Non-invasive, near-field terahertz imaging of hidden objects using a single pixel detector
arXiv:1509.03138 · doi:10.1126/sciadv.1600190
Abstract
Terahertz (THz) imaging has the ability to see through otherwise opaque materials. However, due to the long wavelengths of THz radiation (λ=300μm at 1THz), far-field THz imaging techniques are heavily outperformed by optical imaging in regards to the obtained resolution. In this work we demonstrate near-field THz imaging with a single-pixel detector. We project a time-varying optical mask onto a silicon wafer which is used to spatially modulate a pulse of THz radiation. The far-field transmission corresponding to each mask is recorded by a single element detector and this data is used to reconstruct the image of an object placed on the far side of the silicon wafer. We demonstrate a proof of principal application where we image a printed circuit board on the underside of a 115μm thick silicon wafer with ~100μm (λ/4) resolution. With subwavelength resolution and the inherent sensitivity to local conductivity provided by the THz probe frequencies, we show that it is possible to detect fissures in the circuitry wiring of a few microns in size. Imaging systems of this type could have other uses where non-invasive measurement or imaging of concealed structures with high resolution is necessary, such as in semiconductor manufacturing or in bio-imaging.
References in corpus (3)
Cited by in corpus (31)
- Hyperspectral terahertz microscopy via nonlinear ghost imaging
- Mid-infrared single-pixel imaging at the single-photon level
- Ultra-high-speed Terahertz Imaging Using Atomic Vapour
- Spintronic Sources of Ultrashort Terahertz Electromagnetic Pulses
- Spatial Sampling of Terahertz Fields with Sub-wavelength Accuracy via Probe Beam Encoding
- Silicon-plasmonic integrated circuits for terahertz signal generation and coherent detection
- Rapid Sensing of Hidden Objects and Defects using a Single-Pixel Diffractive Terahertz Processor
- Neutron Ghost Imaging
- Broadband high-resolution terahertz single-pixel imaging
- Fourier single-pixel imaging in the terahertz regime
- Video-speed Graphene Modulator Arrays for Terahertz Imaging Applications
- Time-domain terahertz compressive imaging
- Subwavelength THz imaging of graphene photoconductivity
- Polarization-multiplexing ghost imaging
- Deterministic Terahertz wave control in scattering media
- Very-Large-Scale Reconfigurable Intelligent Surfaces for Dynamic Control of Terahertz and Millimetre Waves
- Image watermarking and fusion based on Fourier single-pixel imaging with weighed light source
- Optimizing illumination patterns for classical ghost imaging
- Ghost translation
- Increase the frame rate of a camera via temporal ghost imaging
- Increasing the resolution of transmission electron microscopy by computational ghost imaging
- Enhancement of spatial resolution of ghost imaging via localizing and thresholding
- Deep Learning Empowered Sub-Diffraction Terahertz Backpropagation Single-Pixel Imaging
- Single-pixel imaging via data-driven and deep image prior dual networks
- 3D Fourier ghost imaging via semi-calibrated photometric stereo
- Temporally and Spatially variant-resolution illumination patterns in computational ghost imaging
- Compact Multi-Spectral Pushframe Camera for Nano-Satellites
- Multi-wavelength ghost imaging: a review
- Ghost spintronic THz-emitter-array microscope
- Breaking Imaging Limits using Dithering Masks in 0.35 Terahertz Single-Pixel Imaging
- Optimization of retina-like illumination patterns in ghost imaging