J
Joan J. Carvajal
Researcher at Rovira i Virgili University
Publications - 166
Citations - 2431
Joan J. Carvajal is an academic researcher from Rovira i Virgili University. The author has contributed to research in topics: Laser & Luminescence. The author has an hindex of 21, co-authored 160 publications receiving 2046 citations. Previous affiliations of Joan J. Carvajal include Spanish National Research Council & Stony Brook University.
Papers
More filters
Journal ArticleDOI
Passive mode-locking of a Tm-doped bulk laser near 2 microm using a carbon nanotube saturable absorber.
Won Bae Cho,Andreas Schmidt,Jong Hyuk Yim,Sun Young Choi,Soonil Lee,Fabian Rotermund,Uwe Griebner,Günter Steinmeyer,Valentin Petrov,Xavier Mateos,Maria Cinta Pujol,Joan J. Carvajal,Magdalena Aguiló,Francesc Díaz +13 more
TL;DR: Stable and self-starting mode-locking of a Tm:KLu(WO(4))(2) crystal laser is demonstrated using a transmission-type single-walled carbon nanotube (SWCNT) based saturable absorber (SA) using the E11 transition of the SWCNTs for nonlinear saturable absorption.
Journal ArticleDOI
Benefits of Silica Core-Shell Structures on the Temperature Sensing Properties of Er,Yb:GdVO4 Up-Conversion Nanoparticles
TL;DR: It is observed that the silica coating shell prevents progressive heating of the nanoparticles during prolonged excitation periods with the 980 nm laser, preventing effects on their thermometric applications.
Journal ArticleDOI
Upconversion thermometry: a new tool to measure the thermal resistance of nanoparticles.
O. A. Savchuk,Joan J. Carvajal,Carlos D. S. Brites,Luís D. Carlos,Magdalena Aguiló,Francesc Díaz +5 more
TL;DR: This work demonstrated that KLu(WO4)2:Ho3+,Tm3+ nanoparticles are able to combine controllable heat release and upconversion thermometry permitting to estimate its thermal resistance (in air), a key parameter to model the heat transfer at the nanoscale.
Journal ArticleDOI
Er:Yb:NaY2F5O up-converting nanoparticles for sub-tissue fluorescence lifetime thermal sensing
Ol. A. Savchuk,Patricia Haro-González,Joan J. Carvajal,Daniel Jaque,Jaume Massons,Magdalena Aguiló,Francesc Díaz +6 more
TL;DR: The potential use of Er:Yb:NaY2F5O nanoparticles as lifetime based thermal probes is reported, providing the first experimental evidence on sub-tissue lifetime fluorescence thermal sensing by using up-conversion nanoparticles in an ex vivo experiment.
Journal ArticleDOI
Ho,Yb:KLu(WO4)2 Nanoparticles: A Versatile Material for Multiple Thermal Sensing Purposes by Luminescent Thermometry
O. A. Savchuk,Joan J. Carvajal,M. Cinta Pujol,E. William Barrera,Jaume Massons,Magdalena Aguiló,Francesc Díaz +6 more
TL;DR: In this paper, the temperature dependence of the up-conversion emission in the green and red regions of the electromagnetic spectrum of Ho,Yb:KLu(WO4)2 nanocrystals after excitation at 980 nm was studied.