Laser-tweezer-controlled solid immersion microscopy in microfluidic systems

Birkbeck, Aaron L.; Zlatanovic, Sanja; Esener, Sadik C.; Ozkan, Mihrimah

doi:10.1364/ol.30.002712

Cited by 3 publications

(1 citation statement)

References 9 publications

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“…polystyrene (PS) or silica (SiCh) microspheres, in many research areas. Some of the many applications of dielectric microsphere are micro-objective lens [86], solid immersion lens (SIL) [87], hard mask in photolithography [88], and a focusing lens for nanopatterning [89].…”

Section: Optical Nanojetmentioning

confidence: 99%

Near-field Raman microscopy using a dielectric microsphere

Kasim¹

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It has been a long and difficult journey. This thesis would not have been done if not for the following people that have supported and helped me from the start of my candidature. From the bottom of my heart, I would like to sincerely thank them for their support and encouragement. First of all, I would like to express my sincere gratitude and appreciation to my supervisor Prof. Shen Zexiang for his guidance throughout my PhD project. His encouragements and support have kept me going until I reached the finish line. He also constantly reminds me to think positively and creatively, which are very important not only for my research but also for my future career.

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Section: Optical Nanojetmentioning

confidence: 99%

Near-field Raman microscopy using a dielectric microsphere

Kasim¹

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Near-field Raman imaging using optically trapped dielectric microsphere

Kasim¹,

Yu²,

Meng³

et al. 2008

Opt. Express

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The stumbling block of employing Raman imaging in nanoscience and nanotechnology is the diffraction-limited spatial resolution. Several approaches have been employed to improve the spatial resolution, among which aperture and apertureless near-field Raman techniques are the most frequently used. In this letter, we report a new approach in doing near-field Raman imaging with spatial resolution of about 80 nm, by trapping and scanning a polystyrene microsphere over the sample surface in water. We have used this technique to resolve PMOS transistors with SiGe source drain stressors with poly-Si gates, as well as gold nanopatterns with excellent reproducibility.

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A Novel Near-field Raman and White Light Imaging System for Nano Photonic and Plasmonic Studies

et al. 2008

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We show the approaches in achieving high resolution Raman and white light imaging. In Raman imaging, a dielectric microsphere is trapped by the incoming laser, which was focused onto the sample by the microsphere. The microsphere was also used to collect the scattered Raman signals. We show the capability of this method in imaging various types of samples, such as Si devices and gold nanopattern. This method is comparatively easier to perform, better repeatability, and stronger signal than the normal near-field Raman techniques. Besides the Raman imaging, we also show a far-field confocal white light reflection imaging system that can be used for the fast imaging and characterization of nanostructures. This system uses a xenon (Xe) lamp as the incident light source and tunable aperture to enhance the spatial resolution. It has a spatial resolution of around 370 nm at a wavelength of 590 nm. With our system, we can clearly resolve images of 300 nm nanoparticles arranged in 2D honeycomb arrays with a period of 500 nm. Localized surface plasmons (LSPs) of isolated single and dimer gold nanospheres were also studied and the resonance energy difference between their LSPs was extracted.

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Laser-tweezer-controlled solid immersion microscopy in microfluidic systems

Cited by 3 publications

References 9 publications

Near-field Raman microscopy using a dielectric microsphere

Near-field Raman microscopy using a dielectric microsphere

Near-field Raman imaging using optically trapped dielectric microsphere

A Novel Near-field Raman and White Light Imaging System for Nano Photonic and Plasmonic Studies

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