1. College of Physics and Optoelectronic Engineering Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province Shenzhen University Shenzhen 518060 China
2. Laboratory of Photonics and Interfaces (LPI) Department of Chemistry and Chemical Engineering École Polytechnique Fédérale de Lausanne Lausanne CH-1015 Switzerland
3. Department of Metallurgical and Materials Engineering Karamanoglu Mehmetbey University Karaman 70100 Turkey