title: High resolution on-chip spectroscopy based on miniaturized microdonut resonators.
abstract: We experimentally demonstrate a high resolution integrated spectrometer on silicon on insulator (SOI) substrate using a large-scale array of microdonut resonators. Through top-view imaging and processing, the measured spectral response of the spectrometer shows a linewidth of ~0.6 nm with an operating bandwidth of ~50 nm. This high resolution and bandwidth is achieved in a compact size using miniaturized microdonut resonators (radius ~2 μm) with a high quality factor, single-mode operation, and a large free spectral range. The microspectrometer is realized using silicon process compatible fabrication and has a great potential as a high-resolution, large dynamic range, light-weight, compact, high-speed, and versatile microspectrometer.
authors.affiliation: School of Electrical and Computer Engineering, Georgia Institute of Technology, 777 Atlantic Drive NW, Atlanta, Georgia 30332, USA.
authors.forename: Zhixuan
authors.initials: Z
authors.lastname: Xia
authors.forename: Ali Asghar
authors.initials: AA
authors.lastname: Eftekhar
authors.forename: Mohammad
authors.initials: M
authors.lastname: Soltani
authors.forename: Babak
authors.initials: B
authors.lastname: Momeni
authors.forename: Qing
authors.initials: Q
authors.lastname: Li
authors.forename: Maysamreza
authors.initials: M
authors.lastname: Chamanzar
authors.forename: Siva
authors.initials: S
authors.lastname: Yegnanarayanan
authors.forename: Ali
authors.initials: A
authors.lastname: Adibi
mesh_terms: D004867:Equipment Design; D008855:Microscopy, Electron, Scanning; D015591:Microspectrophotometry / Q000295:instrumentation* / Q000379:methods*; D008904:Miniaturization / Q000379:methods; D055096:Optical Devices; D055095:Optics and Photonics / Q000295:instrumentation* / Q000379:methods*; D012825:Silicon / Q000737:chemistry
chemical_list: D012825:Silicon