Ultrafast Dynamics in Nanoscale Systems

Group Leader: Klaas-Jan Tielrooij

News

Quantum materials enable next-generation photonics for mobile networks in the terahertz regime

A paper recently published in 'Light: Science & Applications’ demonstrates that quantum materials of the topological insulator family can efficiently upconvert electromagnetic radiation in the terahertz (THz) regime. These results open new avenues for THz photonics technology and its application in sensing, homeland security and sixth-generation mobile communications. The study was conducted by a team of researchers coordinated by ICN2 group leader Dr Klaas-Jan Tielrooij.



A study on ultrafast light-based logic in graphene discussed by Dr. Tielrooij in ‘Nature Materials’

ICN2 group leader Dr Klaas-Jan Tielrooij is the author of a perspective article in the “News & Views” section of the latest issue of “Nature Materials” that summarizes and highlights the relevance of a study recently published in “Nature”. This work provides a proof-of-concept demonstration of an ultrafast logic gate, using graphene and short laser pulses, which has incredibly promising applications in ultrafast signal processing. 


Severo Ochoa Workshop on Ultrafast Physics

Organised and chaired by Dr Klaas-Jan Tielrooij, the event’s purpose was not only to present some of the latest trends in ultrafast physics but also to discuss the usefulness of ultrafast measurements in other research fields.



Controlling how fast graphene cools down

An international study, published in ACS Nano, has demonstrated an unprecedented level of control of the optical properties of graphene. The work has promising applications in different technological fields ranging from photonics to telecommunications.



Thin is cool: researchers unveil the excellent heat dissipation properties of layered semiconductors down to the monolayer

A study published in “Advanced Materials” reveals the thermal transport properties of ultrathin crystals of molybdenum diselenide, a two-dimensional material of the transition metal dichalcogenide (TMD) family. Outperforming silicon, TMD materials prove to be outstanding candidates for electronic and optoelectronic applications, such as flexible and wearable devices. This research, which involved researchers belonging to four ICN2 groups and from ICFO (Barcelona), Utrecht University (the Netherlands), the University of Liège (Belgium) and the Weizmann Institute of Science (Israel), was coordinated by ICN2 group leader Dr Klaas-Jan Tielrooij.


The new Quantum International Conference series launched in Bilbao

Experts in quantum science and technology coming from academy and industry met in Bilbao on the occasion of Quantum 2021, a three-day event meant to become the first of a new series of international conferences dedicated to this emerging and promising field of research. The ICN2 is among the organizers.




Not all 2D materials are as strong as graphene: Transition Metal Dichalcogenides get weaker when thickness decreases

A new study recently published in "Advanced Materials" reveals that MoSe2, a prominent material of the transition metal dichalcogenides (TMDs) family, loses relative stiffness when its thickness is reduced. This work was carried out by researchers from the Adam Mickiewicz University (AMU) in Poznan (Poland) and the ICN2, under the coordination of Dr Bartlomiej Graczykowski and Dr Klaas-Jan Tielrooij, respectively.




Defects to the rescue: Exploiting defects at Van der Waals interfaces between layered materials

A paper recently published in the journal “Science Advances” demonstrates that defects in van der Waals materials, normally detrimental for device applications, can be exploited to capture and store charge carriers and therefore be beneficial for practical applications, such as photodetectors. Dr Klaas-Jan Tielrooij, leader of the Ultrafast Dynamics in Nanoscale Systems group at the ICN2, participated in this study.


Graphene-based hybrid material enables efficient light conversion of invisible light

Researchers from various institutes in Barcelona and Germany have demonstrated that a hybrid material consisting of a monolayer of graphene and a metallic grating structure is an excellent candidate for relevant commercial applications in which efficient nonlinear conversion of (invisible) terahertz light is required. This work has just been published in ACSNano, in a paper with Dr Klaas-Jan Tielrooij, leader of the ICN2 Ultrafast Dynamics in Nanoscale Systems group, as last author. Metal grating combined with graphene opens up the road to terahertz nonlinear photonic applications. 


Fast electrical modulation of nanoscale erbium-graphene systems towards quantum technology applications

A research recently published in Nature Communications shows that a nanolayer of erbium light emitters combined with monolayer graphene exhibits extremely strong near-field interactions, whose strength can be modulated orders of magnitude faster than the natural decay rate of the erbium emitters. This hybrid erbium-graphene material platform opens up exciting possibilities, including manipulation of quantum states. This study has been carried out by a team of scientists that includes ICN2 Junior Group Leader Dr Klaas-Jan Tielrooij, and colleagues from ICFO in Barcelona and IRCP in Paris.


BIST supports multidisciplinary research through the BIST Ignite Programme and Awards

The awarded projects are BIOVAC (ICN2 / IBEC), which aims to develop a new generation of vaccines against untreatable infections and multi-resistant bacteria, and BIOSPAD (ICFO / IFAE), which will develop more affordable brain diagnostic tests. ICN2 is involved in 4 of the 5 projects selected in the 2020 Ignite Programme, leading one of them (SensMOF) through Dr Leyre Gómez Navascués.



Research meets industry at the Graphene 2019 Conference

Starting this morning in Rome, this edition of the Graphene Conference series (June 25-28) will bring together experts on graphene and 2D materials from around Europe, as well as companies interested in exploiting new promising technologies in this field. The ICN2 has a leading role in creating new graphene-based scientific and industrial opportunities. Visit the BIST booth we share with our colleagues from ICFO and IFAE!




The ICN2 celebrates the first Severo Ochoa ICT Workshop: Lavoisier discussion on “Quantum Simulation”

The event, held on 8-9 May, is the first of a series of workshops offering an overview of the different research areas covered by the ICN2 Severo Ochoa Strategic Plan. It was focused on ultrafast dynamics and organised in collaboration with the European centre of excellence MaX, GRR-I Graphene&Co and GDR Graphene&Co. ICREA Prof. Stephan Roche, Group Leader of the ICN2 Theoretical and Computational Nanoscience Group, was the local coordinator of the event.


Graphene enables a new technology for detecting terahertz radiation

A recent study in Nano Letters depicts a device that overcomes the several disadvantages related to current terahertz detectors. ICN2 Junior Group Leader Dr Klaas-Jan Tielrooij, who was involved in this work while still performing his research at ICFO, is one of the corresponding authors.


Dr Klaas-Jan Tielrooij joins the ICN2 with an ERC Starting Grant

This researcher combines the study of fundamental physics with applied research, exploring ultrafast dynamics in nanoscale systems and their application in the fields of photodetection, quantum technologies and telecommunications. Building on close collaborations via inter-institutional projects within BIST, he will join the ICN2 in October as junior group leader, complete with his recently awarded ERC Starting Grant.


BIST reveals the five Ignite seed projects for 2018

Today the Barcelona Institute of Science and Technology (BIST) announce the five projects that will receive seed funding under the 2018 edition of its Ignite programme to accelerate multidisciplinary research at its member institutes.