Formation of polystyrene microlenses via transient droplets from the ouzo effect. Recently it was shown that precisely tailored diffraction of light on a binary mask can create a sub wavelength optical hotspot that can be used for optical imaging with resolution far exceeding that of conventional optical instruments 2. Subwavelength laser nanopatterning using droplet lenses. Nanoscale patterns on rigid or flexible substrates are of considerable interest in modern nanophotonics and optoelectronics devices. Plasmonic cavities for enhanced spotaneous emission the harvard community has made this article openly available. Hyperbolic secant slit lens for subwavelength focusing of light. Optical vortex generators for telecom wavelengths with subwavelength patterns of. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext. These droplets are generated from an aqueous suspension of nanoparticles by electrospray and dispensed through a. By nanostructuring a gold film we created an array of meta lenses generating foci of 160 nm 0.
First, we use laserinduced forward transfer lift 23 to print droplets with sizes ranging from 10 to 200. Recently, methods of micro and nanoprocessing of materials by direct fs laser irradiation have aroused great interests in the field of laser processing and have become a powerful micro and nanofabrication technique for different applications 512. Subwavelength focus of light by a planar microlens. The lens arrays of different initial focal lengths and apertures can be fabricated by using the droplets of different volumes. Subwavelength structures are produced in this study by using a laser beam and microdroplets that carry nanoparticles to the deposition substrate. We show that a planar plasmonic metamaterial with spatially variable. Simulation of the intensity and focusing enhancement produced by droplet assisted laser processing. Planar optical lenses are fundamental elements of miniaturized photonic devices. Here we focus light into subwavelength spots with metamaterials, but without making use of negative refraction. We attribute the occurrence of sub wavelength hotspots beyond the near field to the phenomenon of superoscillation.
However, conventional planar optical lenses are constrained by the diffraction limit in the optical farfield due to the bandlimited wavevectors supported by freespace and loss of highspatialfrequency evanescent components. From these variations, the bit information on the disk can be deduced. Photonic ic for optical detection with sub wavelength. A superlens is a lens that uses special materials to go beyond the. Optical detection and spectroscopy of single absorbers in solids. A superlens is a lens that uses special materials to go beyond the diffraction limit a feature of conventional lenses that limits the fineness of resolution, and a team led by boliang jia and.
Individual or arrayed microlenses offer remarkable opportunities in optics and photonics. Here, the spontaneous formation of such lenses is exploited to overcome the diffraction limit of a conventional laser directwriting system. Clause xu 3120 bowfield way west lafayette, in 47906 phone. Memsinthelens architecture for laser scanning microscopy. Next, we use the printed droplets as lenses to focus laser pulses directly below each droplet, locally modifying the surface. Photonic ic for optical detection with sub wavelength resolution f. The recent development of using surface plasmon resonances to concentrate optical field into subwavelength scale further extended cqed research of into a new regime. The noncomposite, fully optically isotropic, and lowloss metamaterial, as is proposed here, is very promising for significant future applications including, perfect lenses with resolution beyond optical limits, bandpass filters, frequency multipliers, thz subwavelength resolution imaging systems, and security systems. Color images a and f were taken from the eyepiece using an iphone 7 plus camera.
Our results firmly establish that metalenses can have widespread applications in laserbased microscopy, imaging, and spectroscopy. Towards nanofabrication with uv femtosecond fiber laser draft3. Faraon, highly tunable elastic dielectric metasurface lenses, laser photn. National science foundation 64 hans tech phase ii award no 1058494 award amount. By using a photonic ic we can detect the variation of this mode to mode coupling, when the bit pattern is moved. Broadband subwavelength imaging using a tunable graphene. We show that a planar plasmonic metamaterial with spatially variable metaatom parameters can focus transmitted light into subwavelength hotspots located beyond the nearfield of the metamaterial. Geometrycontrollable microoptics with laser catapulting. Recently it was shown that precisely tailored diffraction of light on a binary mask can create a subwavelength optical hotspot that can be used for optical imaging with resolution far exceeding that of conventional optical instruments 2. Burge, analysis of wavefront propagation using the talbot effect, appl.
Optics for hire introduces lens database for optical engineers. The metalenses can resolve nanoscale features separated by subwavelength distances and provide magnification as high as 170. Arrays of nanoscale lenses for subwavelength optical lithography. The light reflects on the disk and couples back into the modes of the waveguide. Plasmonic cavities for enhanced spotaneous emission. Rapid fabrication of mini droplet lens array with tunable focal length. Rapid fabrication of mini droplet lens array with tunable focal. Abstractwe numerically show that using a planar gradientindex grin microlens it is possible to focus coherent light of wavelength. Poly ethylene glycol peg polymer lens arrays are made by using dippen. As a lowdimensional optical fiber with diameter close to or below the wavelength of light, optical micronanofiber mnf offers a number of favorable properties for optical sensing, which have been exploited in a variety of sensing applications, including physical, chemical, and biological sensors. Here, we demonstrate how laser catapulting lcp, a recent laser based additive manufacturing technique, enables the preparation of microlenses with controlled. In situ printing of liquid superlenses for subdiffractionlimited color.
By nanostructuring a gold film we created an array of metalenses generating foci of 160 nm 0. Partnerships sbirsttr phase ii grantee conference may 9th12th, 2011 baltimore, md preface the small business innovation research sbir program and the small business technology transfer sttr program were conceived at the national science foundation nsf. Subwavelength resolution is also possible with optical antennas, the nanoscale. Metamaterials are known to promise subwavelength focusing through negative refraction 1. However, their usage is currently limited by the lack of manufacturing technologies capable of tailoring the lens geometry to target devices. Replacement of the grin lens with a photoniccrystal analogue fabricated in silicon is shown practically not to impair the lens performance. Surface nanopatterning over a large, curved area over 200. Integrated anode structure for passive direct methanol fuel cells with neat methanol operation. Optical angular manipulation of liquid crystal droplets in laser tweezers.
Focusing optics collect light transmitted by the subwavelength spot that is. Droplet assisted laser processing dalp addresses the challenges encountered in current micro and nanopatterning techniques. A colormap plot of the intensity distribution of a gaussian beam focused through a 0. Notably, the same laser source used for printing can be used for. Broadband subwavelength imaging using a tunable graphenelens. The liquid lens results in about a factor of 2 intensity enhancement. Nanooptical imaging of subcellular structures and nanopatterned letters. Baets ghent university imec, department of information technology intec sintpietersnieuwstraat 41, 9000 gent, belgium, europe tel. In situ printing of liquid superlenses for subdiffraction. First, we use laser induced forward transfer lift 23 to print droplets with sizes ranging from 10 to 200. Planar superoscillatory lens for subdiffraction optical.
Subwavelength focusing metalens tapashree roy, 1 edward t. Subwavelength laser nanopatterning using droplet lenses ncbi. Radially polarized converter created by femtosecond laser nanostructuring of glass article pdf available in applied physics letters 9820. Another way to achieve subwavelength resolution is with a lens having a negative refractive index. Laserinduced subwavelength structures by microdroplet. A free lens search tool allows optical engineers to search multiple lens.