Diffractive optical elements for multi-dimensional subdiffraction-limit spot generation: design, demonstration, and characterization

Yusuke Ogura; Jun Tanida

doi:10.1117/12.2245646

31 October 2016 Diffractive optical elements for multi-dimensional subdiffraction-limit spot generation: design, demonstration, and characterization

Yusuke Ogura, Jun Tanida

Author Affiliations +

Proceedings Volume 10021, Optical Design and Testing VII; 1002105 (2016) https://doi.org/10.1117/12.2245646
Event: SPIE/COS Photonics Asia, 2016, Beijing, China

Abstract

We present diffractive optical elements (DOEs) for generating wavelength-multiplexing and three-dimensional (multi-dimensional) arrays of spots that are smaller than the single diffraction limit spot. Such small spots are referred to as subdiffraction-limit spots. This method is based on the use of propagating light, and its superior features, including spatial parallelism and remote accessibility to matter, can be utilized in applications. In design, special constraints are introduced into the Gerchberg-Saxton algorithm to control the phases of spots and to disperse light energy to a surrounding area. In each iteration, the phase distribution of a wavelength- multiplexing DOE is synthesized from the phase distributions obtained tentatively for the individual wavelengths. As an example, a two-wavelength two-plane DOE was investigated. The design result showed that expected spot arrays were generated for two wavelengths on the individual output planes. We constructed an experimental system with a spatial light modulator and demonstrated that the generated spot arrays were in conformity with the design result. Spot sizes were reduced to about 80% of that of the diffraction limit spot. Characteristics of this type of DOEs were also evaluated by numerical calculation. For example, the result shows that the depth of focus is extended in subdiffraction-limit spot generation. We believe that this study contributes to expand application fields of DOEs.

Citation Download Citation

Yusuke Ogura and Jun Tanida "Diffractive optical elements for multi-dimensional subdiffraction-limit spot generation: design, demonstration, and characterization", Proc. SPIE 10021, Optical Design and Testing VII, 1002105 (31 October 2016); https://doi.org/10.1117/12.2245646

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

Diffractive optical elements

Diffraction

Light wave propagation

Optical design

Beam splitters

Multiplexing

Modulation

Show All Keywords

Keywords/Phrases

Search In:

Publication Years