Tunable optical reflectance using a monolithic encapsulated grating. (September 2016)

• Record Type: Journal Article
• Authors: Sang, Tian; Chen, Guoqing; Wang, Yueke; Wang, Benxin; Jiang, Wenwen; Zhao, Tianzhuo; Cai, Shaohong
• Is Part Of: Optics & laser technology. Volume 83(2016)
• Page Start: 163
• Page End: 167
• Publication Date: 2016-09
• Subjects: Tunable reflectance -- Guided-mode resonance -- Encapsulated grating; Optics -- Periodicals; Lasers -- Periodicals; Electronic journals; 621.366
• DOI: 10.1016/j.optlastec.2016.04.008
• Languages: English
• ISSNs: 0030-3992

Abstract

Abstract: Tunable optical reflectance using a monolithic encapsulated grating in fused silica is presented based on the guided-mode resonance (GMR) effect. The resonance location can be altered by slightly varying the thickness of the top layer. For small thickness of the grating layer, the variation of the grating thickness can be tailored to create variable optical reflectance at the same operating wavelength with the filter linewidth and the reflection sidebands kept almost the same. By proper choosing the grating thickness, the novel dual functional device that combines functions of narrowband filtering and three-port beam splitting in the resonance domain can be obtained using the monolithic encapsulated grating. Multiline reflection filters can be obtained by increasing the thickness of the top layer, and tunable reflectivity for multiple operating wavelengths can be obtained by changing the grating thickness. Highlights: Tunable optical reflectance using a monolithic encapsulated grating is presented. Tunable reflectivity for single and multiple wavelengths can be obtained. Novel dual functional device of narrowband filtering and beam splitting is proposed.