ArticleAuthors: Le, Duy Tien; Do, The Duong; Nguyen, Van Khoi; Nguyen, Anh Tuan; Le, Trung Thanh (2017)
We propose a method for generating the tunable Fano resonance line
sharp by using only one 4x4 multimode interference (MMI) coupler.
We show that our new device structure acting an interferometer and
we employ a microring resonator and phase shifter to control the
shape. The analytical analysis and FDTD simulations have been used
for the first order design. The device has advantages of compactness,
high tolerance fabrication and ease of fabrication on the same chip. 
