Diffraction properties of quasi-random pinhole arrays: suppression of higher orders and background fluctuations

A transmission grating can be formed from quasi-random pinhole arrays. We show here that this type of grating can reduce the higher diffraction orders effectively when an appropriate arrangement is used. A simple but accurate analytical model is provided to describe the physical mechanism that is re...

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Bibliographic Details
Published in:Journal of modern optics 2017-11, Vol.64 (21), p.2420-2427
Main Authors: Wei, Lai, Qian, Feng, Yang, Zuhua, Zhang, Qiangqiang, Chen, Yong, Wu, Yinzhong, Fan, Quanping, Cao, Leifeng
Format: Article
Language:English
Subjects:
Arrays
Computer simulation
Diffraction
Digital transmission
Fluctuations
grating
Gratings (spectra)
Higher-order diffraction suppression
Mathematical models
Pinholes
spectroscopy
Wavelengths
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Summary:A transmission grating can be formed from quasi-random pinhole arrays. We show here that this type of grating can reduce the higher diffraction orders effectively when an appropriate arrangement is used. A simple but accurate analytical model is provided to describe the physical mechanism that is responsible for suppression of the higher orders, and this model is verified through numerical simulations. In particular, the background intensity enhancement and the fluctuations in this intensity that are introduced by the quasi-random arrangement of pinholes are also assessed. The consistent one-to-one match produced between the diffraction directions and the wavelengths means that this type of grating has considerable potential for use in spectroscopic measurement and monochromator applications.
ISSN:0950-0340
1362-3044
DOI:10.1080/09500340.2017.1367853