1. Center for Organic Photonics and Electronics Research (OPERA) and Department of Applied Chemistry Kyushu University 744 Motooka Nishi Fukuoka 819‐0395 Japan
2. JST ERATO Adachi Molecular Exciton Engineering Project c/o Center for Organic Photonics and Electronics Research (OPERA) Kyushu University 744 Motooka, Nishi Fukuoka 819‐0395 Japan
3. International Institute for Carbon Neutral Energy Research (WPI‐I2CNER) Kyushu University 744 Motooka, Nishi Fukuoka 819‐0395 Japan
4. National Metrology Institute of Japan (NMIJ) National Institute of Advanced Industrial Science and Technology (AIST) Tsukuba Central 5, 1‐1‐1 Higashi Tsukuba Ibaraki 305‐8565 Japan
5. Center for Frontier Science Chiba University Chiba 263‐8522 Japan
6. Graduate School of Science and Engineering Chiba University Chiba 263‐8522 Japan