Ten more times precision improved method for surface roughness estimation with weak measurement

• URL: http://arxiv.org/abs/2202.13644v1
• Date: Mon, 28 Feb 2022 09:39:28 GMT
• Title: Ten more times precision improved method for surface roughness estimation with weak measurement
• Authors: Hui-Chao Qu, Ya Xiao, Xin-Hong Han, Shan-Chuan Dong and Yong-Jian Gu
• Abstract summary: We propose two weak measurement schemes to estimate surface roughness through spectrum analysis and intensity analysis. The precision and sensitivity of the light intensity analysis scheme achieve as high as 0.07 nm and 1/nm, respectively. By introducing a modulated phase, we show that the sensitivity and precision achieved in our schemes can be effectively retained in a wider dynamic range.
• Score: 2.715899425311976
• License: http://creativecommons.org/licenses/by-nc-sa/4.0/
• Abstract: High-precision surface roughness estimation plays an important role in many applications. However, the classical estimating methods are limited by shot noise and only can achieve the precision of 0.1 nm with white light interferometer. Here, we propose two weak measurement schemes to estimate surface roughness through spectrum analysis and intensity analysis. The estimating precision with spectrum analysis is about $10 ^{-5}$ nm by using a currently available spectrometer with the resolution of $\Delta \lambda= 0.04$ pm and the corresponding sensitivity is better than 0.1 THz/nm. And the precision and sensitivity of the light intensity analysis scheme achieve as high as 0.07 nm and 1/nm, respectively. By introducing a modulated phase, we show that the sensitivity and precision achieved in our schemes can be effectively retained in a wider dynamic range. We further provide the experimental design of the surface profiler based on our schemes. It simultaneously meets the requirements of high precision, high sensitivity, and wide measurement range, making it to be a promising practical tool.

Related papers

• Quantum entanglement enabled ellipsometer for phase retardance measurement [2.9419766179487605]
  The accuracy can reach to nanometer scale at extremely low input intensity, and the stability are within 1% for all specimens tested with a compensator involved. Our work paves the way for precision measurement at low incident light intensity, with potential applications in measuring photosensitive materials, active-biological samples and other remote monitoring scenarios.
  arXiv  Detail & Related papers  (2024-02-27T10:48:22Z)
• Precision Enhancement in Spatial Measurement by Introducing Squeezed Light into Weak Value Amplification [8.238656454998022]
  It is the first time combining the WVA technique and squeezed beam injection to experimentally realize high-precision optical spatial measurement. The precision enhancement of 1.3 times can be achieved at 500kHz by adding a squeezed beam in the vacuum input port of the Mach-Zehnder interferometer.
  arXiv  Detail & Related papers  (2023-11-28T09:24:08Z)
• Optimal baseline exploitation in vertical dark-matter detectors based on atom interferometry [50.06952271801328]
  Several terrestrial detectors for gravitational waves and dark matter based on long-baseline atom interferometry are currently in the final planning stages or already under construction. We show that resonant-mode detectors based on multi-diamond fountain gradiometers achieve the optimal, shot-noise limited, sensitivity if their height constitutes 20% of the available baseline.
  arXiv  Detail & Related papers  (2023-09-08T08:38:24Z)
• Optimal phase measurements in a lossy Mach-Zehnder interferometer [0.5249805590164902]
  We discuss two phase-measurement methods for the Mach-Zehnder interferometer (MZI) in the presence of internal losses. We find theoretically that when the core parameters (reflectivities, phase difference) are optimized, the phase sensitivity of the two methods can reach a generalized bound on precision.
  arXiv  Detail & Related papers  (2023-02-22T18:21:42Z)
• Predicting Surface Texture in Steel Manufacturing at Speed [81.90215579427463]
  Control of the surface texture of steel strip during the galvanizing and temper rolling processes is essential to satisfy customer requirements. We propose the use of machine learning to improve accuracy of the transformation from inline laser reflection measurements to a prediction of surface properties.
  arXiv  Detail & Related papers  (2023-01-20T12:11:03Z)
• Retrieving space-dependent polarization transformations via near-optimal quantum process tomography [55.41644538483948]
  We investigate the application of genetic and machine learning approaches to tomographic problems. We find that the neural network-based scheme provides a significant speed-up, that may be critical in applications requiring a characterization in real-time. We expect these results to lay the groundwork for the optimization of tomographic approaches in more general quantum processes.
  arXiv  Detail & Related papers  (2022-10-27T11:37:14Z)
• Two-colour spectrally multimode integrated SU(1,1) interferometer [77.34726150561087]
  We develop and investigate an integrated multimode two-colour SU (1,1) interferometer that operates in a supersensitive mode. By ensuring a proper design of the integrated platform, we suppress dispersion and thereby significantly increase the visibility of the interference pattern. We demonstrate that such an interferometer overcomes the classical phase sensitivity limit for wide parametric gain ranges, when up to $3*104$ photons are generated.
  arXiv  Detail & Related papers  (2022-02-10T13:30:42Z)
• Investigation and comparison of measurement schemes in the low frequency biosensing regime using solid-state defect centers [58.720142291102135]
  Solid state defects in diamond make promising quantum sensors with high sensitivity andtemporal resolution. Inhomogeneous broadening and drive amplitude variations have differing impacts on the sensitivity depending on the sensing scheme used. We numerically investigate and compare the predicted sensitivity of schemes based on continuous-wave (CW) optically detected magnetic resonance (ODMR) spectroscopy, pi-pulse ODMR and Ramsey interferometry.
  arXiv  Detail & Related papers  (2021-09-27T13:05:23Z)
• Maximising Precision in Saturation-Limited Absorption Measurements [0.0]
  We present a classical probe-sample optimisation strategy to maximise precision. We find that optimal probe powers always fall within the saturation regime. We evaluate amplitude-squeezed light as a viable experimental probe state.
  arXiv  Detail & Related papers  (2021-07-16T13:19:39Z)
• Spectrally multimode integrated SU(1,1) interferometer [50.591267188664666]
  The presented interferometer includes a polarization converter between two photon sources and utilizes a continuous-wave (CW) pump. We show that this configuration results in almost perfect destructive interference at the output and supersensitivity regions below the classical limit.
  arXiv  Detail & Related papers  (2020-12-07T14:42:54Z)
• Quantum Enhanced Precision Estimation of Transmission with Bright Squeezed Light [0.0]
  We show simultaneous enhancement of precision and sensitivity to beyond the quantum noise limit (QNL) for estimating transmission with a squeezed amplitude probe of 0.2 mW average (25 W peak) power. Our approach enables measurements that compete with the optical powers of current classical techniques, but have both improved precision and sensitivity beyond the classical limit.
  arXiv  Detail & Related papers  (2020-09-25T21:15:38Z)

This list is automatically generated from the titles and abstracts of the papers in this site.

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.