DataVXAdvanced Optical MaterialsPaper
journal article·2018-07

Strong Nonlinear Optical Response in the Visible Spectral Range with Epsilon‐Near‐Zero Organic Thin Films

Yeon Ui Lee, Eleonora Garoni, Hanayo Kita, Kenji Kamada, Byung Hoon Woo, Young Chul Jun, Sang Min Chae, Hyo Jung Kim, Kwang Jin Lee, Seokhyun Yoon, Eunyoung Choi, Fabrice Mathevet, Igor Ozerov, Jean Charles Ribierre, Jeong Weon Wu, Anthony D'Aléo

Advanced Optical Materials· Volume 6· Issue 14
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Source abstract

Abstract

Abstract Enhanced Kerr nonlinearities are observed in metamaterials such as conducting oxides and doped inorganic semiconductor thin films showing epsilon‐near‐zero (ENZ) response in the infrared region. However, to achieve ENZ in the visible, artificial metamaterials with more complex nanostructures have to be specifically designed. Here, using sodium [5,6‐dichloro‐2‐[[5,6‐dichloro‐1‐ethyl‐3‐(4‐sulphobutyl)‐benzimidazol‐2‐ylidene]‐propenyl]‐1‐ethyl‐3‐(4‐sulphobutyl)‐benzimidazolium hydroxide] and [2,4‐bis[8‐hydroxy‐1,1,7,7‐tetramethyljulolidin‐9‐yl]squaraine] organic thin films, ENZ responses between 450 and 620 nm are demonstrated. Both nonlinear refractive index and nonlinear absorption coefficient are enhanced by more than two orders of magnitude in the ENZ spectral region. These optical effects in the visible spectral range come from the strongly dispersive permittivity of molecular aggregates resulting from the coupling of excitonic transition dipoles. These findings open the path toward a next generation of high‐performance solution‐processable organic nonlinear optical materials with ENZ properties that can be tuned by molecular engineering.
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Research context

NanomaterialsElectronic materials

OpenAlex topics: Nonlinear Optical Materials Research · Advanced Fiber Laser Technologies · Nonlinear Optical Materials Studies

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Physics Ewha Womans University Seoul 03760 Republic of Korea

Dipartimento di Chimica Università degli Studi di Milano via Golgi 19 Milan 20133 Italy

IFMRI National Institute of Advanced Industrial Science and Technology (AIST) Ikeda Osaka 563 8577 Japan

Department of Chemistry School of Science and Technology Kwansei Gakuin University Sanda Hyogo 669 1337 Japan

Department of Materials Science and Engineering Ulsan National Institute of Science and Technology 50 UNIST‐gil Ulju‐gun Ulsan 44919 Republic of Korea

Department of Organic Materials Science and Engineering Pusan National University Pusan 609‐735 Republic of Korea

Sorbonne Universités UPMC Univ Paris 06 CNRS Institut Parisien de Chimie Moléculaire, UMR 8232 Chimie des Polymères Paris France

Aix Marseille Univ CNRS CINaM UMR 7325 Campus de Luminy Case 913 13288 Marseille France

College of Optical Science and Engineering Zheijiang University Hangzhou 310027 China

Center for Quantum Nanoscience Institute for Basic Science (IBS) Seoul 03760 Republic of Korea

Building Blocks for Future Electronics Laboratory (2B‐FUEL) The joint CNRS‐Ewha‐Yonsei Laboratory UMI CNRS 2002 Seoul 03760 Republic of Korea

Funding

Ministry of Science ICT and Future Planning

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