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A novel multiplexed THz spatial modulator for fast sub-wavelength imaging and spectroscopy

A novel multiplexed THz spatial modulator for fast sub-wavelength imaging and spectroscopy
A novel multiplexed THz spatial modulator for fast sub-wavelength imaging and spectroscopy
We report on the current state of the development of a sub-wavelength THz spatial modulator array - a multi-pixel THz imaging device. The modulator allows fast image acquisition with greatly improved spatial resolution. Additionally, it is expected that the modulator can be used for multiplexed Fourier Transform Spectroscopy enabling micro-spectroscopy characterization of samples within the THz regime.

The device consists of an array of sixteen THz transmission windows (pixels) of sub-wavelength diameter. The transmission of each of the sub-wavelength pixels can be varied electronically allowing amplitude modulation of the THz signal. The complete array of sixteen pixels is frequency multiplexed. The modulator can deliver a 4x4 pixel image within a single integration time of a photodetector. The array is mechanically scanned over the sample, yielding a factor of 16 improvement in the speed of image acquisition in comparison to a single hole, sub-wavelength scanning imaging technique.

Several variants of the device with varying pixel diameters were already fabricated and are currently tested and characterized. As such, we will present and discuss some of the experimental results. These include the characterization of the device within MWIR and LWIR bands as well as some calculations of the device's expected performance within the THz band.
Szelc, Jedrzej
dfb93582-06e6-4848-8fc1-c9547c82c9f7
Rutt, H.N.
e09fa327-0c01-467a-9898-4e7f0cd715fc
Moktadir, Z.
34472668-ffda-4287-8fea-2c4f3bf1e2fa
Szelc, Jedrzej
dfb93582-06e6-4848-8fc1-c9547c82c9f7
Rutt, H.N.
e09fa327-0c01-467a-9898-4e7f0cd715fc
Moktadir, Z.
34472668-ffda-4287-8fea-2c4f3bf1e2fa

Szelc, Jedrzej, Rutt, H.N. and Moktadir, Z. (2009) A novel multiplexed THz spatial modulator for fast sub-wavelength imaging and spectroscopy. 2nd Annual Meeting on THz Measurement Techniques, London, UK. 28 Jun 2009.

Record type: Conference or Workshop Item (Paper)

Abstract

We report on the current state of the development of a sub-wavelength THz spatial modulator array - a multi-pixel THz imaging device. The modulator allows fast image acquisition with greatly improved spatial resolution. Additionally, it is expected that the modulator can be used for multiplexed Fourier Transform Spectroscopy enabling micro-spectroscopy characterization of samples within the THz regime.

The device consists of an array of sixteen THz transmission windows (pixels) of sub-wavelength diameter. The transmission of each of the sub-wavelength pixels can be varied electronically allowing amplitude modulation of the THz signal. The complete array of sixteen pixels is frequency multiplexed. The modulator can deliver a 4x4 pixel image within a single integration time of a photodetector. The array is mechanically scanned over the sample, yielding a factor of 16 improvement in the speed of image acquisition in comparison to a single hole, sub-wavelength scanning imaging technique.

Several variants of the device with varying pixel diameters were already fabricated and are currently tested and characterized. As such, we will present and discuss some of the experimental results. These include the characterization of the device within MWIR and LWIR bands as well as some calculations of the device's expected performance within the THz band.

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More information

Published date: 2009
Venue - Dates: 2nd Annual Meeting on THz Measurement Techniques, London, UK, 2009-06-28 - 2009-06-28

Identifiers

Local EPrints ID: 70937
URI: http://eprints.soton.ac.uk/id/eprint/70937
PURE UUID: dfec1ab6-6408-425a-bd53-3a930cd01eda

Catalogue record

Date deposited: 11 Mar 2010
Last modified: 11 Sep 2020 16:39

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