Quan, QiminLoncar, Marko2019-10-032011Quan, Qimin, and Marko Loncar. 2011. “Deterministic Design of Wavelength Scale, Ultra-High Q Photonic Crystal Nanobeam Cavities.” Optics Express 19 (19): 18529. https://doi.org/10.1364/oe.19.018529.1094-4087http://nrs.harvard.edu/urn-3:HUL.InstRepos:41461256Photonic crystal nanobeam cavities are versatile platforms of interest for optical communications, optomechanics, optofluidics, cavity QED, etc. In a previous work [Appl. Phys. Lett. 96, 203102 (2010)], we proposed a deterministic method to achieve ultrahigh Q cavities. This follow-up work provides systematic analysis and verifications of the deterministic design recipe and further extends the discussion to air-mode cavities. We demonstrate designs of dielectric-mode and air-mode cavities with Q > 10(9), as well as dielectric-mode nanobeam cavities with both ultrahigh-Q (> 10(7)) and ultrahigh on-resonance transmissions (T > 95%).en-USJournal Article2019-10-0310.1364/OE.19.018529