Methods of controlling grooves profile and the duty cycle of gold transmission phase gratings

Keqiang Qiu; Xiangdong Xu; Ying Liu; Yilin Hong; Shaojun Fu

doi:10.1117/12.757521

4 January 2008 Methods of controlling grooves profile and the duty cycle of gold transmission phase gratings

Keqiang Qiu, Xiangdong Xu, Ying Liu, Yilin Hong, Shaojun Fu

Author Affiliations +

Proceedings Volume 6832, Holography and Diffractive Optics III; 68322L (2008) https://doi.org/10.1117/12.757521
Event: Photonics Asia 2007, 2007, Beijing, China

Abstract

It is known that rectangular grooves profile and various duty cycles (line to pitch) are required to attain maximum efficiency. The gold transmission phase gratings have been fabricated using holography and ion-beam etching techniques. The latent image monitoring technique and real time end-point detection technique were utilized to improve control of the shape of grooves and duty cycle during exposure and development, respectively. It is difficult to produce gratings with larger duty cycle in photoresist on gold for standing wave, nevertheless it is revealed in our work that the duty cycle can be more than 0.4 for the case for photoresist on gold substrates if development is stopped where the slope of the monitoring curve begins to drop off, not at the peak of the diffracted signal. In ion-beam milling, the influence of redeposition on the shape of grooves and duty cycle has been overcome by using a thin mask of Chromium with a comparatively low ion-etch rate and tilting and rotating substrates beneath the ion beam. Finally, some gold phase gratings with the duty cycles in the range of 0.25-0.45 have been obtained, whose duty cycle value is about 0.45, and their grooves profile is trapezoidal profile whose left and right facets are both more than 83 degrees approximately.

Citation Download Citation

Keqiang Qiu, Xiangdong Xu, Ying Liu, Yilin Hong, and Shaojun Fu "Methods of controlling grooves profile and the duty cycle of gold transmission phase gratings", Proc. SPIE 6832, Holography and Diffractive Optics III, 68322L (4 January 2008); https://doi.org/10.1117/12.757521

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
7 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Gold

Photoresist materials

Photoresist developing

Ion beams

Chromium

Etching

Reflectivity

Show All Keywords

Keywords/Phrases

Search In:

Publication Years