Author:
Cardea Ivan,Grassani Davide,Fabbri Simon J.,Upham Jeremy,Boyd Robert W.,Altug Hatice,Schulz Sebastian A.,Tsakmakidis Kosmas L.,Brès Camille-Sophie
Abstract
AbstractMost present-day resonant systems, throughout physics and engineering, are characterized by a strict time-reversal symmetry between the rates of energy coupled in and out of the system, which leads to a trade-off between how long a wave can be stored in the system and the system’s bandwidth. Any attempt to reduce the losses of the resonant system, and hence store a (mechanical, acoustic, electronic, optical, or of any other nature) wave for more time, will inevitably also reduce the bandwidth of the system. Until recently, this time-bandwidth limit has been considered fundamental, arising from basic Fourier reciprocity. In this work, using a simple macroscopic, fiber-optic resonator where the nonreciprocity is induced by breaking its time-invariance, we report, in full agreement with accompanying numerical simulations, a time-bandwidth product (TBP) exceeding the ‘fundamental’ limit of ordinary resonant systems by a factor of 30. We show that, although in practice experimental constraints limit our scheme, the TBP can be arbitrarily large, simply dictated by the finesse of the cavity. Our results open the path for designing resonant systems, ubiquitous in physics and engineering, that can simultaneously be broadband and possessing long storage times, thereby offering a potential for new functionalities in wave-matter interactions.
Publisher
Springer Science and Business Media LLC
Reference41 articles.
1. Quimby, R. S. Photonics and Lasers: An Introduction. Photonics and Lasers, Chap. 16 (Wiley, New York, 2006).
2. Van, V. Optical Microring Resonators: Theory, Techniques, and Applications. Contemporary Physics, Chap. 2 (CRC Press, Boca Raton, 2017).
3. Demtröder, W. Laser Spectroscopy, Chap. 3 (Springer, New York, 2014).
4. Khurgin, J. B. Slow light in various media: a tutorial. Adv. Opt. Photonics 2, 287–318 (2010).
5. Bigelow, M. S., Lepeshkin, N. N. & Boyd, R. W. Superluminal and slow light propagation in a room-temperature solid. Science 301, 200–202 (2003).
Cited by
6 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献