Continuous achromatic flat subwavelength grating lens over whole visible bandwidths

Mao Ye; Vishva Ray; Yasha Yi

doi:10.1117/12.2508863

4 March 2019 Continuous achromatic flat subwavelength grating lens over whole visible bandwidths

Mao Ye, Vishva Ray, Yasha Yi

Proceedings Volume 10928, High Contrast Metastructures VIII; 109280I (2019) https://doi.org/10.1117/12.2508863
Event: SPIE OPTO, 2019, San Francisco, California, United States

Abstract

One of the major challenges for emerging planar subwavelength micro lens/metasurfaces is the significant chromatic behavior due to phase mismatch of subwavelength phase shifters. In this work, the continuous achromatic micro lens covering the whole visible wavelength is demonstrated for the first time based on relatively low index contrast gratings. Based on the unique chromatic phase shift behavior of polymer nano structure, we have designed and fabricated a broadband continuous subwavelength achromatic microlens that can cover 250 nm of visible bandwidths (from 435 nm to 685 nm) with focal shift less than 5%. Our works represent the first time to design, fabricate and characterize micro scale lens (7 microns in size) promising for compact integrated nanophotonic devices on chip. There are many advantages of using a polymer based micro lens such as easy fabrication on flexible substrate and potential applications including imaging, spectroscopy, lithography, laser fabrication and future integrated wearable devices.

Conference Presentation

Citation Download Citation

Mao Ye, Vishva Ray, and Yasha Yi "Continuous achromatic flat subwavelength grating lens over whole visible bandwidths", Proc. SPIE 10928, High Contrast Metastructures VIII, 109280I (4 March 2019); https://doi.org/10.1117/12.2508863

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