Gap‐Plasmon Coupled Nanopillar Array to Promote Upconversion Luminescence. (30th October 2020)

• Record Type: Journal Article
• Authors: Jung, Kinam
• Is Part Of: Bulletin of the Korean Chemical Society. Volume 41:Number 12(2020)
• Page Start: 1128
• Page End: 1129
• Publication Date: 2020-10-30
• Subjects: Gap‐plasmon -- Upconversion -- Nanopillar -- FDTD; Chemistry -- Periodicals; 540.5
• DOI: 10.1002/bkcs.12131
• Languages: English
• ISSNs: 0253-2964

Abstract

Abstract : This work theoretically explored the well‐defined nanogap arranged as an upconversion (UC)/gold capping layer photonic nanopillar array on a back‐reflecting film‐coated Si substrate. The gap‐plasmon (GP)‐coupled periodic nanopillar array with encapsulating the upconversion layer (denoted as GPNA) is suggested to promote the upconversion luminescence (UCL) intensity at excitation and emission wavelengths. The optical localized‐plasmon properties of the GPNA platform were probed by finite‐difference time‐domain (FDTD) method. With tweaking the geometric design parameters such as a cap thickness and gap distance, the GPNA platform can induce a prominent GP mode between the UC cap layer, thus leading to the significant plasmon‐driven optical electromagnetic field amplification within the UC layer followed by substantial light absorption and UCL promotion. This proposed GP‐coupled nanopillar array would pave the alternative way for a broad range of plasmon‐sensitized applications which are able to absorb the incident excitation and resultant emission light.