Ultracompact resonator with high quality-factor based on a hybrid grating structure

Alireza Taghizadeh, Jesper Mørk, Il-Sug Chung

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    We numerically investigate the properties of a hybrid grating structure acting as a resonator with ultrahigh quality factor. This reveals that the physical mechanism responsible for the resonance is quite different from the conventional guided mode resonance (GMR). The hybrid grating consists of a subwavelength grating layer and an un-patterned high-refractive-index cap layer, being surrounded by low index materials. Since the cap layer may include a gain region, an ultracompact laser can be realized based on the hybrid grating resonator, featuring many advantages over high-contrast-grating resonator lasers. The effect of fabrication errors and finite size of the structure is investigated to understand the feasibility of fabricating the proposed resonator.
    Original languageEnglish
    JournalOptics Express
    Issue number10
    Pages (from-to)14913-14921
    Number of pages9
    Publication statusPublished - 2015


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