Modeling of millimetre-wave and terahertz imaging systems

Marcin Lukasz Gradziel; David White; Neal Trappe D.D.S.; Ronan J. Mahon; Timothy J. Finn; Stafford Withington; Anthony Murphy; Creidhe M. O'Sullivan

doi:10.1117/12.578674

8 December 2004 Modeling of millimetre-wave and terahertz imaging systems

Marcin Lukasz Gradziel, David White, Neal Trappe D.D.S., Ronan J. Mahon, Timothy J. Finn, Stafford Withington, Anthony Murphy, Creidhe M. O'Sullivan

Author Affiliations +

Proceedings Volume 5619, Passive Millimetre-Wave and Terahertz Imaging and Technology; (2004) https://doi.org/10.1117/12.578674
Event: European Symposium on Optics and Photonics for Defence and Security, 2004, London, United Kingdom

Abstract

In order to improve the design and analyse the performance of efficient terahertz optical systems, novel quasi-optical components along with dedicated software tools are required. At sub-millimetre wavelengths, diffraction dominates the propagation of radiation within quasi-optical systems and conventional geometrical optics techniques are not adequate to accurately guide the beams or assess optical efficiency. In fact, in general Optical design in the terahertz waveband suffers from a lack of dedicated commercial software packages for modelling the range of electromagnetic propagation regimes that are important in such systems. In this paper we describe the physical basis for efficient CAD software tools we are developing to specifically model long wavelength systems. The goal is the creation of a user-friendly package for optical engineers allowing potential systems to be quickly simulated as well as also providing an analytical tool for verification of existing optical systems. The basic approach to modelling such optical trains is the application of modal analysis e.g. [1][2], which we have extended to include scattering at common off-axis conic reflectors. Other analytical techniques are also ncluded within the CAD software framework such as plane wave decomposition and full physical optics. We also present preliminary analytical methods for characterising standing waves that can occur in terahertz systems and report on novel binary optical components for this wavelength range. Much of this development work has been applied to space instrumentation but is relevant for all Terahertz Imaging systems.

Citation Download Citation

Marcin Lukasz Gradziel, David White, Neal Trappe D.D.S., Ronan J. Mahon, Timothy J. Finn, Stafford Withington, Anthony Murphy, and Creidhe M. O'Sullivan "Modeling of millimetre-wave and terahertz imaging systems", Proc. SPIE 5619, Passive Millimetre-Wave and Terahertz Imaging and Technology, (8 December 2004); https://doi.org/10.1117/12.578674

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available