Characterization of photonic nanojets in dielectric microdisks |
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| Institution: | 1. Department of Solid Mechanics and Design, Faculty of Mechanical Engineering, University Technology Malaysia – UTM, 81310 UTM Skudai, Johor, Malaysia;2. School of Engineering, Griffith University, Gold Coast Campus, Southport 4222, Australia;3. School of Engineering, The University of Newcastle, Callaghan, New South Wales 2308, Australia;1. Institute of Theoretical Physics and Astronomy, Vilnius University, A. Gostauto 12, LT-01108 Vilnius, Lithuania;2. Young Researchers and Elite Club, Mashhad Branch, Islamic Azad University, Mashhad, Iran;1. Department of Physics, Banaras Hindu University, Varanasi 221005, U.P., India |
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| Abstract: | The direct imaging of photonic nanojets in different dielectric microdisks illuminated by a laser source is reported. The SiO2 and Si3N4 microdisks are of height 650 nm with diameters ranging from 3 μm to 8 μm. The finite-difference time-domain calculation is used to execute the numerical simulation for the photonic nanojets in the dielectric microdisks. The photonic nanojet measurements are performed with a scanning optical microscope system. The photonic nanojets with high intensity spots and low divergence are observed in the dielectric microdisks illuminated from the side with laser source of wavelengths 405 nm, 532 nm and 671 nm. The experimental results of key parameters are compared to the simulations and in agreement with theoretical results. Our studies show that photonic nanojets can be efficiently created by a dielectric microdisk and straightforwardly applied to nano-photonics circuit. |
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| Keywords: | Photonic nanojet Microdisk Microscopy |
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