TY - JOUR
T1 - Free-electron Brewster-transition radiation
AU - Chen, Ruoxi
AU - Chen, Jialin
AU - Gong, Zheng
AU - Zhang, Xinyan
AU - Zhu, Xingjian
AU - Yang, Yi
AU - Kaminer, Ido
AU - Chen, Hongsheng
AU - Zhang, Baile
AU - Lin, Xiao
N1 - Publisher Copyright: Copyright © 2023 The Authors, some rights reserved.
PY - 2023/8
Y1 - 2023/8
N2 - We reveal a mechanism to enhance particle-matter interactions by exploiting the pseudo-Brewster effect of gain materials, presenting an enhancement of at least four orders of magnitude for light emission. This mechanism is enabled by the emergence of an unprecedented phase diagram that maps all phenomena of free-electron transition radiation into three distinct phases in a gain-thickness parameter space, namely, the conventional, intermediate, and Brewster phases, when an electron penetrates a dielectric slab with a modest gain and a finite thickness. Essentially, our revealed mechanism corresponds to the free-electron transition radiation in the Brewster phase, which also features ultrahigh directionality, always at the Brewster angle, regardless of the electron velocity. Counterintuitively, we find that the intensity of this free-electron Brewster-transition radiation is insensitive to the Fabry-Pérot resonance condition and, thus, the variation of slab thickness, and moreover, a weaker gain could lead to a stronger enhancement for light emission.
AB - We reveal a mechanism to enhance particle-matter interactions by exploiting the pseudo-Brewster effect of gain materials, presenting an enhancement of at least four orders of magnitude for light emission. This mechanism is enabled by the emergence of an unprecedented phase diagram that maps all phenomena of free-electron transition radiation into three distinct phases in a gain-thickness parameter space, namely, the conventional, intermediate, and Brewster phases, when an electron penetrates a dielectric slab with a modest gain and a finite thickness. Essentially, our revealed mechanism corresponds to the free-electron transition radiation in the Brewster phase, which also features ultrahigh directionality, always at the Brewster angle, regardless of the electron velocity. Counterintuitively, we find that the intensity of this free-electron Brewster-transition radiation is insensitive to the Fabry-Pérot resonance condition and, thus, the variation of slab thickness, and moreover, a weaker gain could lead to a stronger enhancement for light emission.
UR - http://www.scopus.com/inward/record.url?scp=85167745033&partnerID=8YFLogxK
U2 - https://doi.org/10.1126/sciadv.adh8098
DO - https://doi.org/10.1126/sciadv.adh8098
M3 - مقالة
C2 - 37566659
SN - 2375-2548
VL - 9
JO - Science Advances
JF - Science Advances
IS - 32
M1 - eadh8098
ER -