Effects Of Profile Replication On Diffraction Anomalies In Multilayer-Overcoated Gratings

L F DeSandre; J. Merle Elson

doi:10.1117/12.945825

14 July 1988 Effects Of Profile Replication On Diffraction Anomalies In Multilayer-Overcoated Gratings

L F DeSandre, J. Merle Elson

Proceedings Volume 0927, Wave Propagation and Scattering in Varied Media; (1988) https://doi.org/10.1117/12.945825
Event: 1988 Technical Symposium on Optics, Electro-Optics, and Sensors, 1988, Orlando, FL, United States

Abstract

An analysis is made of anomalous resonance effects on multilayer-overcoated, low-efficiency gratings using the extinction theorem technique for various degrees of grating replication at overlayer interfaces. For wavelength-to-grating-period ratios such that only the specular and -1 order are reflected from the grating, an enhancement of the 2% nominal efficiency in the -1 order can be realized. Anomalously high diffraction efficiency at resonance, which may exceed 50% in the -1 order, results from the coupling of the incident beam into guided waves supported by the multilayer assembly. Previously, resonance effects were studied assuming perfect replication of the substrate grating profile at each film interface. However, perfect transfer of the grating relief to the film boundaries does not occur in all instances; it depends on the grating and film characteristics as well as the conditions during deposition. In this paper, we investigate the effect of nonreplication of the grating profile at film interfaces on anomalous diffraction, while assuming a transition from trapezoidal profile at the grating substrate to a rounded relief at the top surface of the multilayer structure.

Citation Download Citation

L F DeSandre and J. Merle Elson "Effects Of Profile Replication On Diffraction Anomalies In Multilayer-Overcoated Gratings", Proc. SPIE 0927, Wave Propagation and Scattering in Varied Media, (14 July 1988); https://doi.org/10.1117/12.945825

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

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
8 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Diffraction gratings

Interfaces

Dielectrics

Diffraction

Multilayers

Waveguides

Wave propagation

Show All Keywords

Keywords/Phrases

Search In:

Publication Years