Title :
Asymmetric microstructures for high light extraction and light pattern modulation
Author :
Jae-Jun Kim ; Dongmin Keum ; Ki-Hun Jeong
Author_Institution :
Korea Adv. Inst. of Sci. & Technol., Daejeon, South Korea
Abstract :
This work presents a novel method of fabricating asymmetric microstructures for light extraction enhancement and light pattern modulation. Asymmetric microstructures were fabricated at wafer level by two-step photolithography, surface energy modulation, and thermal reflow. The microstructures improve light extraction efficiency by suppressing total internal reflection and modulate far-field light distribution by changing incident angle of light. Light extraction and light pattern can be changed by design of asymmetric microstructures. These structures can be utilized for display and lighting applications.
Keywords :
micro-optics; optical design techniques; optical modulation; photolithography; surface energy; asymmetric microstructure; far-field light distribution; high light extraction; light pattern modulation; optical design; surface energy modulation; thermal reflow; total internal reflection; two-step photolithography; wafer level; Lenses; Light emitting diodes; Lighting; Lithography; Microstructure; Modulation; Reflection;
Conference_Titel :
Optical MEMS and Nanophotonics (OMN), 2013 International Conference on
Conference_Location :
Kanazawa
Print_ISBN :
978-1-4799-1512-5
DOI :
10.1109/OMN.2013.6659045