www.nature.com/scientificreports
OPEN
received: 17 November 2015 accepted: 26 January 2016 Published: 12 February 2016
Chromatic-aberration-corrected diffractive lenses for ultrabroadband focusing Peng Wang, Nabil Mohammad & Rajesh Menon We exploit the inherent dispersion in diffractive optics to demonstrate planar chromatic-aberrationcorrected lenses. Specifically, we designed, fabricated and characterized cylindrical diffractive lenses that efficiently focus the entire visible band (450 nm to 700 nm) onto a single line. These devices are essentially pixelated, multi-level microstructures. Experiments confirm an average optical efficiency of 25% for a three-wavelength apochromatic lens whose chromatic focus shift is only 1.3 μm and 25 μm in the lateral and axial directions, respectively. Super-achromatic performance over the continuous visible band is also demonstrated with averaged lateral and axial focus shifts of only 1.65 μm and 73.6 μm, respectively. These lenses are easy to fabricate using single-step grayscale lithography and can be inexpensively replicated. Furthermore, these devices are thin (
OPEN
received: 17 November 2015 accepted: 26 January 2016 Published: 12 February 2016
Chromatic-aberration-corrected diffractive lenses for ultrabroadband focusing Peng Wang, Nabil Mohammad & Rajesh Menon We exploit the inherent dispersion in diffractive optics to demonstrate planar chromatic-aberrationcorrected lenses. Specifically, we designed, fabricated and characterized cylindrical diffractive lenses that efficiently focus the entire visible band (450 nm to 700 nm) onto a single line. These devices are essentially pixelated, multi-level microstructures. Experiments confirm an average optical efficiency of 25% for a three-wavelength apochromatic lens whose chromatic focus shift is only 1.3 μm and 25 μm in the lateral and axial directions, respectively. Super-achromatic performance over the continuous visible band is also demonstrated with averaged lateral and axial focus shifts of only 1.65 μm and 73.6 μm, respectively. These lenses are easy to fabricate using single-step grayscale lithography and can be inexpensively replicated. Furthermore, these devices are thin (
