武汉大学主页平台管理系统 Xiao Meng--English-- A journey through bound states in the continuum in periodic optical structures

Personal Information

Journal:
Photonics Insights
Abstract:
Bound states in the continuum (BIC) were first identified by von Neumann and Wigner [1] almost a century ago. At that time, they pointed out an intriguing phenomenon: a state could be bound by a special oscillating potential distribution, even when the state’s energy is higher than the maximum of the potential. According to the principles taught in elementary quantum mechanics, the energy of such a state should lie within the continuum spectrum; thus it is referred to a bound state in the continuum. In the past two decades, thanks to advancements in fabrication technology, this counterintuitive phenomenon has been intensively investigated and extended to various kinds of classical wave systems [2–4]. According to the non-existence theorem [5], a system sustaining a BIC must be periodic in at least one direction unless materials with extreme parameters (ie, ε, μ= 0 or∞) are chosen [6, 7]. Periodicity along with the flexibility, tunability, and rich application prospects of optical systems make periodic optical structures an excellent platform for exploring BICs.
Volume:
3
Issue:
2
Page Number:
C05-C05
Translation or Not:
no
Date of Publication:
2024-06-28