THz near-field imaging employing synchrotron radiation
- 23 February 2004
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 84 (8) , 1422-1424
- https://doi.org/10.1063/1.1650034
Abstract
Terahertz scanning near-field infrared microscopy below 1 THz is demonstrated at an electron storage ring using coherent synchrotron radiation.Spatial resolution below the diffraction limit down to about λ/40 at 2 cm −1 is derived from the transmittance spectra of a conical aperture probe. The potential of the technique is exemplified by imaging wet biological samples. Strongly absorbing living leaves have been imaged in transmittance with a spatial resolution of 130 μm at about 12 cm −1 . The THz near-field images reveal distinct structural differences in the mesophytic and xerophytic leaves investigated.Keywords
This publication has 17 references indexed in Scilit:
- Terahertz imaging with nanometer resolutionApplied Physics Letters, 2003
- Brilliant, Coherent Far-Infrared (THz) Synchrotron RadiationPhysical Review Letters, 2003
- Materials for terahertz science and technologyNature Materials, 2002
- Steady-State Far-Infrared Coherent Synchrotron Radiation detected at BESSY IIPhysical Review Letters, 2002
- Terahertz dark-field imaging of biomedical tissueOptics Express, 2001
- Collection-mode near-field imaging with 0.5-THz pulsesIEEE Journal of Selected Topics in Quantum Electronics, 2001
- Recent advances in terahertz imagingApplied Physics B Laser and Optics, 1999
- THz near-field imagingOptics Communications, 1998
- T-ray imagingIEEE Journal of Selected Topics in Quantum Electronics, 1996
- Polarised interferometric spectrometry for the millimetre and submillimetre spectrumInfrared Physics, 1970