Journal
OPTICS EXPRESS
Volume 23, Issue 11, Pages 14913-14921Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.23.014913
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Funding
- Danish Council for Independent Research through FTP project [0602-01885B]
- Villum Fonden via the VKR Center of Excellence NATEC
- Villum Fonden [00008692] Funding Source: researchfish
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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. (C) 2015 Optical Society of America
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