Enhanced nonlinear optical characteristics of copper-ion-doped double crossover DNAs

Title
Enhanced nonlinear optical characteristics of copper-ion-doped double crossover DNAs
Authors
박병호Byung Jic LeeSreekantha Reddy Dugasani조영호김철기서민아이택진전영민최재빈이석Sung Ha ParkSeong Chan JunDong-Il YeomFabian Rotermund김재헌
Keywords
Optical nonlinearity; Copper-ion-doped DNA; Four wave mixing
Issue Date
2015-10
Publisher
Nanoscale
Citation
VOL 7, 18089-18095
Abstract
The modification of deoxyribonucleic acid (DNA) samples by sequencing the order of bases and doping copper ions opens the possibility for the design of novel nanomaterials exhibiting large optical nonlinearity. We investigated the nonlinear characteristics of copper-ion doped double crossover DNA samples for the first time to the best of our knowledge by using Z-scan and four-wave mixing methods. To accelerate the nonlinear characteristics, we prepared two types of unique DNA nanostructures composed of 148 base pairs doped with copper ions with a facile annealing method. The outstanding third-order nonlinear optical susceptibility of the copper-ion-doped DNA solution, 1.19 × 10−12 esu, was estimated by the conventional Z-scan measurement, whereas the four-wave mixing experiment was also investigated. In the visible spectral range, the copper-ion-doped DNA solution samples provided competent four-wave mixing signals with a remarkable conversion efficiency of −4.15 dB for the converted signal at 627 nm. The interactions between DNA and copper ions contribute to the enhancement of nonlinearity due to structural and functional changes. The present study signifies that the copper-ion-doped double crossover DNA is a potential candidate as a highly efficient novel material for further nonlinear optical applications.
URI
http://pubs.kist.re.kr/handle/201004/50642
ISSN
20403364
Appears in Collections:
KIST Publication > Article
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