Acousto‐optic spectrum analyzer for plasma diagnostics

Experimental considerations for 2-D acoustooptic spectrum analysis.

A 2-D acoustooptic spectrum analyzer with the associated reference function generator and real-time image processor has been constructed. The operation of the analyzer and the experimental considerations for obtaining a high resolution spectrum in real time are described.

Optical Complex Spectrum Analyzer

A 1024-sample serum analyzer chip for cancer diagnostics.

We present a platform that combines microarrays and microfluidic techniques to measure four protein biomarkers in 1024 serum samples for a total of 4096 assays per device. Detection is based on a surface fluorescence sandwich immunoassay with a limit of detection of ~1 pM for most of the proteins measured: PSA, TNF-α, IL-1β, and IL-6. To validate the utility of our platform, we measured these f...

Optical Complex Spectrum Analyzer (OCSA)

Nonlinear single-spin spectrum analyzer.

Qubits have been used as linear spectrum analyzers of their environments. Here we solve the problem of nonlinear spectral analysis, required for discrete noise induced by a strongly coupled environment. Our nonperturbative analytical model shows a nonlinear signal dependence on noise power, resulting in a spectral resolution beyond the Fourier limit as well as frequency mixing. We develop a noi...