TY - JOUR
T1 - Dual-Color Coherent Perfect Absorber
AU - Xue, Boyi
AU - Lin, Jintian
AU - Hou, Jiankun
AU - Zhu, Yicheng
AU - Ma, Ruixin
AU - Chen, Xianfeng
AU - Cheng, Ya
AU - Ge, Li
AU - Wan, Wenjie
N1 - Publisher Copyright:
© 2025 American Physical Society.
PY - 2025/1/10
Y1 - 2025/1/10
N2 - Perfect absorption of light critically affects light-matter interaction for various applications. Coherent perfect absorbers (CPAs) gain the unique capability of controlling light with light in a linear fashion. Multicolor CPAs [S. Longhi, Time-reversed optical parametric oscillation, Phys. Rev. Lett. 107, 033901 (2011)PRLTAO0031-900710.1103/PhysRevLett.107.033901] are highly desirable for broadband and nonlinear light-to-light coherent control but the experimental demonstration has still remained elusive. Here, for the first time, we experimentally observe a dual-color version of a CPA (DC-CPA) through a second harmonic generation in a single whispering-gallery-mode microcavity. The DC-CPA enables simultaneous perfect absorption of both the incoming fundamental wave and its second harmonic. Similar to its linear counterpart, coherent control in the DC-CPA can also be realized by tuning the relative phase and intensity between the two-colored waves through nonlinear interference instead of the linear one. This scheme breaks the linear boundary of the traditional CPA into a multifrequency domain and paves the way toward all-optical signal processing and quantum information.
AB - Perfect absorption of light critically affects light-matter interaction for various applications. Coherent perfect absorbers (CPAs) gain the unique capability of controlling light with light in a linear fashion. Multicolor CPAs [S. Longhi, Time-reversed optical parametric oscillation, Phys. Rev. Lett. 107, 033901 (2011)PRLTAO0031-900710.1103/PhysRevLett.107.033901] are highly desirable for broadband and nonlinear light-to-light coherent control but the experimental demonstration has still remained elusive. Here, for the first time, we experimentally observe a dual-color version of a CPA (DC-CPA) through a second harmonic generation in a single whispering-gallery-mode microcavity. The DC-CPA enables simultaneous perfect absorption of both the incoming fundamental wave and its second harmonic. Similar to its linear counterpart, coherent control in the DC-CPA can also be realized by tuning the relative phase and intensity between the two-colored waves through nonlinear interference instead of the linear one. This scheme breaks the linear boundary of the traditional CPA into a multifrequency domain and paves the way toward all-optical signal processing and quantum information.
UR - https://www.scopus.com/pages/publications/85214414100
U2 - 10.1103/PhysRevLett.134.013802
DO - 10.1103/PhysRevLett.134.013802
M3 - 文章
C2 - 39913734
AN - SCOPUS:85214414100
SN - 0031-9007
VL - 134
JO - Physical Review Letters
JF - Physical Review Letters
IS - 1
M1 - 013802
ER -