Theocharous, E; Fox, N. P.; Barker-Snook, I.; Niclòs, R.; Santos, V. G.; Minnett, P. J.; Göttsche, F. M.; Poutier, L.; Morgan, N.; Nightingale, T.; Wimmer, W.; Høyer, J.; Zhang, K.; Yang, M.; Guan, L.; Arbelo, M.; Donlon, C. J. (2019) The 2016 CEOS Infrared Radiometer Comparison: Part II: Laboratory Comparison of Radiation Thermometers. Journal of Atmospheric and Oceanic Technology, 36 (6). pp. 1079-1092. ISSN 0739-0572

Coll, C; Niclòs, R; Puchades, J; García-Santos, V; Galve, J M; Pérez-Planells, L; Valor, E; Theocharous, E (2019) Laboratory calibration and field measurement of land surface temperature and emissivity using thermal infrared multiband radiometers. International Journal of Applied Earth Observation and Geoinformation, 78. pp. 227-239. ISSN 03032434

Spidell, M T; Conklin, D R; Yung, C S; Theocharous, E; Lehman, J H (2019) Spectral, spatial, and survivability evaluation of a flash-dried plasma-etched nanotube spray coating. Applied Optics, 58 (2). p. 257. ISSN 1559-128X

Theocharous, E; Chunnilall, C J; Mole, R*; Gibbs, D; Fox, N P; Shang, N G*; Howlett, G*; Jensen, B*; Taylor, R*; Reveles, J R*; Harris, O B*; Ahmed, N* (2014) The partial space qualification of a vertically aligned carbon nanotube coating on aluminium substrates for EO applications. Opt. Express, 22 (6). pp. 7290-7307.

Theocharous, E; Theocharous, S P*; Lehman, J H* (2013) Assembly and evaluation of a pyroelectric detector bonded to vertically aligned multiwalled carbon nanotubes over thin silicon. Appl. Opt., 52 (33). pp. 8054-8059.

Gutschwager, B*; Theocharous, E; Monte, C*; Adibekyan, A*; Reiniger, M*; Fox, N P; Hollandt, J* (2013) Comparison of the radiation temperature scales of the PTB and the NPL in the temperature range from -57 °C to 50 °C. Meas. Sci. Technol., 24 (6). 065002

Kylberg, W*; Castro, F A; Chabrecek, P*; Geiger, T*; Heier, J*; Nicholson, P G*; Nüesch, F*; Theocharous, E; Sonderegger, U*; Hany, R* (2013) Spatially resolved photocurrent mapping of efficient organic solar cells fabricated on a woven mesh electrode. Prog. Photovolt.: Res. Appl., 21 (4). pp. 652-657.

Theocharous, E; Fox, N P (2012) The treatment of uncertainties in SST measurements using radiation thermometers for the validation of satellite measurements. NPL Report. OP 7

Theocharous, E (2012) The use of fluorescence thermometry to verify SST measurements made using radiation thermometers: A proposal. NPL Report. OP 8

Theocharous, E (2012) Absolute linearity measurements on a PV HgCdTe detector in the infrared. Metrologia, 49 (2). S99-S104

Chunnilall, C J; Theocharous, E (2012) Infrared hemispherical reflectance measurements in the 2.5 µm to 50 µm wavelength region using an Fourier transform spectrometer. Metrologia, 49 (2). S73-S80

Chunnilall, C J; Lehman, J H*; Theocharous, E; Sanders, A* (2012) Infrared hemispherical reflectance of carbon nanotube mats and arrays in the 5 um to 50 um wavelength region. Carbon, 50 (14). pp. 5348-5350.

Theocharous, E; Lehman, J* (2012) The evaluation of a pyroelectric detector with and without a sprayed multi-walled carbon nanotube coating. Infrared Phys. Technol., 55 (1). pp. 161-165.

Theocharous, S P*; Theocharous, E; Lehman, J H* (2012) The evaluation of the performance of two pyroelectric detectors with vertically aligned multi-walled carbon nanotube coatings. Infrared Phys. Technol., 55 (4). pp. 299-305.

Cheung, J Y; Chunnilall, C J; Porrovecchio, G*; Smid, M*; Theocharous, E (2011) Low optical power reference detector implemented in the validation of two independent techniques for calibrating photon counting detectors. Opt. Express, 19 (21). pp. 20347-20363.

Salim, S G R; Fox, N P; Theocharous, E; Sun, T*; Grattan, K T V* (2011) Temperature and nonlinearity corrections for a photodiode array spectrometer used in the field. Appl. Opt., 50 (6). pp. 866-875.

Theocharous, E; Lehman, J* (2011) The evaluation of a pyroelectric detector with a sprayed carbon multi-wall nanotube black coating in the infrared. Infrared Phys. Technol., 54 (1). pp. 34-38.

Theocharous, E; Fox, N P (2010) CEOS comparison of IR brightness temperature measurements in support of satellite validation. Part II: Laboratory comparison of the brightness temperature of blackbodies. NPL Report. OP 4

Theocharous, E; Usadi, E; Fox, N P (2010) CEOS comparison of IR brightness temperature measurements in support of satellite validation. Part I: Laboratory and Ocean surface temperature comparison of radiation thermometers. NPL Report. OP 3

Theocharous, E; Cheung, J Y; Chunnilall, C J (2010) Characterisation of photon counting systems at NPL. Proc. SPIE - Int. Soc. Opt. Eng., 7681. 768105

Theocharous, E; Itzler, M A*; Cheung, J Y; Chunnilall, C J (2010) The characterisation of the linearity of response and spatial uniformity of response of two InGaAsP/InP Geiger-mode avalanche photodiodes. IEEE J. Quantum Electron., 46 (11). pp. 1561-1567.

Theocharous, E (2008) Absolute linearity calibration of lock-in amplifiers. In: Proceedings of NEWRAD 2008 Conference.

Theocharous, E (2008) Absolute linearity characterization of lock-in amplifiers. Appl. Opt., 47 (8). pp. 1090-1096.

Theocharous, E (2008) Absolute linearity measurements on LiTaO3 pyroelectric detectors. Appl. Opt., 47 (18). pp. 3397-3405.

Theocharous, E (2008) Absolute linearity measurements on a gold-black coated deuterated L-alamine-doped Triglycine sulphate pyroelectric detector. Appl. Opt., 47 (21). pp. 3731-3736.

Theocharous, E (2008) Absolute linearity measurements on goldblack-coated pyroelectric detectors. In: Proceedings of NEWRAD 2008 Conference, 2008.

Theocharous, E; Engtrakul, C*; Dillon, A C*; Lehman, J* (2008) Infrared responsivity of a pyroelectric detector with a single wall carbon nanotube coating. Appl. Opt., 47 (22). pp. 3999-4003.

Theocharous, E (2008) Infrared spectrophotometry; some of the pitfalls. In: Fifth Oxford Conference on Spectroscopy, 26-28 June 2006, NPL, Teddington, UK.

Theocharous, E; Engtrakul, C*; Dilon, A C*; Lehman, J* (2008) The evaluation of a pyroelectric detector with a single wall carbon nanotube coating in the infrared. In: Proceedings of NEWRAD 2008 Conference, 2008.

Theocharous, E; Hartree, W S; Fox, N P; Hopkinson, G*; Gomaz-Rojas, L* (2008) The evaluation of two pyroelectric detectors for the EarthCARE Earth Observation mission. In: Proceedings of NEWRAD 2008 Conference.

Theocharous, E (2007) Absolute linearity measurements on a PbSe detector in the infrared. Infrared Phys. Technol., 50 (1). pp. 63-69.

Dury, M R; Theocharous, E; Harrison, N; Fox, N P; Hilton, M* (2007) Common black coatings - reflectance and ageing characteristics in the 0.32 - 14.3 µm wavelength range. Opt. Commun., 270. pp. 262-272.

Theocharous, E (2007) How linear is your photodetector? Europhotonics (Februa). pp. 33-35.

Theocharous, E; Hartree, W S (2006) The evaluation of the performance of bandpass filters for filter radiometry applications. NPL Report. DQL-OR 017

Theocharous, E (2006) Absolute linearity measurements on the PbS detector in the infrared. Appl. Opt., 45 (11). pp. 2381-2386.

Theocharous, E (2006) Drift in cryogenically cooled photodetectors: causes and cures. Photonics Spectra (April). 70 - 72

Theocharous, E; Deshpande, R*; Dillon, A C*; Lehman, J* (2006) Evaluation of a pyroelectric detector with a carbon multiwalled nanotube black coating in the infrared. Appl. Opt., 45 (6). pp. 1093-1097.

Theocharous, E (2006) On the stability of the spectral responsivity of cryogenically cooled photoconductive HgCdTe infrared detectors. Infrared Phys. Technol., 48. pp. 175-180.

Theocharous, E (2006) The establishment of the NPL infrared relative spectral responsivity scale using cavity pyroelectric detectors. Metrologia, 43 (2). S115-S119

Theocharous, E; Fox, N P (2005) Ageing effects in cryogenically cooled InSb infrared filtered detectors. Meas. Sci. Technol., 16. pp. 578-582.

Theocharous, E (2005) Drifts exhibited by cryogenically cooled InSb infrared filtered detectors and their importance to the ATSR-2 and Landsat-5 Earth observation missions. Appl. Opt., 44 (20). pp. 4181-4185.

Theocharous, E; Hawkins, G*; Fox, N P (2005) Reversible aging effects in cryogenically-cooled infrared filter radiometers. Infrared Phys. Technol., 46. pp. 339-349.

Theocharous, E (2005) Stability of the spectral responsivity of cryogenically cooled InSb infrared detectors. Appl. Opt., 44 (29). pp. 6087-6092.

Theocharous, E; Ishii, J*; Fox, N P (2005) A comparison of the performance of a photovoltaic HgCdTe detector with that of a large area single pixel QWIP for infrared radionmetric applications. Infrared Phys. Technol., 46. pp. 309-322.

Theocharous, E; Ishii, J*; Fox, N P (2004) Absolute linearity measurements on HgCdTe detectors in the infrared region. Appl. Opt., 43 (21). pp. 4182-4188.

Dury, M R*; Theocharous, E; Harrison, N J; Hilton, M*; Fox, N P (2004) The NPL wide-area, MIR calibration source. Proc. SPIE - Int. Soc. Opt. Eng., 5405 (1). pp. 532-540.

Theocharous, E; Wareham, E M* (2004) Ultra-high performance photodetection systems for radiometric applications. Meas. Sci. Technol., 15. pp. 1216-1221.

Rogers, L J; Theocharous, E; Ishii, J*; Fox, N P (2003) Development and evaluation of a novel large area single pixel QWIP for infrared radiometry. Proc. SPIE - Int. Soc. Opt. Eng., 5209 (1). pp. 219-27.

Lehman, J*; Theocharous, E; Eppeldauer, G*; Pannell, C* (2003) Gold-black coatings for freestanding pyroelectric detectors. Meas. Sci. Technol., 14. pp. 916-922.

Theocharous, E; Clarke, F J J; Rogers, L J; Fox, N P (2003) Latest measurement techniques at NPL for the characteristization of infrared detectors and materials. Proc. SPIE - Int. Soc. Opt. Eng., 5209 (1). pp. 228-239.

Theocharous, E; Fox, N P (2003) Reversible and apparent ageing effects in infrared detectors. Metrologia, 40. S136-S140

Theocharous, E; Clarke, F J J; Rogers, L J; Fox, N P (2003) The latest measurement techniques at NPL for the characterisation of infrared detectors and materials. Proc. SPIE - Int. Soc. Opt. Eng., 5209. pp. 228-239.

Hartree, W S; Theocharous, E; Fox, N P (2003) A wavelength tunable, quasi-cw laser source for high accuracy spectrometric measurement in the 200 nm to 500 nm region. Proc. SPIE - Int. Soc. Opt. Eng., 4826. pp. 104-112.

Theocharous, E; Birch, J R* (2002) Detectors for mid- and far-infrared spectrometry: selection and use. In: Handbook of Vibrational Spectroscopy Volume 1: Theory and Instrumentation. John Wiley & Sons Ltd, UK, pp. 1-19. ISBN 0471988472

Woolliams, E R; Pollard, D F; Harrision, N J; Theocharous, E; Fox, N P (2000) New facility for the high-accuracy measurement of lens transmission. Metrologia, 37. pp. 603-605.

Theocharous, E; Fox, N P; Sapritsky, V I*; Mekhontsev, S N*; Morozova, S P* (1998) Absolute measurements of blackbody emitted radiance. Metrologia, 35 (4). pp. 549-554.

Fox, N P; Ward, T H; Theocharous, E (1998) Establishing a new UV and NIR spectral responsivity scale. Metrologia, 35 (4). pp. 535-541.

Theocharous, E; Prior, T R; Haycocks, P R; Fox, N P (1998) High accuracy infrared spectral responsivity scale. Metrologia, 35 (4). pp. 543-548.

Chunnilall, C J; Fox, N P; Theocharous, E (1997) Radiometric applications of Fourier-Transform spectrometers. Mikrochim. Acta, 14. pp. 175-177.

Fox, N P; Prior, T R; Theocharous, E; Mekhontsev, S N* (1996) Solid-state detectors for infrared radiometry. Metrologia, 32 (6). pp. 609-613.

Theocharous, E; Fox, N P; Prior, T J (1996) A comparison of the performance of infrared detectors for radiometric applications. Proc. SPIE - Int. Soc. Opt. Eng., 2815. pp. 56-58.

McEvoy, H C; Machin, G; Fox, N P; Theocharous, E; Hassan, I S* (1996) An ingaas radiation thermometer for temperature scale realisation. In: TEMPMEKO 96, 6th International symposium on Temperature and Thermal Measurements in Industry and Science, 10 - 12 September 1996, Torino, Italy.

Fox, N P; Prior, T R; Theocharous, E (1995) Radiometric calibration of infrared detectors and thermal imaging systems. Proc. SPIE - Int. Soc. Opt. Eng., 2474. pp. 229-237.