Fig. 5: Metalens performance comparison against conventional optics.
From: Dual-wavelength metalens enables Epi-fluorescence detection from single molecules
a Set of lenses employed for comparative study with indicated size dimensions: metalens, two single-element aspheric lenses of NA = 0.18 and NA = 0.54, and achromatic objective lenses of NA between 0.15 and 1.2. b Alexa 647 single molecule brightness (CRM) detected by metalens and aspheric lenses. As FCS correlation is not detectable by aspheric lenses, single molecule brightness is considered to equal zero. c Alexa 647 single molecule brightness detected by metalens and achromatic objective lenses. d Alexa 647 molecule diffusion time (τd) detected by metalens and achromatic objective lenses. e Confocal effective volume (Veff) observed by metalens and achromatic objective lenses. Error bars denote standard deviation of FCS experiment.
