Phase and absorption metrology for thick photopolymer devices

Amy C. Sullivan; Mark R. Ayres; Robert R. McLeod

doi:10.1117/12.683894

13 September 2006 Phase and absorption metrology for thick photopolymer devices

Amy C. Sullivan, Mark R. Ayres, Robert R. McLeod

Proceedings Volume 6335, Organic Holographic Materials and Applications IV; 633502 (2006) https://doi.org/10.1117/12.683894
Event: SPIE Optics + Photonics, 2006, San Diego, California, United States

Abstract

Studies of development kinetics in volume photopolymers typically use transmission holography to quantify the index distribution. This method has advantages including simplicity, quantitative index data and natural mapping onto theories using harmonic expansion of the material response. A particular disadvantage is that the low spatialfrequency response corresponding to the intensity of the writing beams can never be Bragg matched and thus remains invisible. In configurations where the exposure is not primarily sinusoidal, the holographic method is not applicable. Important examples include bit-oriented data storage, direct-write lithography, and the object beam of page-based holography. In these cases the exposure intensity is essentially arbitrary and there is a need for metrology tools that can quantitatively measure the real and imaginary parts of the weak 3D index perturbation. Images produced by bright-field and phase-contrast microscopes are generally not quantitative and are corrupted by objects out of the focal plane. We have developed two methods, a form of optical diffraction tomography and a scanning transmission microscope, that are specifically designed to measure the 3D index response of holographic materials. Both are optimized to measure the extremely weak absorption and phase structures typical of photopolymers and have passbands that match the expected spatial frequencies.

Citation Download Citation

Amy C. Sullivan, Mark R. Ayres, and Robert R. McLeod "Phase and absorption metrology for thick photopolymer devices", Proc. SPIE 6335, Organic Holographic Materials and Applications IV, 633502 (13 September 2006); https://doi.org/10.1117/12.683894

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available