Fig. 4: Spectrum distribution in CM, SWM, and BWM schemes.
From: Improving the precision of optical metrology by detecting fewer photons with biased weak measurement
The spectrum re- distributions of a CM, b SWM, and c BWM are shown when the magnetic field is turned on. Here, blue and red curves represent the spectrum distribution before and after turning on the magnetic field. In d–f the electron number redistributions for CM, SWM, and BWM are shown for varying numbers of the incident photon. Typically, a larger photon number leads to more pixels becoming saturated in the CMOS. For CM and SWM, nearly all the pixels saturate when n approaches 108 and 109, and then the CMOS outputs a flattening profile, which limits the precision of the two protocols. By contrast, BWM is more robust to DSE because there is an ultra-sensitive extinction point, which is difficult to saturate even for 1010 photons
