Supplementary Information Experimental imaging properties of immersion microscale spherical lenses Ran Ye,1 Yong-Hong Ye,1,* Hui Feng Ma, 2 Lingling Cao, 1 Jun Ma,3 Frank Wyrowski, 4 Rui Shi,4 and Jia-Yu Zhang5 1 Jiangsu Provincial Key Laboratory of Optoelectronic Technology, Department of Physics, Nanjing Normal University, Nanjing 210097, China 2 State Kay Laboratory of Millimeter Waves, Southeast University, Nanjing 210096, China 3 School of Electronic and Optical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China 4 Institute of Applied Physics, Friedrich-Schiller-University Jena, Max-Wien-Platz 1, 07743 Jena, Germany 5 Department of Electronic Engineering, Southeast University, Nanjing 210096, China *Corresponding author: yeyonghong@njnu.edu.cn 1 2 3 4 Captions: Supplementary Figure S1 Optical images of a semi-immersed microscale lens on a large object. The lens is semi-immersed in the index-matching oil, and the distance d between the lens and the object is about 3.1 μm. A virtual image (1.38×, s1-1) and a real image (-1.80×, s1-2) are formed. The large object is fabricated with the 960 nm microspheres. The results are similar to the case when the lens is semi-immersed in the SU-8 resist. The scale bar is 2 μm. Supplementary Figure S2 Optical images of a semi-immersed microscale lens on a random object. The lens is semi-immersed in the SU-8 resist, and the object is fabricated with the 960 nm microspheres which are randomly packed. The distance d between the lens and the object is about 3.1 μm. A virtual image (1.50×, s2-1) and a real image (-1.85×, s2-2) are formed. The results are similar to the case when the microspheres are hexagonally close-packed. The scale bar is 2 μm. Supplementary Figure S3 Focal length of a microscale lens. (a) (a and b) The lens is not semi-immersed in the SU-8 resist. (a) Simulated by CST. (b) Simulated by ZEMAX. (c and d) The lens is semi-immersed in the SU-8 resist. (c) Simulated by CST. (d) Simulated by ZEMAX. λ=555 nm. 5