Advancing the Frontiers of Imaging Through Optical Micro- And Nanostructures

Long-wave infrared magnetic mirror based on Mie resonators on conductive substrate

Ming Ye, Shi-Qiang Li, Yang Gao, Kenneth B Crozier

2020-01-20

Metal films are often used in optoelectronic devices as mirrors and/or electrical contacts. In many such devices, however, the π-p..

Quo vadis, plasmonic optical tweezers?

KB Crozier

2019-12-01

Conventional optical tweezers based on traditional optical microscopes are subject to the diffraction limit, making the precise tr..

Beyond toroidal multipoles

SQ Li, KB Crozier

2017-10-25

We propose to separate out the toroidal multipoles in the polar coordinates that is simpler than previous methods done in the Cart..

Trapping nanoparticles with plasmonic and photonic nanostructures

KB Crozier

2017-10-25

We describe optical trapping with plasmonics and with silicon photonics. We furthermore describe recent work in which fluorescence..

Direct observation of optical trapping of a single quantum dot with an all-silicon nanoantenna

Z Xu, W Song, KB Crozier

2017-01-01

Silicon nanoantennas are used to optically trap individual streptavidin-coated CdSe/ZnS quantum dots (QDs) with minimal thermal ef..

Optical trapping using all-dielectric silicon nanoantennas with ultra-low heat generation

Zhe Xu, Wuzhou Song, Kenneth B Crozier

2017-01-01

Silicon nanoantennas are used to trap polystyrene nanospheres (20 nm diameter). Fluorescence microscopy is used to monitor trapped..

Vividly-colored silicon metasurface based on collective electric and magnetic resonances

W Song, S Li, KB Crozier

2016-01-07

We fabricate a silicon nanorod-based metasurface that shows vivid colors. Each nanorod supports electric and magnetic dipole modes..

Highly Directional Fluorescent Emission at Visible Wavelengths with a Silicon Metasurface

W Song, S LI, K Crozier

2016-01-01

We experimentally demonstrate, for the first time to our knowledge, highly-directional fluorescence emission at visible wavelength..

Sensing pH in a microfluidic channel with a lab-on-a-smartphone fluorescence spectrometer

J Chen, R Wang, A Renganathan, A Rattan, X Meng, RR Unnithan, KB Crozier

2016-01-01

We demonstrate a smartphone unit for measuring pH. The dye-mixed sample is input to a microfluidic chip and inserted into the unit..

Germanium nanowires as spectrally-selective photodetectors in the visible-to-infrared

A Solanki, H Park, KB Crozier

2015-05-04

We experimentally demonstrate arrays of vertical Ge nanowires as spectrally-selective photodetectors at visible to infrared wavele..