{'fraction_non_alphanumeric': 0.034378159757330634, 'fraction_numerical': 0.024266936299292215, 'mean_word_length': 5.387096774193548, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Experimental Demonstration of Horizontal Nanoplasmonic Slot Waveguide-Ring Resonators With Submicrometer Radius

Ultracompact plasmonic waveguide-ring resonators (WRRs) based on horizontal Cu/SiO2/Si/SiO2/Cu nanoplasmonic slot waveguides are fabricated using standard Si complementary metal-oxide-semiconductor (CMOS) technology for operation at telecommunication wavelengths. Efficient coupling between the ring and bus waveguides is achieved through a small aperture in the metallic sidewalls of the waveguides. A WRR with a radius 0.91 μm (cavity mode volume of ~0.145 μm3 ) is characterized, exhibiting an insertion loss of ~2.4 dB, an extinction ratio of ~28 dB at the 1596-nm resonance (corresponding to the seventh cavity mode), a free-spectral range of ~143 nm, and a quality factor of ~638. The demonstrated WRR can be used as a building block for various functional nanoplasmonic devices to be seamlessly integrated in the existing Si photonic and electronic integrated circuits.