Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Diffraction from metal strip gratings with high spatial frequency in the infrared spectral region

Not Accessible

Your library or personal account may give you access

Abstract

A comparative theoretical and experimental study of the diffraction characteristics of high-spatial-frequency aluminum strip gratings as a function of grating thickness is presented. The gratings were made with ZnSe and ZnS substrates by using standard photolithographic techniques and reactive ion etching. A grating period of 3 μm and a fill factor of approximately 0.33 are used. The grating thicknesses vary from 2400 to 9500 Å. Transmittance measurements were carried out in the 7–13-μm-wavelength band in which only the forward and backward zeroth-order waves propagate. The gratings exhibit a long-wavelength bandstop, i.e., a high-pass filtering characteristic in transmission with the transmittance decreasing with increasing grating thickness. For the thickest grating tested (9500 Å), the transmittance was less than 5% for 8.5 μm or greater and dropped to approximately 1.5% at 13 μm. The measured transmittances are compared with results calculated by using the rigorous coupled-wave theory and are found to be in good agreement.

© 1990 Optical Society of America

Full Article  |  PDF Article
More Like This
Analysis of scattering from frequency-selective surfaces in the infrared

Thomas Schimert, Mark E. Koch, and Chi Hou Chan
J. Opt. Soc. Am. A 7(8) 1545-1553 (1990)

Boundary-element analysis of plane-wave diffraction from groove-type dielectric and metallic gratings

Yasunori Nakata and Masanori Koshiba
J. Opt. Soc. Am. A 7(8) 1494-1502 (1990)

Analysis of a strip-grating twist reflector

S. Sohail H. Naqvi and Neal C. Gallagher
J. Opt. Soc. Am. A 7(9) 1723-1729 (1990)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (3)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Tables (2)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved