All-angle negative refraction effects and subwavelength imaging in photonic crystals with honeycomb lattice

Karikkuzhi Variyath Ummer; Ramarao Vijaya

doi:10.1117/1.JNP.11.036005

20 July 2017 All-angle negative refraction effects and subwavelength imaging in photonic crystals with honeycomb lattice

Karikkuzhi Variyath Ummer, Ramarao Vijaya

Author Affiliations +

Journal of Nanophotonics, Vol. 11, Issue 3, 036005 (July 2017). https://doi.org/10.1117/1.JNP.11.036005

Abstract

Broadband, all-angle negative refraction (AANR) effects and imaging with subwavelength resolution have been analyzed in a honeycomb lattice of silicon rods in air background, as well as in the inverse structure of air holes in a silicon wafer. In the rod lattice, it was possible to obtain AANR effects for transverse-magnetic (TM) polarization in the second band (TM2) with a bandwidth as large as ∼23% after optimizing the ratio of feature size to the lattice constant as 0.44 and a super-lensing effect with a binary coherent source resolution of 0.68λ. On the other hand, the hole lattice shows AANR for both TM2 (bandwidth of 14%) and TE2 (bandwidth of 15.3%) bands with an additional advantage of polarization-independent AANR of 5% bandwidth. The hole lattice also shows a super-lensing behavior, which helps in imaging with a subwavelength resolution of 0.19λ for a single-point source and 0.80λ with a binary source for TM polarization while it is 0.48λ and 0.97λ, respectively, for transverse-electric (TE) polarization. The conditions for perfect imaging have been studied, and the phenomenon of dual negative refraction for both TE and TM polarization is also discussed.

Citation Download Citation

Karikkuzhi Variyath Ummer and Ramarao Vijaya "All-angle negative refraction effects and subwavelength imaging in photonic crystals with honeycomb lattice," Journal of Nanophotonics 11(3), 036005 (20 July 2017). https://doi.org/10.1117/1.JNP.11.036005

Received: 5 December 2016; Accepted: 28 June 2017; Published: 20 July 2017

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