Journal
OPTICS EXPRESS
Volume 28, Issue 13, Pages 19270-19280Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.395013
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Funding
- National Natural Science Foundation of China [61861136001]
- Science Foundation Ireland [17/NSFC/4918]
- Science Foundation Ireland (SFI) [17/NSFC/4918] Funding Source: Science Foundation Ireland (SFI)
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Single-crystal aluminum nitride (AlN) possessing both strong Pockels and Kerr nonlinear optical effects as well as a very large band gap is a fascinating optical platform for integrated nonlinear optics. In this work, fully etched AlN-on-sapphire microresonators with a high-Q of 2.1 x 10(6) for the TE00 mode are firstly demonstrated with the standard photolithography technique. A near octave-spanning Kerr frequency comb ranging from 1100 to 2150 nm is generated at an on-chip power of 406 mW for the TM00 mode. Due to the high confinement, the TE10 mode also excites a Kerr comb from 1270 to 1850nm at 316 mW. In addition, frequency conversion to visible light is observed during the frequency comb generation. Our work will lead to a large-scale, low-cost, integrated nonlinear platform based on AlN. (C) 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
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