6533b831fe1ef96bd12996b0

RESEARCH PRODUCT

Amplitude modulation technique for designing metalenses with apodized and enhanced resolution focal spots

Mahin NaserpourMahin NaserpourCarlos J. Zapata-rodríguezAmin MoazamiMahdieh Hashemi

subject

PhysicsFocal pointbusiness.industryResolution (electron density)Astrophysics::Instrumentation and Methods for AstrophysicsPhase (waves)02 engineering and technology021001 nanoscience & nanotechnology01 natural sciencesAtomic and Molecular Physics and OpticsElectronic Optical and Magnetic Materials010309 opticsAmplitude modulationAmplitudeOpticsApodization0103 physical sciencesElectrical and Electronic EngineeringPhysical and Theoretical Chemistry0210 nano-technologybusinessLithographyPhase modulation

description

Abstract In this paper we show that engineering both phase and amplitude of the scattered light can be employed in designing metalenses with either higher resolution or apodized focal spots. C-shaped split-ring micro-resonators (CSRRs) with different geometrical parameters are selected to have a full control of amplitude and phase. While phase engineering is necessary for light focusing, amplitude modulation of the scattered wave can be applied to characterize the focal point properties such as resolution gain and sidelobe level. We show that both axial and transverse resolution improvement or apodization is possible in the far-field region by applying proper amplitude function. Amplitude modulation technique, which is introduced in this paper, paves a new way to design efficient lenses which can be utilized in imaging and lithography applications in all frequency ranges.

yearjournalcountryeditionlanguage
2017-06-01Optics Communications
https://doi.org/10.1016/j.optcom.2017.02.032