Coordination between Surface Lattice Resonances of Poly(glycidyl Methacrylate) Line Array and Surface Plasmon Resonances of CdS Quantum on Silicon Surface

In this work, a unique hybrid system is proposed for one-dimensional gratings comprising of poly(glycidyl methacrylate) (PGMA) brushes and CdS quantum dots (CQDs). Generally, the emission of QDs is too weak to be observed in a dry state. Plasmonic resonances of the grating structures can be used to...

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Bibliographic Details
Published in:Polymers 2019-03, Vol.11 (3), p.558
Main Authors: Su, Shuenn-Kung, Lin, Feng-Ping, Huang, Chih-Feng, Lu, Chien-Hsing, Chen, Jem-Kun
Format: Article
Language:English
Subjects:
Absorptance
Absorption
Absorptivity
Arrays
Cadmium sulfide
Current carriers
Hybrid systems
Investigations
Irradiation
Light emission
Optical properties
Optoelectronics
Photoluminescence
Photoresists
Plasma etching
Plasmonics
Polymerization
Polymers
Quantum dots
Silicon wafers
Solvents
Surface chemistry
Surface plasmon resonance
Vacuum distillation
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Summary:In this work, a unique hybrid system is proposed for one-dimensional gratings comprising of poly(glycidyl methacrylate) (PGMA) brushes and CdS quantum dots (CQDs). Generally, the emission of QDs is too weak to be observed in a dry state. Plasmonic resonances of the grating structures can be used to enhance the light emission or absorption of CQDs. The interaction between PGMA plasmonic nanostructures and inorganic CQDs plays a crucial role in engineering the light harvest, notably for optoelectronic applications. Extinction measurements of the hybrid system consisting of a PGMA grating and CQDs are reported. We designed one-dimensional gratings with various resolutions to tune the absorptance peaks of grating. PGMA grating grafted from a 1.5 µm resolution of trench arrays of photoresist exhibited absorptance peak at 395 nm, close to the absorption peak of CQDs, resulting in the photoluminescence enhancement of CQDs on the grating due to high charge carriers' recombination rate. Generally, the emission of quantum dots occurs under irradiation at characteristic wavelengths. Immobilizing QDs on the grating facilitates the emission of QDs under irradiation of full-wavelength light. Furthermore, the PGMA gratings with CQDs were immersed in various solvents to change the geometries resulting the shift of absorptance peak of grating. The proposed method could be applied for sensing the nature of the surrounding media and vice versa, as well as for various media of solvents.
ISSN:2073-4360
2073-4360
DOI:10.3390/polym11030558