biostudies-literatureLihachev GUnited States Department of Defense | Defense Advanced Research Projects Agency (DARPA)Swiss National Science FoundationUnited States Department of Defense | Defense Advanced Research Projects AgencyUnited States Department of Defense | United States Air Force | AFMC | Air Force Office of Scientific ResearchUnited States Department of Defense | United States Air Force | AFMC | Air Force Office of Scientific Research (AF Office of Scientific Research)1771https://www.ebi.ac.uk/biostudies/studies/S-EPMC8975808biostudies-literatureUnknown13(1)The past decade has witnessed major advances in the development and system-level applications of photonic integrated microcombs, that are coherent, broadband optical frequency combs with repetition rates in the millimeter-wave to terahertz domain. Most of these advances are based on harnessing of dissipative Kerr solitons (DKS) in microresonators with anomalous group velocity dispersion (GVD). However, microcombs can also be generated with normal GVD using localized structures that are referred to as dark pulses, switching waves or platicons. Compared with DKS microcombs that require specific designs and fabrication techniques for dispersion engineering, platicon microcombs can be readily built using CMOS-compatible platforms such as thin-film (i.e., thickness below 300 nm) silicon nitrideNature communicationsPlaticon microcomb generation using laser self-injection locking.PMC8975808FA9550- 19-1-0250HR0011-20-2-0046176563Liu YLiu JChang LGuo JHe JKippenberg TJWeng WWang RNAnderson MHLihachev GBowers JEfalsePlaticon microcomb generation using laser self-injection locking.The past decade has witnessed major advances in the development and system-level applications of photonic integrated microcombs, that are coherent, broadband optical frequency combs with repetition rates in the millimeter-wave to terahertz domain. Most of these advances are based on harnessing of dissipative Kerr solitons (DKS) in microresonators with anomalous group velocity dispersion (GVD). However, microcombs can also be generated with normal GVD using localized structures that are referred to as dark pulses, switching waves or platicons. Compared with DKS microcombs that require specific designs and fabrication techniques for dispersion engineering, platicon microcombs can be readily built using CMOS-compatible platforms such as thin-film (i.e., thickness below 300 nm) silicon nitride2022-01-01T00:00:00Z2022 Apr2025-04-04T19:41:25.887Z2025-04-04T19:41:25.887ZS-EPMC89758083536564710.1038/s41467-022-29431-0