Simultaneously Emitting Device of Orthogonal Circular Polarization (IMAGE)

Light Publishing Center, Changchun Institute of Optics, Fine Mechanics And Physics, CAS

Simultaneously Emitting Device of Orthogonal Circular Polarization

Caption

a, schematic diagrams of the fabrication process of the circular polarization-emitting device (i, the 1st rubbing of AL22636 coated on CuPc. ii, spin coating and drying of F8BT layer and iii, rubbing the F8BT (2nd rubbing) with different direction from the 1st rubbing. iv, coating optical adhesion (NOA) on the rubbed F8BT and v, thermal annealing the sample at liquid crystalline temperature of the F8BT. vi, cooling down the sample and peeling off NOA and vii, TPBi/LiF/Al deposition in vacuum, sequentially. An AFM image and the corresponding Fourier transformed image show the 2nd rubbed surface of the F8BT. Here, scale bar represents 5 ?m and arrows are indicating the rubbing directions). b, schematic diagram of the simultaneous emission with orthogonal handedness in circular polarization from single emitting layer. The multi-directionally rubbed AL22636 surface and the uni-directionally rubbed F8BT surface produce the reverse twisted structures. c, microscopic textures and d, PL textures under LH (top image) and RH (bottom image) circular polarizers. e, the CPEL spectra for the 1st (top spectra) and 2nd (bottom spectra) quadrants in the sample as in c. All spectra measured without a circular polarizer, and with LH and RH circular polarizers are presented by black (IT), red (IL), and blue (IR) solid lines, respectively.

Credit

by Kyungmin Baek, Dong-Myung Lee, Yu-Jin Lee, Hyunchul Choi, Jeongdae Seo, Inbyeong Kang, Chang-Jae Yu, and Jae-Hoon Kim

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