Focusing Light with Curved Guided-Mode Resonance Reflectors
AbstractEmploying numerical simulations, we investigate the possibility of using curved guided-mode resonance (GMR) elements to focus light in reflection. We treat GMR reflectors with a parabolic shape and show that they are capable of focusing light effectively across wavelength bands that extend several hundred nanometers. The spatially infinite reflector model is simulated with a finite-element method, whereas the spatially finite reflector is treated with a finite-difference-time-domain method. The numerical results demonstrate that light intensity at the focal point is 8.6 dB stronger than the incident intensity when the GMR reflector’s size is on the order of 10 wavelengths. The results indicate potential applicability of wideband-focusing devices in electromagnetics and photonics using compact resonance elements.
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Lu, M.; Zhai, H.; Magnusson, R. Focusing Light with Curved Guided-Mode Resonance Reflectors. Micromachines 2011, 2, 150-156.
Lu M, Zhai H, Magnusson R. Focusing Light with Curved Guided-Mode Resonance Reflectors. Micromachines. 2011; 2(2):150-156.Chicago/Turabian Style
Lu, Mingyu; Zhai, Huiqing; Magnusson, Robert. 2011. "Focusing Light with Curved Guided-Mode Resonance Reflectors." Micromachines 2, no. 2: 150-156.