مشخصات پژوهش

عنوان	Control of surface plasmon resonances in dielectrically-coated proximate gold nanoparticles immobilized on a substrate
نوع پژوهش	مقاله چاپ‌شده در مجلات علمی
کلیدواژه‌ها	optical-plasmon resonance, gold-nanoparticle , optical waveguides,discrete-dipole approximation
چکیده	We present experimental and theoretical results for the changes in the optical-plasmon resonance of gold-nanoparticle dimers immobilized on a surface when coated with an organic, dielectric material. The plasmon band of a nanoparticle dimer shifts to a higher wavelength when the distance between neighboring particles is decreased, and a well-separated second peak appears. This phenomenon is called cross-talk. We find that an organic coating lets cross-talk start at larger separation distances than for uncoated dimers by bridging the gap between immobilized nanoparticles (creating optical clusters). We study this optical clustering effect as a function of the polarization of the applied light, of the inter-particle distance, of the surrounding environment, and of the optical properties of the coating layer. Theoretical discrete-dipole approximation calculations support the experimental absorption spectroscopy results of gold nanoparticles on glass substrates and on optical waveguides
پژوهشگران	سیلویا میتلر (نفر ششم به بعد)، چیترا رانگان (نفر ششم به بعد)، ولکر بوهمر (نفر ششم به بعد)، گانا پودوپریگوریانا (نفر ششم به بعد)، عبدالله حسن زاده (نفر پنجم)، تورج معنی فر (نفر چهارم)، سونگ بو خیو (نفر سوم)، اسد رضایی (نفر دوم)، پاتریک روونی (نفر اول)