Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
(a) Time-resolved PA signals with respective to the positions of the PA point source. (b) Normalized angular dependence of frequency response obtained by Fourier transfer of the PA signals in panel (a). The black lines are the FWHM angular-dependent sensitivity calculated from the theoretical model.
