Journal
APPLIED OPTICS
Volume 60, Issue 13, Pages 3559-3568Publisher
OPTICAL SOC AMER
DOI: 10.1364/AO.418358
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Funding
- National Natural Science Foundation of China [61961146003]
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico [403031/2019-2]
- Science and Engineering Research Board [ECR/2016/001350]
- IITR-FIG
- Department of Science and Technology, Ministry of Science and Technology, India [DST/ICD/BRICS/Pilot Call 3/ERSPIC/2019]
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A 1 x 2 tunable switch using a GST embedded silicon microring resonator was proposed and analyzed, exhibiting high extinction ratios and wavelength tunability, making it an attractive option for photonic device applications.
Phase change material Ge2Sb2Te5 (GST) has recently emerged as a highly promising candidate for photonic device applications owing to its high optical contrast, self-holding bi-stability, and fast material response. Here, we propose and analyze a 1 x 2 tunable switch using a GST embedded silicon microring resonator exploiting high optical contrast during GST phase change and a high thermo-optic coefficient of amorphous phase GST. Our device exhibits high extinction ratios of 25.57 dB and 18.75 dB at through and drop ports, respectively, with just a 1 mu m long GST layer. The two states of the switch are realizable by electrically inducing phase change in GST. For post phase change fromamorphous to crystalline and vice versa, the fall time down the 80% of phase transition temperature is similar to 66 ns and similar to 45 ns, respectively. The resonance wavelength shift per unit active length is 0.661 nm/mu m, and the tuning efficiency is 1.16nm/mW. The large wavelength tunability (4.63 nm) of the proposed switch makes it an attractive option for reconfigurable photonic integrated circuits. (C) 2021 Optical Society of America.
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