Self-Assembled Honeycomb Lattices of Dielectric Colloidal Nanospheres Featuring Photonic Dirac Cones
SCIE
SCOPUS
- Title
- Self-Assembled Honeycomb Lattices of Dielectric Colloidal Nanospheres Featuring Photonic Dirac Cones
- Authors
- Yeongha Kim; Stephan Wong; Changwon Seo; YOON, JEONGHOON; Gwan Hyun Choi; Jan Olthaus; Doris E. Reiter; Jeongyong Kim; Pil Jin Yoo; Teun-Teun Kim; Sang Soon Oh; YI, GI RA
- Date Issued
- 2022-03
- Publisher
- American Chemical Society
- Abstract
- The prime example of a two-dimensional photonic crystal featuring Dirac cones is based on the honeycomb lattice. Colloidal self-assembly can produce a two-dimensional colloidal structure over a large area but is limited to hexagonal-close-packed structures. Therefore, it has been challenging to fabricate honeycomb monolayers by colloidal self-assembly. Here, we fabricate a dielectric honeycomb lattice in a large area by template-assisted self-assembly and analyze its photonic structure. Although the Dirac point occurring at the K point is not accessible by light in free space, a part of the upper Dirac cone above the light line is verified by a Fourier analysis of the back-focal-plane image. Because the template-assisted self-assembly enables additional geometrical perturbations in the honeycomb lattice, various lattices can be fabricated. This additional degree of freedom may provide an alternative way of fabricating photonic topological insulators. © 2022 American Chemical Society. All rights reserved.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/116585
- DOI
- 10.1021/acsanm.1c03986
- ISSN
- 2574-0970
- Article Type
- Article
- Citation
- ACS Applied Nano Materials, vol. 5, no. 3, page. 3386 - 3393, 2022-03
- Files in This Item:
- There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.