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Site-controlled single Ge quantum dot was grown on patterned silicon-on-insulator substrate. The single dot was then precisely embedded into a photonic crystal microcavity. Resonant photoluminescence was observed from the single Ge dot in the cavity.
Typical L-type photonic crystal (PC) microcavities have a dynamic range of approximately 3–4 orders of magnitude in biosensing. We experimentally demonstrated that multiplexing of PC sensors with different geometry can achieve a wide dynamic range covering 6 orders of magnitude with potential for 8 or more orders with suitable optimization.
We for the first time demonstrated a flexible crystalline silicon nanomembrane photonic crystal microcavity, which shows a quality factor of 22000 and could be bent to a radius of 5 mm.
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