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?

Kenneth B Crozier

2019-04-03

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

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

Z Xu, W Song, KB Crozier

2017-10-25

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

Beyond Toroidal Multipoles

Shi-Qiang Li, Kenneth B Crozier

2017-01-01

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

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..

Trapping nanoparticles with plasmonic and photonic nanostructures

Kenneth B Crozier

2017-01-01

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

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..

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..

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

2014-07-21

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