Schematic of the proposed resonator (IMAGE) Tampere University Caption Schematic of the proposed resonator, where the back mirror has been replaced with an eENZ mirror. Image: Matias Koivurova Credit Matias Koivurova / Tampere University Usage Restrictions Can be used when referring to this article. License Original 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.