1. Photonics Institute, TU Wien, Vienna, Austria.
2. Department of Physics, ETH Zurich, Zurich, Switzerland.
3. Istituto di Fotonica e Nanotecnologie-CNR, Piazza Leonardo da Vinci 32, 20133 Milano, Italy.
4. Light Conversion Ltd., Vilnius, Lithuania.
5. Dipartimento di Fisica, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milano, Italy.
6. Center for Physical Sciences & Technology, Savanoriu Ave. 231 LT-02300, Vilnius, Lithuania.