Complex spatial light modulation capability of a dual layer in-plane switching liquid crystal panel
Seong-Woo Jang, Wonwoo Choi, Soobin Kim, Jonghyun Lee, Sehwan Na, Sangwon Ham, Juseong Park, Hoon Kang, Byeong‐Kwon Ju, Hwi Kim
Abstract
Complex spatial light modulator (SLM), which can simultaneously control the amplitude and phase of light waves, is a key technology for wide-range of wave-optic technologies including holographic three-dimensional displays. This paper presents a flat panel complex spatial light modulator that consists of dual in-plane switching liquid crystal panels with double-degrees of freedom of voltage inputs. The proposed architecture features single-pixel level complex light modulation enabling complex light modulation in entire free space, which is most contrast to conventional macro-pixel based complex modulation techniques. Its complex light modulation capability is verified with theoretical simulation and experimental characterization, and a three-dimensional holographic image reconstruction without conjugate noise. It is believed that the proposed flat panel complex SLM can be an essential device for a wide range of advanced wave optic technologies.