A highly efficient directional molecular white-light emitter driven by a continuous-wave laser diode.
Tailored light sources have greatly advanced technological and scientific progress by optimizing the emission spectrum or color and the emission characteristics. We demonstrate an efficient spectrally broadband and highly directional warm-white-light emitter based on a nonlinear process driven by a cheap, low-power continuous-wave infrared laser diode. The nonlinear medium is a specially designed amorphous material composed of symmetry-free, diamondoid-like cluster molecules that are readily obtained from ubiquitous resources. The visible part of the spectrum resembles the color of a tungsten-halogen lamp at 2900 kelvin while retaining the superior beam divergence of the driving laser. This approach of functionalizing energy-efficient state-of-the-art semiconductor lasers enables a technology complementary to light-emitting diodes for replacing incandescent white-light emitters in high-brilliance applications.
Fachbereich Physik, Philipps-Universität Marburg, DE-35032 Marburg, Germany. Wissenschaftliches Zentrum für Materialwissenschaften, Philipps-Universität Marburg, DE-35032 Marburg, Germany.
Nils W
NW
Rosemann
Wissenschaftliches Zentrum für Materialwissenschaften, Philipps-Universität Marburg, DE-35032 Marburg, Germany. Fachbereich Chemie, Philipps-Universität Marburg, DE-35032 Marburg, Germany.
Jens P
JP
Eußner
Fachbereich Physik, Philipps-Universität Marburg, DE-35032 Marburg, Germany. Wissenschaftliches Zentrum für Materialwissenschaften, Philipps-Universität Marburg, DE-35032 Marburg, Germany.
Andreas
A
Beyer
Fachbereich Physik, Philipps-Universität Marburg, DE-35032 Marburg, Germany. Wissenschaftliches Zentrum für Materialwissenschaften, Philipps-Universität Marburg, DE-35032 Marburg, Germany.
Stephan W
SW
Koch
Fachbereich Physik, Philipps-Universität Marburg, DE-35032 Marburg, Germany. Wissenschaftliches Zentrum für Materialwissenschaften, Philipps-Universität Marburg, DE-35032 Marburg, Germany.
Kerstin
K
Volz
Wissenschaftliches Zentrum für Materialwissenschaften, Philipps-Universität Marburg, DE-35032 Marburg, Germany. Fachbereich Chemie, Philipps-Universität Marburg, DE-35032 Marburg, Germany. stefanie.dehnen@uni-marburg.de sangam.chatterjee@physik.uni-giessen.de.
Stefanie
S
Dehnen
Fachbereich Physik, Philipps-Universität Marburg, DE-35032 Marburg, Germany. Wissenschaftliches Zentrum für Materialwissenschaften, Philipps-Universität Marburg, DE-35032 Marburg, Germany. Institute of Experimental Physics I, Justus-Liebig-University, DE-35392 Giessen, Germany. stefanie.dehnen@uni-marburg.de sangam.chatterjee@physik.uni-giessen.de.
Sangam
S
Chatterjee