1. A method for imaging an object, said method comprising: positioning the object between a light source and a metalens, wherein the metalens includes a metallic film having a plurality of slits defined therethrough, the plurality of slits having a width a and a periodicity d; emitting light from the light source towards the object, wherein the emitted light has a predetermined wavelength greater than the width a and the periodicity d; acquiring, using a detector, measurements indicative of light transmitted through the metalens; and reconstructing, using a computing device communicatively coupled to the detector, an image of the object based on the acquired measurements.