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

Properties of Holographic Gratings Photoinduced in Polymethyl Methacrylate

Not Accessible

Your library or personal account may give you access

Abstract

Polymethyl methacrylate, PMMA, sensitized for λ = 0.325 μm, is shown to exhibit a peak refractive index change of 2.3 × 10−3. The index change has been characterized in relation to its sensitivity, temperature dependence, and development time. The sensitivity of the material is shown to be 1.7 × 10−4α, where α is the intensity absorption coefficient. Laser light scattered by an exposed region is found to produce a double ring pattern due to the graininess of the index variation. Three-dimensional holographic diffraction gratings were made in the PMMA, and its diffraction efficiency was measured as a function of thickness, refractive index change, and reconstruction angle. The efficiencies measured agree fairly well with the theoretical sin2 curve; however, higher peak diffraction efficiencies were obtained further out on this oscillatory curve. A maximum diffraction efficiency of 96% was obtained. Angular sensitivity measurements indicated that the effective thickness of the grating was less than its actual thickness due to the nonuniformity of the index variation with thickness. Potential applications as a dielectric waveguide, diffraction grating, and wavelength selector are discussed. Scattering, the relatively small maximum index change, and poor reproducibility are the chief limiting factors.

© 1973 Optical Society of America

Full Article  |  PDF Article
More Like This
Mechanism of the Photoinduced Refractive Index Increase in Polymethyl Methacrylate

M. J. Bowden, E. A. Chandross, and I. P. Kaminow
Appl. Opt. 13(1) 112-117 (1974)

Single femtosecond pulse holography using polymethyl methacrylate

Yan Li, Kazuhiro Yamada, Tomohiko Ishizuka, Wataru Watanabe, Kazuyoshi Itoh, and Zhongxiang Zhou
Opt. Express 10(21) 1173-1178 (2002)

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 (11)

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

Equations (3)

You do not have subscription access to this journal. Equations 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