Evanescent quadrupole polariton |
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| Authors: | Oleksiy Roslyak Joseph L Birman |
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| Institution: | 1. Center for Advanced Materials Technology (CAMT), School of Aerospace Mechanical & Mechatronic Engineering, J07, The University of Sydney, NSW 2006, Australia;2. WPI Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), Tsukuba, Ibaraki 3050044, Japan;3. Centre for Clean Energy Technology, School of Chemistry and Forensic Science, University of Technology, Sydney, NSW 2006, Australia;1. College of Materials Science and Engineering, Hunan University, Changsha 410082, People''s Republic of China;2. College of Mechanical Engineering, Hunan University of Arts and Science, Changde 415000, People''s Republic of China;1. Department of Chemistry, Oklahoma State University, Stillwater, OK 74078, USA;2. Brewer Science Inc., 2401 Brewer Drive, Rolla, MO 65401, USA;3. Department of Mechanical Engineering, Purdue School of Engineering and Technology, Indiana University – Purdue University Indianapolis, IN 46202, USA;4. Department of Chemical Engineering, Ben-Gurion University of the Negev, P.O. Box 653, 84105 Beer-Sheva, Israel;1. Department of Physics, Faculty of Science, King Abdulaziz University, North Jeddah Branch, P.O. Box 80203, Jeddah 21589, Kingdom of Saudi Arabia;2. Laboratoire de Micro-Optoélectroniques et des Nanostructures, Université de Monastir, Tunisia;3. Department of Physics, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Kingdom of Saudi Arabia;4. Laboratoire de Micro-Optoélectroniques et des Nanostructures, Université de Sousse, Tunisia |
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| Abstract: | In this work we demonstrate the formation of a new type of polariton on the interface between a cuprous oxide slab and a polystyrene microsphere placed on the slab. The evanescent field of the resonant whispering gallery mode (WGM) of the microsphere has a substantial gradient, and therefore effectively couples with the quadrupole 1S excitons in cuprous oxide. This evanescent polariton has a long lifetime, which is determined only by its excitonic and WGM component. The polariton lower branch has a well-pronounced minimum. This suggests that this excitation is localized and can be utilized for possible BEC. The spatial coherence of the polariton can be improved by assembling the microspheres into a linear chain. |
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