Speckle-based hyperspectral imaging combining multiple scattering and compressive sensing in nanowire mats

Abstract

Encoding of spectral information onto monochrome imaging cameras is of interest for wavelength multiplexing and hyperspectral imaging applications. Here, the complex spatio-spectral response of a disordered material is used to demonstrate retrieval of a number of discrete wavelengths over a wide spectral range. Strong, diffuse light scattering in a semiconductor nanowire mat is used to achieve a highly compact spectrometer of micrometer thickness, transforming different wavelengths into distinct speckle patterns with nanometer sensitivity. Spatial multiplexing is achieved through the use of a microlens array, allowing simultaneous imaging of many speckles, ultimately limited by the size of the diffuse spot area. The performance of different information retrieval algorithms is compared. A compressive sensing algorithm exhibits efficient reconstruction capability in noisy environments and with only a few measurements.

References in corpus (8)

• Measuring the Transmission Matrix in Optics : An Approach to the Study and Control of Light Propagation in Disordered Media
• Image Transmission Through an Opaque Material
• On-Chip Random Spectrometer
• Imaging With Nature: Compressive Imaging Using a Multiply Scattering Medium
• Quantum-Secure Authentication with a Classical Key
• Using a multimode fiber as a high resolution, low loss spectrometer
• High-resolution and broadband all-fiber spectrometers
• Photonic bandgap fiber bundle spectrometer

Cited by in corpus (7)

• Spectral DiffuserCam: lensless snapshot hyperspectral imaging with a spectral filter array
• Deep Learning Enabled Real Time Speckle Recognition and Hyperspectral Imaging using a Multimode Fiber Array
• Imaging of objects through a thin scattering layer using a spectrally and spatially separated reference
• mHealth hyperspectral learning for instantaneous spatiospectral imaging of hemodynamics
• Snapshot fiber spectral imaging using speckle correlations and compressive sensing
• Non-invasive color imaging through scattering medium under broadband illumination
• Recovering the spectral and spatial information of an object behind a scattering media