1. Department of Physics, Faculty of Mathematics and Natural Sciences, Universitas Gadjah Mada, Sekip Utara, BLS 21, Yogyakarta 55281, Indonesia
2. Research Center for Nanotechnology Systems, National Research and Innovation Agency, Building 440-442, KST B.J. Habibie, Tangerang Selatan 15314, Indonesia
3. Department of Physics Education, Faculty of Mathematics and Natural Sciences, Universitas Negeri Yogyakarta, Karangmalang, Yogyakarta 55281, Indonesia