Abstract
Novel optical properties in graded photonic super-crystals can be further explored if new types of graded photonic super-crystals are fabricated. In this paper, we report holographic fabrication of graded photonic super-crystal with eight graded lattice clusters surrounding the central non-gradient lattices through pixel-by-pixel phase engineering in a spatial light modulator. The prospect of applications of octagon graded photonic super-crystal in topological photonics is discussed through photonic band gap engineering and coupled ring resonators.
Keywords: 2D photonic crystal, graded photonic supercrystal, holographic fabrication, photonic band structure
Funding Information National Science Foundation (NSF) (Nos. 1661842 and 1661749).
Footnotes
Safaa Hassan received his B.S. and M.S. degrees in Physics from Mustansiriyah University, Baghdad, Iraq, in 2002 and 2005 respectively. In 2005 - 2008, he worked as a researcher in the College of Science/Department of Physics and College of Engineering, Mustansiriyah University, Baghdad, Iraq. In 2008 - 2013, he was hired as a Lecturer in the Department of Physics/College of Science, Mustansiriyah University. He is a Ph. D. candidate at University of North Texas. His current research interests include holographic fabrication of photonic crystals and graded photonic super-crystals, light extraction in organic light emitting diode (OLED) and gradient index photonic devices.
Usha Philipose received her B.S, M.S. and M.Phil. degrees in Physics from University of Bombay, India. She received her Ph.D. degree in Materials Science and Engineering from University of Toronto, Canada, in 2006. She later worked as a postdoctoral researcher at the Centre for Advanced Nanotechnology, University of Toronto, Canada. She joined the Department of Physics at the University of North Texas, Denton in 2008 as an Assistant Professor. She received tenure and was promoted to the rank of an Associate Professor in 2014. Her current research interests include studying electron, photon and phonon transport in 1D nanostructures, as well as increasing the complexity of these structures to study effect on certain functionalities such as its optoelectronic and energy conversion capabilities.
Hualiang Zhang is an Associate Professor at the Electrical and Computer Engineering Department, University of Massachusetts Lowell. He received his B.S. degree in Electrical Engineering from the University of Science and Technology of China in 2003. He received his Ph.D. degree in Electrical and Computer Engineering from the Hong Kong University of Science and Technology in 2007. From 2007 to 2009, he was a postdoctoral research associate in the Department of Electrical and Computer Engineering at the University of Arizona. From 2009 to Jan. 2016, he was a faculty member at the University of North Texas. His research interests include metamaterials, nano-photonics, optoelectronics, RF/microwave/millimeter-wave circuits and systems, antennas, and their applications. He is the co-author of over 200 journal and conference papers. Dr. Zhang is a senior member of IEEE.
Yuankun Lin received his B.S. and M.S. degrees in Physics from Nankai University, Tianjin, China, in 1991 and 1994, respectively. He received his Ph.D. degree in Physics from the University of British Columbia, Vancouver, Canada, in 2000. In 2000 - 2004, he worked as a postdoctoral research fellow in photonics group in the Department of Electrical and Computer Engineering, University of Toronto. Then he was hired as an Assistant Professor in 2004 and promoted to an Associate Professor in 2007 at University of Texas Pan American. In 2010, he was hired as an Associate Professor in the Department of Physics and Department of Electrical Engineering at the University of North Texas and promoted to Full Professor in 2015. His current research interests include holographic fabrication of photonic crystals and graded photonic super-crystals, light extraction in OLED, gradient index photonic devices and phase mask.
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