124 citations · 198 across the 14 of their papers we have counts for
14 papers
Energy Absorption Interferometry
Stafford Withington, Willem Jellema
Energy Absorption Interferometry (EAI) is a technique for measuring the responsivities and complex-valued spatial polarimetric forms of the individual degrees of freedom through wh…
Applying Energy Absorption Interferometry to THz direct detectors using photomixers
Ian Veenendaal, Edgar Castillo-Dominguez, Stephen J. C. Yates +2
Detector requirements for far infrared astronomy generally result in devices which exhibit a few-moded response to incident radiation. The sensitivity and spatial form of the indiv…
Compact Metasurface Terahertz Spectrometer
Wenye Ji, Jin Chang, Behnam Mirzaei +7
The electromagnetic spectrum in the terahertz frequency region is of significant importance for understanding the formation and evolution of galaxies and stars throughout the histo…
Modal Simulation Framework for the Design and Verification of Future Few-Mode Far-Infrared Spectrometers
B. N. R. Lap, W. Jellema, S. Withington +1
Future far-infrared space missions require highly-sensitive spectroscopy as a primary diagnostics tool. However, these systems are sensitive to straylight, due to the ultra-sensiti…
The MICADO Atmospheric Dispersion Corrector: Optomechanical design, expected performance and calibration techniques
J. A. van den Born, R. Romp, A. W. Janssen +5
The differential refraction of light passing through the atmosphere can have a severe impact on image quality if no atmospheric dispersion corrector (ADC) is used. For the Extremel…
Modelling the Partially Coherent Behaviour of Few-Mode Far-Infrared Grating Spectrometers
B. N. R. Lap, S. Withington, W. Jellema +1
Modelling ultra-low-noise far-infrared grating spectrometers has become crucial for the next generation of far-infrared space observatories. Conventional techniques are awkward to…
Demonstration of an imaging technique for the measurement of PSF elongation caused by Atmospheric Dispersion
J. A. van den Born, W. Jellema, E. Dijkstra
Elongation of the point spread function due to atmospheric dispersion becomes a severe problem for high resolution imaging instruments, if an atmospheric dispersion corrector is no…
Calibration strategy for the SPICA/SAFARI instrument
Russell F. Shipman, Bart Vandenbussche, Edgar Castillo-Dominguez +3
SPICA is a mid to far infra-red space mission to explore the processes that form galaxies, stars and planets. SPICA/SAFARI is the far infrared spectrometer that provides near-backg…
A Fourier optics approach to evaluate the astrometric performance of MICADO
J. A. van den Born, W. Jellema, R. Navarro +3
We present our investigation into the impact of wavefront errors on high accuracy astrometry using Fourier Optics. MICADO, the upcoming near-IR imaging instrument for the Extremely…
Complex beam mapping and Fourier optics analysis of a wide field Microwave Kinetic Inductance Detector camera
S. J. C. Yates, K. K. Davis, W. Jellema +2
For astronomical instruments, accurate knowledge of the optical pointing and coupling are essential to characterize the alignment and performance of (sub-)systems prior to integrat…
Analysis techniques for complex-field radiation pattern measurements
Kristina K. Davis, Willem Jellema, Stephen J. C. Yates +3
Complex field measurements are increasingly becoming the standard for state-of-the-art astronomical instrumentation. Complex field measurements have been used to characterize a sui…
SPICA - a large cryogenic infrared space telescope Unveiling the obscured Universe
P. R. Roelfsema, H. Shibai, L. Armus +66
Measurements in the infrared wavelength domain allow us to assess directly the physical state and energy balance of cool matter in space, thus enabling the detailed study of the va…
Surface wave control for large arrays of microwave kinetic inductance detectors
Stephen J. C. Yates, Andrey M. Baryshev, Ozan Yurduseven +8
Large ultra-sensitive detector arrays are needed for present and future observatories for far infra-red, submillimeter wave (THz), and millimeter wave astronomy. With increasing ar…
Herschel-HIFI observations of high-J CO lines in the NGC 1333 low-mass star-forming region
U. A. Yıldız, E. F. van Dishoeck, L. E. Kristensen +60
Herschel-HIFI observations of high-J lines (up to J_u=10) of 12CO, 13CO and C18O are presented toward three deeply embedded low-mass protostars, NGC 1333 IRAS 2A, IRAS 4A, and IRAS…