Single-Crystal Silicon Optical Fiber by Direct Laser Crystallization

• DOI: 10.1021/acsphotonics.6b00584
• Publication Date: 2016-12-05T18:46:56Z
• Authors: Xiaoyu Ji; Shiming Lei; Shih-Ying Yu; Hiu Yan Cheng; Wenjun Liu; Nicolas Poilvert; Yihuang Xiong; Ismaila Dabo; Suzanne E. Mohney; John V. Badding; Venkatraman Gopalan
• Keywords: Cladding (metalworking); Hybrid silicon laser

Semiconductor core optical fibers with a silica cladding are of great interest in nonlinear photonics and optoelectronics applications. Laser crystallization has been recently demonstrated for crystallizing amorphous silicon into crystalline form. Here we explore the underlying mechanism by which long single-crystal fibers, novel platforms photonics, can be achieved this process. Using finite element modeling, construct laser processing diagram that reveals parameter space within single crystals grown. Utilizing diagram, illustrate creation deposited inside capillary high-pressure chemical vapor deposition. The up to 5.1 mm long, have very well-defined core/cladding interface chemically pure leads low losses down ∼0.47–1 dB/cm at standard telecommunication wavelength (1550 nm). It also exhibits photosensitivity is comparable bulk silicon. Creating such diagrams provide general framework developing other materials technological importance.