10, p. 711–736

The process of poly(ADP-ribosyl)ation and the major enzyme that catalyses this reaction, poly(ADP-ribose) polymerase 1 (PARP1), were discovered more than 50 years ago. Since then, advances in our understanding of the roles of PARP1 in cellular processes such as DNA repair, gene transcription and cell death have allowed the investigation of therapeutic PARP inhibition for a variety of diseases...

Université de Fribourg

Altering the temporal regulation of one transcription factor drives evolutionary trade-offs between head sensory organs

Ramaekers, Ariane ; Claeys, Annelies ; Kapun, Martin ; Mouchel-Vielh, Emmanuèle ; Potier, Delphine ; Weinberger, Simon ; Grillenzoni, Nicola ; Dardalhon-Cuménal, Delphine ; Yan, Jiekun ; Wolf, Reinhard ; Flatt, Thomas ; Buchner, Erich ; Hassan, Bassem A.

In: Developmental Cell, 2019, vol. 50, no. 6, p. 780-792.e7

Size trade-offs of visual versus olfactory organs is a pervasive feature of animal evolution. This could result from genetic or functional constraints. We demonstrate that head sensory organ size trade-offs in Drosophila are genetically encoded and arise through differential subdivision of the head primordium into visual versus non- visual fields. We discover that changes in the temporal...

Université de Fribourg

Terahertz vortex beam as a spectroscopic probe of magnetic excitations

Sirenko, Andrei A. ; Maršík, Premysl ; Bernhard, Christian ; Stanislavchuk, T. N. ; Kiryukhin, V. ; Cheong, S.-W.

In: Physical Review Letters, 2019, vol. 122, no. 23, p. 237401

Circularly polarized light with spin angular momentum is one of the most valuable probes of magnetism. We demonstrate that light beams with orbital angular momentum (OAM), or vortex beams, can also couple to magnetism exhibiting dichroisms in a magnetized medium. Resonant optical absorption in a ferrimagnetic crystal depends strongly on both the handedness of the vortex and the direction of...