Article

Giovannacci, D., Chung, H.-C., Walker, G. C., Bowen, J. W., Martos-Levif, D., Brissaud, D., Cristofol, L. and Melinge, Y. (2019) Time-domain imaging system in the terahertz range for immovable cultural heritage materials. Strain, 55 (2). e12292. ISSN 1475-1305 doi: https://doi.org/10.1111/str.12292

Dong, J., Jackson, J. B., Melis, M., Giovanacci, D., Walker, G. C., Locquet, A., Bowen, J. W. and Citrin, D. S. (2016) Terahertz frequency-wavelet domain deconvolution for stratigraphic and subsurface investigation of art painting. Optics Express, 24 (23). pp. 26972-26985. ISSN 1094-4087 doi: https://doi.org/10.1364/OE.24.026972

Bowen, J. W., Owen, T., Jackson, J. B., Walker, G. C., Roberts, J. F., Martos-Levif, D., Lascourrèges, P., Giovannacci, D. and Detalle, V. (2015) Cyclododecane as a contrast improving substance for the terahertz imaging of artworks. IEEE Transactions on Terahertz Science and Technology, 5 (6). pp. 1005-1011. ISSN 2156-342X doi: https://doi.org/10.1109/TTHZ.2015.2476666

Galvão, R. K. H., Kienitz, K. H., Hadjiloucas, S. ORCID: https://orcid.org/0000-0003-2380-6114, Walker, G., Bowen, J., Soares, S. F. C. and Araújo, M. C. U. (2013) Multivariate analysis of the dielectric response of materials modeled using networks of resistors and capacitors. IEEE Transactions on Dielectrics and Electrical Insulation, 20 (3). pp. 995-1008. ISSN 1070-9878 doi: https://doi.org/10.1109/TDEI.2013.6518970

Bowen, J. W., Hadjiloucas, S. ORCID: https://orcid.org/0000-0003-2380-6114, Walker, G. C., Hüebers, H.-W. W. and Schubert, J. (2013) Interferometric technique for measuring terahertz antenna phase patterns. IEEE Sensors Journal, 13 (1). pp. 100-110. ISSN 1530-437X doi: https://doi.org/10.1109/JSEN.2012.2226714

Hadjiloucas, S. ORCID: https://orcid.org/0000-0003-2380-6114, Walker, G. C. and Bowen, J. W. (2013) One-port de-embedding technique for the quasi-optical characterization of integrated components. IEEE Sensors Journal, 13 (1). pp. 111-123. ISSN 1530-437X doi: https://doi.org/10.1109/JSEN.2012.2226713

Walker, G. C., Bowen, J. W., Matthews, W. ORCID: https://orcid.org/0000-0002-7408-6885, Roychowdhury, S., Labaune, J., Mourou, G., Menu, M., Hodder, I. and Jackson, J. B. (2013) Sub-surface terahertz imaging through uneven surfaces: visualizing Neolithic wall paintings in Çatalhöyük. Optics Express, 21 (7). pp. 8126-8134. ISSN 1094-4087 doi: https://doi.org/10.1364/OE.21.008126

Walker, G. C., Bowen, J. W., Labaune, J., Jackson, J.-B., Hadjiloucas, S. ORCID: https://orcid.org/0000-0003-2380-6114, Roberts, J., Mourou, G. and Menu, M. (2012) Terahertz deconvolution. Optics Express, 20 (25). pp. 27230-27241. ISSN 1094-4087 doi: https://doi.org/10.1364/OE.20.027230

Shaver, A., Hadjiloucas, S. ORCID: https://orcid.org/0000-0003-2380-6114, Walker, G.C. and Bowen, J.W. (2012) Femtosecond pulse shaping using differential evolutionary algorithm and wavelet operators. Electronics Letters, 48 (21). pp. 1357-1358. ISSN 0013-5194 doi: https://doi.org/10.1049/el.2012.2292

Jackson, J. B., Bowen, J., Walker, G., Labaune, J., Mourou, G., Menu, M. and Fukunaga, K. (2011) A survey of terahertz applications in cultural heritage conservation science. IEEE Transactions on Terahertz Science and Technology, 1 (1). pp. 220-231. ISSN 2156-342X doi: https://doi.org/10.1109/TTHZ.2011.2159538

Walker, G. C., Bowen, J. W., Naftaly, M. and Dudley, R. A. (2011) A simple fluid cell for the study of aqueous solutions using THz time-domain spectroscopy. Measurement Science & Technology, 22 (3). 037003. ISSN 0957-0233 doi: https://doi.org/10.1088/0957-0233/22/3/037003

Hadjiloucas, S. ORCID: https://orcid.org/0000-0003-2380-6114, Walker, G.C. and Bowen, J. (2011) Extending Murty interferometry to the Terahertz part of the spectrum. Journal of Physics: Conference Series, 307. 012040. ISSN 1742-6588 doi: https://doi.org/10.1088/1742-6596/307/1/012012

Hadjiloucas, S. ORCID: https://orcid.org/0000-0003-2380-6114, Walker, G.C., Bowen, J.W. and Galvão, R.K.H. (2011) System identification algorithms for the analysis of dielectric responses from broadband spectroscopies. Journal of Physics: Conference Series, 310. 012002. ISSN 1742-6588 doi: https://doi.org/10.1088/1742-6596/310/1/012002

Hadjiloucas, S. ORCID: https://orcid.org/0000-0003-2380-6114, Walker, G.C., Bowen, J.W., Becerra, V.M., Zafiropoulos, A. and Galvão, R.K.H. (2009) High signal to noise ratio THz spectroscopy with ASOPS and signal processing schemes for mapping and controlling molecular and bulk relaxation processes. Journal of Physics Conference Series, 183. 012003. ISSN 1742-6588 doi: https://doi.org/10.1088/1742-6596/183/1/012003

Hadjiloucas, S. ORCID: https://orcid.org/0000-0003-2380-6114, Franklin, T., Becerra, V. M., Walker, G. C. and Bowen, J. W. (2009) Optimising the feedback loop of a millimetre-wave absolute photoacoustic power meter using H-infinity control synthesis. Journal of Physics : Conference Series , 178 (1). p. 12042. ISSN 1742-6588 doi: https://doi.org/10.1088/1742-6596/178/1/012042

Hadjiloucas, S. ORCID: https://orcid.org/0000-0003-2380-6114, Walker, G. C., Bowen, J. W. and Karatzas, L. S. (2009) Performance limitations of piezoelectric and force feedback electrostatic transducers in different applications. Journal of Physics: Conference Series, 178 (1). 012036. ISSN 1742-6588 doi: https://doi.org/10.1088/1742-6596/178/1/012036

Hadjiloucas, S. ORCID: https://orcid.org/0000-0003-2380-6114, Walker, G. C., Bowen, J. W. and Zafiropoulos, A. (2009) Propagation of errors from a null balance terahertz reflectometer to a sample's relative water content. Journal of Physics: Conference Series, 178 (1). 012012. ISSN 1742-6588 doi: https://doi.org/10.1088/1742-6596/178/1/012012

Galvão, R. K. H., Hadjiloucas, S. ORCID: https://orcid.org/0000-0003-2380-6114, Zafiropoulos, A., Walker, G. C., Bowen, J. W. and Dudley, R. (2007) Optimization of apodization functions in terahertz transient spectrometry. Optics Letters, 32 (20). pp. 3008-3010. ISSN 0146-9592

Walker, G. C., Berry, E., Smye, S. W. and Brettle, D. S. (2004) Materials for phantoms for terahertz pulsed imaging. Physics in Medicine and Biology, 49 (21). N363-N369. ISSN 1361-6560 doi: https://doi.org/10.1088/0031-9155/49/21/N01

Walker, G. C., Berry, E., Smye, S. W., Zinov'ev, N. N., Fitzgerald, A. J., Miles, R. E., Chamberlain, M. and Smith, M. A. (2004) Modelling the propagation of terahertz radiation through a tissue simulating phantom. Physics in Medicine and Biology, 49 (10). pp. 1853-1864. ISSN 1361-656) doi: https://doi.org/10.1088/0031-9155/49/10/002

Berry, E., Walker, G. C., Fitzgerald, A. J., Zinov’ev, N. N., Chamberlain, M., Smye, S. W., Miles, R. E. and Smith, M. A. (2003) Do in vivo terahertz imaging systems comply with safety guidelines? Journal of Laser Applications, 15 (3). pp. 192-198. ISSN 1042-346X doi: https://doi.org/10.2351/1.1585079

Walker, G. C., Berry, E., Smye, S.W., Zinov'ev, N.N., Fitzgerald, A.J., Miles, R.E., Chamberlain, M. and Smith, M.A. (2003) Two methods for modelling the propagation of terahertz radiation in a layered structure. Journal of Biological Physics, 29 (2-3). pp. 141-148. ISSN 0092-0606 doi: https://doi.org/10.1023/A:1024484523964

Fitzgerald, A. J., Berry, E., Zinovev, N. N., Walker, G. C., Smith, M. A. and Chamberlain, J. M. (2002) An introduction to medical imaging with coherent terahertz frequency radiation. Physics in Medicine and Biology, 47 (7). R67-R84. ISSN 1361-6560 doi: https://doi.org/10.1088/0031-9155/47/7/201

Book or Report Section

Jackson, J. B., Labaune, J., Mourou, G. A., Duling, I. N., Walker, G., Bowen, J. and Menu, M. (2011) Terahertz pulse imaging of stratified architectural materials for cultural heritage studies. In: Pezzati, L. and Salimbeni, R. (eds.) SPIE Proceedings: O3A: Optics for Arts, Architecture, and Archaeology III. SPIE. doi: https://doi.org/10.1117/12.888730

Walker, G. C., Bowen, J. W., Hadjiloucas, S. ORCID: https://orcid.org/0000-0003-2380-6114, Zafiropoulos, A., Hadlington, T. and Chamberlain, J. M. (2007) Quantification of boundary definition using pulsed terahertz radiation for wedged geometries. In: 2007 Joint 32nd International Conference on Infrared and Millimeter Waves and 15th International Conference on Terahertz Electronics, Vols 1 and 2. IEEE, New York, pp. 512-513. ISBN 9781424414383

Bowen, J. W., Walker, G. C. and Hadjiloucas, S. ORCID: https://orcid.org/0000-0003-2380-6114 (2007) Sample-induced beam distortions in terahertz time domain spectroscopy and imaging systems. In: 2007 Joint 32nd International Conference on Infrared and Millimeter Waves and 15th International Conference on Terahertz Electronics, Vols 1 and 2. IEEE, New York, pp. 208-209. ISBN 9781424414383

Zafiropoulos, A., Hadjiloucas, S. ORCID: https://orcid.org/0000-0003-2380-6114, Walker, G. C., Bowen, J. W. and Dudley, R. (2007) Towards a THz osmometer. In: 2007 Joint 32nd International Conference on Infrared and Millimeter Waves and 15th International Conference on Terahertz Electronics, Vols 1 and 2. UNSPECIFIED, New York, pp. 295-296. ISBN 9781424414383

Bowen, J. W., Walker, G. C., Hadjiloucas, S. ORCID: https://orcid.org/0000-0003-2380-6114 and Berry, E. (2004) The consequences of diffractively spreading beams in ultrafast THz spectroscopy. In: Thumm, M. and Wiesbeck, W. (eds.) Conference Digest of the 2004 Joint 29th International Conference on Infrared and Millimeter Waves and 12th International Conference on Terahertz Electronics. IEEE, New York, pp. 551-552. ISBN 0780384903

Conference or Workshop Item

Roberts, J., Bowen, J., Brazier, J. ORCID: https://orcid.org/0000-0002-4952-584X, Lonnen, E. and Walker, G. (2014) Discerning the conformation of G-quadruplex forming DNA. In: 4th EOS Topical Meeting on Terahertz Science & Technology, 2014, Camogli, Italy.

Jackson, J. B., Walker, G., Roberts, J., Pike, A., De Talle, V., Giovannacci, D., Mourou, G., Menu, M. and Bowen, J. (2014) Terahertz pulse investigation of paleolithic wall etchings. In: 39th Int. Conf. on Infrared, Millimeter, and THz Waves (IRMMW-THz),, September 14-19, 2014, Tucson, Arizona, USA,. doi: https://doi.org/10.1109/IRMMW-THz.2014.6956054

Bowen, J., Walker, G., Roychowdhury, S., Jackson, J. B., Roberts, J. F., Matthews, W., Labaune, J., Mourou, G., Menu, M. and Hodder, I. (2013) Image retrieval techniques for THz applications in cultural heritage. In: 38th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz),, 1-6 Sept. 2013, Mainz, pp. 1-2. doi: https://doi.org/10.1109/IRMMW-THz.2013.6665890

Pezzati, L., Walker, G., Jackson, J. B., Giovannacci, D., Bowen, J., Delandes, B., Labaune, J., Mourou, G., Menu, M., Detalle, V. and Targowski, P. (2013) Terahertz analysis of stratified wall plaster at buildings of cultural importance across Europe. In: Optics for Arts, Architecture and Archaeology IV, May 30 2013, Munich, Germany, 87900H.

Jackson, J. B., Labaune, J., Walker, G., Menu, M. and Mourou, G. A. (2012) Challenges facing terahertz pulsed reflectometry of historical architecture. In: 3rd European Optical Society Topical Meeting on Terahertz Science & Technology, June 2012, Prague, Czech Republic, June 2012.

Walker, G., Jackson, J. B., Matthews, W., Bowen, J., Labaune, J., Mourou, G. A., Whitaker, J. F., Menu, M. and Hodder, I. (2012) Seeing through walls: sub-surface imaging at Çatalhöyük. In: Raman and Infrared User Group Meeting, March 2012, Barcelona, Spain.

Walker, G., Labaune, J., Jackson, J. B., Bowen, J., Matthews, W., Whitaker, J. F., Mourou, G. A., Menu, M. and Hodder, I. (2012) Terahertz deconvolution for the analysis of cultural heritage. In: Advanced Electromagnetics Symposium (AES 2012), 16-19 Apr 2012, Paris, France.

Walker, G., Jackson, J. B., Matthews, W., Bowen, J., Labaune, J., Mourou, G. A., Naftaly, M., Dudley, R., Whitaker, J. F., Menu, M. and Hodder, I. (2011) Seeing through walls at Çatalhöyük. In: UK Archaeological Science Conference, September 2011, Reading.

Walker, G. C., Labaune, J., Bowen, J. W., Jackson, J., Hadjiloucas, S. ORCID: https://orcid.org/0000-0003-2380-6114, Mourou, G. and Menu, M. (2011) Deconvolution: imaging the unturned page. In: 36th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz 2011), 02-07 Oct 2011, Houston, TX.

Hadjiloucas, S. ORCID: https://orcid.org/0000-0003-2380-6114, Walker, G. C. and Bowen, J. W. (2010) Quantifying user perception of foodstuffs using THz spectrometry. In: IRMMW-THz 2010: the 35th International Conference on Infrared, Millimeter and Terahertz Waves, 5-10 Sept 2010, Rome, Italy.

Hadjiloucas, S. ORCID: https://orcid.org/0000-0003-2380-6114, Walker, G. C., Bowen, J. W. and Karatzas, L. (2010) Proposed design for an ultrasonic optical force-feedback microphone. In: GDR-AFPAC 6th Conference of the GDR 2501 Research on Ultrasound Propagation for NDT jointly with the 10th Anglo-French Physical Acoustics Conference (AFPAC) Organised by the IOP Physical Acoustics Group and the French Group de Recherche (GDR) and GAPSUS, 18-22 January 2010, Castle Green Hotel, Lake District, UK , p. 74.

Hadjiloucas, S. ORCID: https://orcid.org/0000-0003-2380-6114, Walker, G. C., Bowen, J. W. and Galvão, R. K. H. (2010) Femto-chemometrics: the signal processing of fast pulse transients. In: 35th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz 2010), 05-10 Sep 2010, Rome, Italy.

Hadjiloucas, S. ORCID: https://orcid.org/0000-0003-2380-6114, Walker, G. and Bowen, J. (2010) Quantifying user perception of foodstuffs using THz spectrometry. In: 35th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz 2010), 05-10 Sep 2010, Rome, Italy.

Hadjiloucas, S. ORCID: https://orcid.org/0000-0003-2380-6114, Zafiropoulos, A. , Walker, G.C. and Bowen, J.W. (2009) Inferring relative water content and water availability using THz radiation. In: 2nd annual meeting on THz sensing: techniques and applications, The Institute of Physics, London.

Hadjiloucas, S. ORCID: https://orcid.org/0000-0003-2380-6114, Shaver, A., Walker, G.C. and Bowen, J.W. (2009) Prospects for bio-molecular control using femtosecond transients parametrised in the wavelet domain. In: Biophotonics: technology and applications meeting, The Institute of Physics, London .

Bowen, J. W. and Walker, G. C. (2008) The definition and distortion of features in medical terahertz imaging. In: Illuminated and Enlightened: an IPEM meeting, 29-30 July 2008, Reading, UK.

Bowen, J.W., Walker, G.C., Alozie, D. and Hadjiloucas, S. ORCID: https://orcid.org/0000-0003-2380-6114 (2008) Achieving sub-wavelength spatial resolution in terahertz imaging by exploiting phase cancellation effects. In: European Optical Society Annual Meeting: EOSAM - TOM 2: Terahertz Science and Technology, Paris, France.

Yin, X.X., Hadjiloucas, S. ORCID: https://orcid.org/0000-0003-2380-6114, Fischer, B.M., Ng, B.W.H., Paiva, H.M., Galvao, R.K.H., Walker, G.C., Bowen, J.W. and Abbott, D. (2008) Classification of lactose and mandelic acid THz spectra using subspace and wavelet-packet algorithms. In: Conference on Microelectronics - Design, Technology and Packaging III, Canberra, Australia.

Hadjiloucas, S. ORCID: https://orcid.org/0000-0003-2380-6114, Shaver, A., Walker, G.C. and Bowen, J.W. (2008) Prospects for bio-molecular control using femtosecond transients parametrised in the wavelet domain [poster]. In: European Optical Society Annual Meeting, Paris, France.

Fischer, B.M., Yin, X.X., Ng, B.W.H., Abbott, D., Galvao, R.K.H., Paiva, H.M., Hadjiloucas, S. ORCID: https://orcid.org/0000-0003-2380-6114, Walker, G.C. and Bowen, J.W. (2008) Subspace and wavelet-packet algorithms for de-noising and classifying broadband THz transients. In: 33rd International Conference on Infrared, Millimeter and Terahertz Waves, Pasadena, USA. doi: https://doi.org/10.1109/ICIMW.2008.4665758

Bowen, J.W., Walker, G.C. and Hadjiloucas, S. ORCID: https://orcid.org/0000-0003-2380-6114 (2008) System-dependent features in terahertz time-domain images and spectra. In: IOP ISAT meeting on ‘terahertz sensing: techniques and applications', London, UK.

Hadjiloucas, S. ORCID: https://orcid.org/0000-0003-2380-6114, Walker, G.C., Bowen, J.W. and Karatzas, L.S. (2008) An optical force-feedback microphone for sensing biophotonics related photoacoustic and photo-thermal phenomena [poster]. In: European Optical Society Annual Meeting, Paris, France.

Hadjiloucas, S. ORCID: https://orcid.org/0000-0003-2380-6114, Walker, G., Bowen, J. and Karatzas, L. S. (2008) An optical force-feedback microphone for sensing biophotonics related photoacoustic and photothermal phenomena. In: EOS Annual Meeting, 2008, Paris, France, p. 968.

Hadjiloucas, S. ORCID: https://orcid.org/0000-0003-2380-6114, Walker, G. C., Bowen, J. W., Paiva, H. A., Galvao, R. K. H. and Dudley, R. (2007) Apodisation, denoising and system identification techniques for THz transients in the wavelet domain. In: 2007 Joint 32nd International Conference on Infrared and Millimeter Waves and 15th International Conference on Terahertz Electronics, Vols 1 and 2, Cardiff.

Hadjiloucas, S. ORCID: https://orcid.org/0000-0003-2380-6114, Shaver, A.K., Walker, G.C., Bowen, J.W. and O'Leary, S.V. (2006) Feedback control of Femtosecond laser pulse shapes using Labview. In: National Instruments Labview in the Curriculum 2006 Academic Conference, 34 - 45.

Hadjiloucas, S. ORCID: https://orcid.org/0000-0003-2380-6114, Walker, G.C. and Bowen, J.W. (2006) Femtosecond reserach activities at Reading. In: LSF User Meeting, Rutherford Appleton Laboratory, Oxon.

Hadjiloucas, S. ORCID: https://orcid.org/0000-0003-2380-6114, Shaver, A.K., Becerra, V.M., Walker, G.M., Bowen, J.W., O'Leary, S.V., Frasinski, L.J. and Galvao, R.K.H. (2005) Pseudospectral issues in tailored femtosecond pulses. Laser driven plasma acelerators: new sources of energetic particles and radiation. In: Poster Presentation at the Royal Society Discussion Meeting, London, UK.