The nanobutterfly (IMAGE) Hokkaido University Caption Calculated localized field (left) and temperature distribution (right) of the nano-butterfly structure. Credit Fujiwara H., et al, Nano Letters. December 23, 2019. Usage Restrictions This image is copyrighted and can be used for reporting this press release if properly credited. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.