Aashutosh Kumar, Asa Asadollahbaik, Jeongmo Kim, Khalid Lahlil, Simon Thiele, Alois M. Herkommer, Síle Nic Chormaic, Jongwook Kim, Thierry Gacoin, Harald Giessen, Jochen Fick. Emission spectroscopy of NaYF4:Eu nanorods optically trapped by Fresnel lens fibers[J]. Photonics Research, 2022, 10(2): 332