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Simulating Imaging of Large Scale Radio Arrays on the Lunar Surface

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Deconvolution method for two-dimensional spatial-response mapping of lithographic infrared antennas.

J Alda¹, C Fumeaux, I Codreanu

¹School of Optics, University of Central Florida, PO Box 162700, Orlando, Florida 32816-2700, USA. j.alda@fis.ucm.es

|March 8, 2008

Summary

Researchers measured the spatial impulse response of infrared detectors using a focused CO2 laser and deconvolution. The results closely matched simulations of dipole antenna near-field distributions.

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Area of Science:

Optoelectronics
Nanophotonics
Antenna Engineering

Background:

Characterizing the spatial response of infrared detectors is crucial for understanding their performance, especially when their dimensions approach the wavelength of light.
Antenna-coupled detectors offer unique properties for infrared detection but require precise spatial response analysis.

Purpose of the Study:

To experimentally determine the spatial impulse response of antenna-coupled infrared detectors.
To compare experimental measurements with theoretical predictions of near-field antenna behavior.

Main Methods:

Utilized a tightly focused carbon dioxide (CO2) laser beam for a two-dimensional scan of the detector.
Employed an experimental setup with submicrometer resolution.
Applied an iterative deconvolution algorithm to process the scanned data and obtain the spatial impulse response.

Main Results:

Successfully obtained the spatial impulse response of the antenna-coupled infrared detectors.
Demonstrated good agreement between the experimentally measured spatial response and numerically computed near-field distributions of a dipole antenna.

Conclusions:

The developed method accurately characterizes the spatial impulse response of subwavelength infrared detectors.
Experimental validation confirms the theoretical models of dipole antenna near-field behavior in the context of infrared detection.