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Athermal Wavelength Characteristics of Si Slot Ring Resonator Embedded with Benzocyclobutene for Optoelectronic Integrated Circuits

2010; Institute of Physics; Volume: 49; Issue: 5R Linguagem: Inglês

10.1143/jjap.49.050206

1347-4065

Yuki Atsumi, Keita Inoue, Nobuhiko Nishiyama, Shigehisa Arai,

Semiconductor Lasers and Optical Devices

An athermal Si-slot-waveguide ring resonator embedded with benzocyclobutene (BCB), a low- k material used in electronics, was proposed. By controlling the width of the BCB-filled gap to 90 nm, the temperature coefficient of equivalent index of a Si slot waveguide could be reduced to 3.70×10 -6 , which is two orders of magnitude smaller than that of a conventional Si waveguide. The dependences of peak wavelength shift on temperature in the fabricated devices of a conventional Si wire waveguide with SiO 2 cladding, Si wire waveguide with BCB cladding, and Si slot waveguide with BCB cladding were 26, 17, and -0.6 pm/K, respectively.