Liu Mengxu, Gong Biping
Physics Department, Huazhong University of Science and Technology, Wuhan, 430074, China.
Sci Rep. 2020 Oct 1;10(1):16285. doi: 10.1038/s41598-020-72850-6.
The gravitational wave (GW) has opened a new window to the universe beyond the electromagnetic spectrum. Since 2015, dozens of GW events have been caught by the ground-based GW detectors through laser interferometry. However, all the ground-based detectors are L-shaped Michelson interferometers, with very limited directional response to GW. Here we propose a three-dimensional (3-D) laser interferometer detector in the shape of a regular triangular pyramid, which has more spherically symmetric antenna pattern. Moreover, the new configuration corresponds to much stronger constraints on parameters of GW sources, and is capable of constructing null-streams to get rid of the signal-like noise events. A 3-D detector of kilometer scale of such kind would shed new light on the joint search of GW and electromagnetic emission.
引力波（GW）为超越电磁频谱的宇宙打开了一扇新窗口。自2015年以来，地基引力波探测器通过激光干涉测量法捕捉到了数十次引力波事件。然而，所有地基探测器都是L形迈克尔逊干涉仪，对引力波的定向响应非常有限。在此，我们提出一种正三棱锥形状的三维（3-D）激光干涉仪探测器，其具有更接近球对称的天线方向图。此外，这种新配置对引力波源参数的约束更强，并且能够构建零流以消除类似信号的噪声事件。这种千米规模的三维探测器将为引力波与电磁辐射的联合探测带来新的启示。
