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Materials, Spectroscopy, Waveguides

185. Richard J. Williams, Andrew J. Gatesman, Robert H. Giles, and William E. Nixon, "Phase characteristics of subwavelength antenna elements for efficient design of terahertz frequency and millimeter-wavelength metasurfaces," in Terahertz Physics, Devices, and System IX: Advanced Applications in Industry and Defense: Advanced Materials and Devices, Proceedings of SPIE Vol. 9483 (SPIE, Baltimore, MD, 2015).  pdf, 2.6MB 

181. Richard J. Williams, "Frequency Selective Terahertz Retroreflectors," M.S. Thesis, Department of Physics and Applied Physics, University of Massachusetts Lowell, USA, 2014. pdf, 2.9MB 

180. D. A. DiGiovanni, Andrew J. Gatesman, T. M. Goyette, R. H. Giles, "Surface and volumetric backscattering between 100 GHz and 1.6 THz," in Passive and Active Millimeter-Wave Imaging XVII, edited by David A. Wilkner, Arttu R. Luukanen, Proceedings of SPIE Vol. 9078 (SPIE, Bellingham, WA, 2014) 90780A. pdf, 6.0MB

179. Richard J. Williams, Andrew J. Gatesman, Thomas M. Goyette, and Robert H. Giles, "Radar Cross Section Measurements of Frequency Selective Terahertz Retroreflectors," in Terahertz Physics, Devices, and System VIII: Advanced Applications in Industry and Defense​, edited by Mehdi F. Anwar, Thomas W. Crowe, Tariq Manzur, Proceedings of SPIE Vol. 9102 (SPIE, Baltimore, MD, 2014) 91020R. pdf, 1.1MB 

174. Pallavi Doradla ; Robert H. Giles; "Dual-frequency characterization of bending loss in hollow flexible terahertz waveguides," Proc. SPIE 8985, Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications VII, 898518 (March 7, 2014); doi: 10.1117/12.2038596. pdf 4.5 MB 

173.D. A. DiGiovanni, A. J. Gatesman, R. H. Giles, W. E. Nixon, "Backscattering of Ground Terrain and Building Materials at Millimeter-Wave and Terahertz Frequencies" in Passive and Active Millimeter-Wave Imaging XVI, edited by David A. Wikner, Arttu R. Luukanen, Proceedings of SPIE Vol. 8715, June 2013. pdf, 1.6 MB

168. Pallavi Doradla, Cecil S. Joseph, Jayant Kumar, and Robert H. Giles, "Characterization of bending loss in hollow flexible terahertz waveguides," Optics Express, Vol. 20, No. 17, pp. 19176-19184 (2012). pdf, 1.4 MB

166.Doradla, P., Joseph, C. S., Kumar, J., Giles, R. H., "Propagation loss optimization in metal/dielectric coated hollow flexible terahertz waveguides" in Terahertz Technology and Applications V, edited by Laurence P. Sadwick, Créidhe M. O'Sullivan, Proceedings of SPIE Vol. 8261 (SPIE, Bellingham, WA 2012) 82610P, January 2012. pdf, 800 KB

160. James M. Cramer, “Dielectric Resonator Fabrication and Assembly Methods for Terahertz Metamaterials” Ph.D. dissertation, Dept. of Physics and Applied Physics, University of Massachusetts Lowell, USA, 2011 pdf, 8.8 MB

157. A. Jagannathan, A. J. Gatesman; T. Horgan, T. Goyette, M. Coulombe, R. H. Giles, and W. E. Nixon, "Effect of periodic roughness and surface defects on the terahertz scattering behavior of cylindrical objects," SPIE Proceedings Vol. 7671 Terahertz Physics, Devices, and Systems IV, Mehdi Anwar, Nibir K. Dhar, Thomas W. Crowe, Editors, 26 April 2010 pdf, 4.7 MB

156. A. Jagannathan, A. J. Gatesman, and R. H. Giles, "Characterization of roughness parameters of metallic surfaces using terahertz reflection spectra," Optics Letters, Vol. 34, No. 13, pg. 1927, July 1, 2009 pdf, 270 KB

147. E. J. Ehasz, T. M. Goyette, R. H. Giles and W. E. Nixon, "High Resolution Frequency Measurements of Far-Infrared Laser Lines,"IEEE Journal of Quantum Electronics, vol. 46, no. 4, pp. 474-477, April 2010. pdf, 330 KB

144. Chiayun Wu, Andrew J. Gatesman, Lucille M. DeRoeck, Thomas M. Horgan, Robert H. Giles, William E. Nixon, "Terahertz backscattering behavior of various absorbing materials" in Terahertz Physics, Devices, and Systems III: Advanced Applications in Industry and Defense, edited by Mehdi Anwar; Nibir K. Dhar; Thomas W. Crowe, Proceedings of SPIE Vol. 7311 (SPIE, Bellingham, WA 2009) 73110M. pdf, 10 MB

135. Andriy A. Danylov, Jerry Waldman, Thomas M. Goyette, Andrew J. Gatesman, Robert H. Giles, Kurt J. Linden, William R. Neal, William E. Nixon, Michael C. Wanke, and John L. Reno, "Transformation of the multimode terahertz quantum cascade laser beam into a Gaussian, using a hollow dielectric waveguide", Applied Optics, Volume 46, Issue 22, pp. 5051-5055 pdf, 1.4 MB

131. Andrew J. Gatesman, Andriy Danylov, Thomas M. Goyette, Jason C. Dickinson, Robert H. Giles, William Goodhue, Jerry Waldman, William E. Nixon, and Weber Hoen, "Terahertz Behavior of Optical Components and Common Materials", in Terahertz for Military and Security Applications IV, edited by Dwight L. Woolard, R. Jennifer Hwu, Mark J. Rosker, James O. Jensen, Proceedings of the SPIE Vol 6212 (SPIE, Bellingham, WA, 2006), 62120E. May 2006 pdf, 1.2 MB

128. A.J. Gatesman, T.M. Goyette, J.C. Dickinson, R.H. Giles, J. Waldman, J. Sizemore, R.M. Chase, W.E. Nixon, "Polarimetric Backscattering Behavior of Ground Clutter at X, Ka, and W-band", Proc. SPIE Vol. 5808, p. 428-439, Algorithms for Synthetic Aperture Radar Imagery XII; Edmund G. Zelnio, Frederick D. Garber; Eds. May 2005 pdf, 700 KB

124. Tatiana Globus, Ramakrishnan Parthasarathy, Tatyana Khromova, Dwight L. Woolard, Nathan Swami, Andrew J. Gatesman, Jerry Waldman, "Optical characteristics of biological molecules in the terahertz gap", Proc. SPIE Vol. 5584, p. 1-10, Chemical and Biological Standoff Detection II; James O. Jensen, Jean-Marc Theriault; Eds. Dec 2004 pdf, 844 KB

113. Christopher J. Beaudoin, Andrew J. Gatesman, Robert H. Giles, Jerry Waldman, Markus E. Testorf, Michael A. Fiddy, William E. Nixon, "Foliage penetrating radar imaging system", Proc. SPIE Vol. 4792, p. 173-184, Image Reconstruction from Incomplete Data II; Philip J. Bones, Michael A. Fiddy, Rick P. Millane; Eds. December 2002 pdf, 700 KB

109. A. J. Gatesman, C. Beaudoin, R. H. Giles, J. Waldman, W. E. Nixon, "VHF/UHF imagery and RCS measurements of ground targets in forested terrain", Proc. SPIE Vol. 4727, p. 80-90, Algorithms for Synthetic Aperture Radar Imagery IX; Edmund G. Zelnio; Ed. August 2002 pdf, 2 MB

106. A.J. Gatesman, M. Testorf, C. Beaudoin, M. Fiddy, R. Giles, J. Waldman, K. Ding, J. Poirier, W.E. Nixon, "VHF/UHF Radar Signatures of Foliage-Obscured Threat Military Vehicles", Invited Poster. CCC&D FOPEN Workshop, MIT Lincoln Laboratory, November 2001. pdf, 7 MB

104. A. J. Gatesman, T. M. Goyette, J. C. Dickinson, J. Waldman, J. Neilson, W. E. Nixon, "Physical Scale Modeling the Millimeter-Wave Backscattering Behavior of Ground Clutter", Proc. SPIE Vol. 4370, p. 141-151, Targets and Backgrounds VII: Characterization and Representation; Wendell R. Watkins, Dieter Clement, William R. Reynolds; Eds. September 2001 pdf, 2.1 MB

96. J.D. Kekis, M. Testorf, M.A. Fiddy, R.H. Giles, "Detecting 1/10th Scaled Structures in Dielectric Media Using Monostatic X-Band Radar Scattering Measurements", Proc. SPIE Vol. 4123, p. 13-24, Image Reconstruction from Incomplete Data; Michael A. Fiddy, Rick P. Millane; Eds. November 2000 pdf, 932 KB

94. W.A. Bailey, A.J. Gatesman, K.R. Gringas, W.D. Goodhue, "Fabrication and Optimization of Uniform Output Couplers for Far-Infrared Lasers", Optics Letters, Vol 25, No. 18, pg. 1349, September 15, 2000. pdf, 98.5 KB

90. A.J. Gatesman, J. Waldman, M. Ji, C. Musante, S. Yngvesson, "An anti-reflection coating for silicon optics at terahertz frequencies", Microwave and Guided Wave Letters, IEEE [see also IEEE Microwave and Wireless Components Letters] Volume: 10 Issue: 7 Jul 2000 Page(s): 264-266 pdf, 76 KB

81. A. J. Gatesman, J.Dickinson, T. Goyette,M. J. Coulombe, T.Horgan,R. H. Giles, and J. Waldman,"Physical Modeling of Lo Ships and Composite Structures/Materials", EM/RF/IR Ship and Submarine Signatures Control Workshop, Naval Research Labroratory, Washington D.C.,28 May 1998.

80. E. S. Jacobs, J. Waldman and W. D. Goodhue, "77K Far-Infrared Hot-Electron Multi-Quantum Well Detectors", Journal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures -- May 1998 -- Volume 16, Issue 3, pp. 1430-1434 pdf, 88 KB

75. K. Bober, R. H. Giles and J. Waldman, "Tailoring the Microwave Permittivity and Permeability of Composite Materials", International Journal of Infrared and Millimeter Waves, 18, 101, 1997.pdf, 260 KB

73. A. J. Gatesman, M. J. Coulombe, R. H. Giles, W. Goodhue, T. Horgan, J. Waldman, W. E. Nixon and K. Wilson, "Scale Model Radar Cross Section Measurements of the Navy's Advanced Enclosed Mast/Sensor System", Proceedings of the 1997 HAVE FORUM Low Observable Symposium, Fort Walton Beach, Florida, 8-10 April 1997.

67. R.H. Giles, "Characterization of Material Properties at Terahertz Frequencies", Proceedings of the NIST Terahertz Technology Workshop ,V9, 698 (1995).pdf, 975 KB

64. E.R. Mueller, D.M. Larsen, W.D. Goodhue, J. Waldman, "Band Nonparabolicity and Central-Cell Corrections for D- Centers in GaAs Quantum Wells", Phys. Rev. B 51, 2326-2333 (1995) [Issue 4 - 15 January 1995] pdf, 1.2 MB

61. D.W. Poterfield, J.L. Hesler, R. Densing, E.R. Mueller, T.W. Crowe, R.M. Weikle II, "Resonant Metal Mesh Bandpass Filters for the Far-Infrared", Applied Optics, Volume 33, Issue 25, pp. 6046-6052 September 1994 pdf, 1.1 MB

59. E.R. Mueller, D.M. Larsen, J. Waldman, and W.D. Goodhue, "Effects of Band Nonparabolicity and Central-Cell Corrections on the Spectrum of Si Donors in GaAs Quantum Wells", Physical Review. B , 49 (19), 13475 (1994).pdf, 1.1 MB

54. W.D. Goodhue, E.R. Mueller, D.M. Larsen, J. Waldman, Y.H. Chai, S.C. Lia, and G.D. Johnson, "Quantum Well GaAs/AlGaAs Shallow-Donor Far-Infrared Photoconductors Grown by Molecular Beam Epitaxy", Journal of Vacuum Science and Technology , Vol. 11, No. 3 pp 941-944,.May/June 1993.pdf, 354 KB

53. A.J. Gatesman, R.H. Giles,J. Waldman, "Submillimeter Optical Properties of Hexagonal Boron Nitride", Journal of Applied Physics, 4/15/93, Vol. 73 Issue 8, p3962.pdf, 130 KB

52. R.H. Giles, A.J. Gatesman, J. Fitz-Gerald, S. Fisk, J. Waldman, "Tailoring Artificial Dielectric Materials at Terahertz Frequencies", The Fourth International Symposium on Space Terahertz Technology , April 1993, Los Angeles, CA.pdf, 130 KB

50. C.E. Hawkins, R. Densing, T.J. Scholz, and A.J. Gatesman, "Strip Grating Output Couplers for Far-Infrared Lasers", Proc. of the 17th Int. Conf. on Infrared and Millimeter Waves , Dec. 1992, Los Angeles, CA.pdf, 2.3 MB

49. A.J. Gatesman, R.H. Giles, and J. Waldman, "A High Precision Reflectometer for the Study of Optical Properties of Materials in the Submillimeter", Proc. of the 17th Int. Conf. on Infrared and Millimeter Waves , Dec. 1992, Los Angeles, CA.pdf, 65 KB

48. D.R. Cohn, S.C. Han, P.P. Woskov, B.L. Zhou, A. Ferdinand, R.H. Giles, J. Waldman, D.W. Cooke and R.E. Muenchausen, "Precision Submillimeter Wave Laser Reflection Measurements of High-Temperature Superconductors", Journal of Superconductivity. Vol. 5, No.4, 1992 p.389-393 pdf, 7.5 MB

47. R.H. Giles, T.M. Horgan, and J. Waldman, "Silicone-Based Anechoics at Terahertz Frequencies", Proc. of the 17th Int. Conf. on Infrared and Millimeter Waves, Dec. 1992, Los Angeles, CA.pdf, 3.5 MB

45. R. Densing, A. Erstiling, M. Gogolewski, H.P. Gemund, G. Lundershausen, A. Gatesman, "Effective Far-Infrared Laser Operation with Mesh Couplers", Infrared Physics Volume 33, Issue 3 , 1992, Pages 219-226 pdf, 10.7 MB

44. J. Waldman, D.B. Moix, D.P. Scherrer, F.K. Kneubuhl, W.D. Goodhue, E.R. Mueller, M.J. Coulombe, "Multiquantum-Well Detection of Nanosecond Far-Infrared Superradiant Pulses at Temperatures above 77K", Infrared Physics Volume 33, Issue 6 , November 1992, Pages 487-491 pdf, 7.8 MB

43. A.J. Gatesman, R.H. Giles, and J. Waldman, "Submillimeter Optical Properties of Hexagonal Boron Nitride", Proc. of MRS Society , 242, 623 (1992).pdf, 130 KB

40. Z. Fried, G.C. Phillips, and J. Waldman, "Laboratory measurements of scattered electromagnetic radiation from two-dimensional metallic and dielectric rough surfaces", JOSA B, Volume 9, Issue 5, 698- May 1992 pdf, 1.3 MB

39. E.R. Mueller, D.M. Larsen, J. Waldman, and W.D. Goodhue, "Definitive Identification of D- Centers in GaAs Quantum Wells by Tilt-Induced Line Splitting in a Magnetic Field", Phys. Rev. Lett. 68, 2204-2207 (1992) [Issue 14 - 6 April 1992] pdf, 625 KB

38. E.R. Mueller, W.D. Goodhue, D.M. Larsen, J.W. Bales, and J. Waldman, "Magneto-Optical Study of Donor Level Crossing in Tipped GaAs/(GaAl)As Quantum Wells", Phys. Rev. B 44, 1754-1761 (1991) [Issue 4 - 15 July 1991] pdf, 1.3 MB

37. G.C. Phillips, R. Suresh, J.I. Chen, J. Waldman, J. Kumar, J.C. Huang, "Dielectric Properties of Polypyrrole Doped with Tosylate Anion in the Far Infrared and Microwave", Journal of Applied Physics, 1/15/91, Vol. 69 Issue 2, p899 pdf, 696 KB

36. A.J. Gatesman, R. H. Giles, J. Waldman, University of Lowell, L.P. Bourget, R.S. Post, ASTEX, "Optical Properties of Polycrystalline Diamond Films in the Far Infrared", Proc. SPIE Vol. 1325, p. 170-177, Diamond Optics III; Albert Feldman, Sandor Holly; Eds. December 1990 pdf, 65 KB

35. R.H. Giles, A.J. Gatesman, A.P. Ferdinand, and J. Waldman, University of Lowell, "Design and Fabrication of Narrow Band Radar Absorbing Materials at Terahertz Frequencies", IEEE Proceedings from the 15th International Conference on Infrared and Millimeter Waves , Orlando, FL, Dec. 1990 pdf, 65 KB

34. A.J. Gatesman, R.H. Giles, and J. Waldman, University of Lowell, "FTIR Spectroscopy of CVD and Natural Diamond", IEEE Proceedings from the 15th International Conference on Infrared and Millimeter Waves , Orlando, FL, December 1990

33. P.P. Woskov, D.R. Cohn, S.C. Han, Xsirius Superconductivity Inc., and R.H. Giles, J. Waldman, University of Lowell, "Precision Submillimeter-Wave Laser Reflectometry of Metals and Superconductors", IEEE Proceedings from the 15th International Conference on Infrared and Millimeter Waves , Orlando, FL, December 1990

32. G.C. Phillips, R. Suresh, J.I. Chen, J. Waldman, J. Kumar, J.C. Huang, "Infrared Dielectric Behavior of Polypyrrole Doped with Tosylate", Solid State Communications Volume 76, Issue 7 , November 1990, Pages 963-966 pdf, 9 MB

31. R.H. Giles, A.J. Gatesman, and J. Waldman, "A Study of the Far-Infrared Optical Properties of Rexolite™", International Journal of Infrared and Millimeter Waves , 11, 1299 (1990).pdf, 65 KB

30. G.C. Phillips, Z. Fried, J. Waldman, "Non-Specular Scattering from Roughened Aluminum Surfaces", Proceedings of the 1990 URSI Radio Science Meeting , May 1990, Dallas, TX, pg. 110.

29. A.J. Gatesman, R.H. Giles, G. Phillips, J. Waldman, University of Lowell, L.P. Bourget, R.S. Post, ASTEX, "Far Infrared Spectroscopic Study of Diamond Films", Proc. of MRS Society , 162, 185 (1989).pdf, 65 KB

28. R.H. Giles, A.P. Ferdinand, M.J. Coulombe, J. Waldman, ULRF and W. Nixon, W. Reinhold, AFSTC, "Submillimeter Wavelength Modeling of Dielectric Materials in Polarimetric Radar Approaches", Proceedings of the NATO Advanced Research Workshop on Direct and Inverse Methods in Radar Polarimetry , Bad Windsheim, Federal Republic of Germany, September 1988.

27. R.H. Giles, A.P. Ferdinand, M.J. Coulombe, J. Waldman, ULRF and W. Nixon, W. Reinhold, AFSTC, "Submillimeter Polarimetric Modeling Applied to Dielectric Materials", Proceedings of the Polarimetric Technology Workshop , Huntsville, AL, August 1988.pdf, 65 KB

26. G.C. Phillips, R.H. Giles, S.K. Tripathy, J. Waldman, "The Far Infrared Dielectric Properties of Conducting Polymers", 12th Annual IEEE Conference on Infrared and Millimeter Waves , Orlando, FL, December 1987, Conference Digest pg. 132.

23. R.H. Giles, and M.J. Coulombe, "Design of a Submillimeter Ellipsometer for the Measurement of Complex Indices of Refraction of Materials", IEEE Proceedings from the 10th International Conference on Infrared and Millimeter Waves , Orlando, FL, December 1985 pdf, 400 KB

21. H. Dave, R.W. Stimets, and J. Waldman, "An Investigation of CaF2:DY2+ System to Determine Its Potential A Continuously Tunable Far-Infrared Laser", Infrared Physics Volume 22, Issue 1 , January 1982, Pages 51-56

16. J. Waldman, R.W. Stimets, S. Zopey Madan, and T.S. Chang, "Magnetospectroscopy of CaF2:DY2+ in the Submillimeter", Infrared Physics Volume 18, Issue 2 , March 1978, Pages 141-146

13. S.M. Wolfe, K.J. Button, J. Waldman, and D.R. Cohn, "Modulated Submillimeter Laser Interferometer System for Plasma Density Measurements", Applied Optics, Volume 15, Issue 11, 2645- November 1976 pdf, 788 KB

12. C.W. Litton, K.J. Button, J. Waldman, D.R. Cohn, and B. Lax, "Verification of Polaron Cyclotron Resonance Theory and Determination of the Coupling Constant in n-CdTe", Phys. Rev. B 13, 5392-5396 (1976) [Issue 12 - 15 June 1976] pdf, 862 KB

11. J. Waldman, T.S. Chang, H.R. Fetterman, C.M. Wolfe, and G.E. Stillman, "Recombination Radiation from Landau States in Impact Ionized GaAs", Solid State Communications, Volume 15, Issue 8, 15 October 1974, Pages 1309-1312 pdf, 4.8 MB

10. R.W. Stimets, J. Waldman, J. Lin, T.S. Chang, R.J. Temkin, and G.A.N. Connell, "Photon Spectra of Amorphous GaAs and Ge", Proceedings of the 5th International Conference on Amorphous Semiconductors, Pergamon Press (1974).

9. J. Waldman, T.S. Chang H.R. Fetterman, G.E. Stillman, C.M. Wolfe, "Tunable Far Infrared Luminescence from Landau States in n-GaAs", Solid State Communications 15, 1309 (1974).

8. R.W. Stimets, J. Waldman, J. Lin, T.S. Chang, R.J. Temkin, and G.A.N. Connell, "Far Infrared Absorption of Amorphous GaAs and Ge", Solid State Communications Volume 13, Issue 9 , 1 November 1973, Pages 1485-1489 pdf, 10.5 MB

7. H.R. Fetterman, J. Waldman, C.M. Wolfe, G.E. Stillman, and C.D. Parker, "Identification of Donor Species in High-Purity GaAs Using Optically Pumped Submillimeter Lasers", Applied Physics Letters; November 1, 1972; Volume 21, Issue 9, pp. 434-436 pdf, 291 KB

6. H.R. Fetterman, H.R. Schlossberg, and J. Waldman, "Submillimeter Spectroscopy", Laser Focus 8, 42 September 1972.

5. H.R. Fetterman, J. Waldman, and C.M. Wolfe, "Compositional Dependence of Effective Masses in n-type GaxIn1-xAs Alloys Using Submillimeter Cyclotron Resonance", Solid State Communications Volume 11, Issue 2 , July 1972, Pages 375-379 pdf, 9.9 MB

3. H.R. Fetterman, D.M. Larsen, G.E. Stillman, P.E. Tannenwald, and J. Waldman, "Field-Dependent Central-Cell Corrections in GaAs by Laser Spectroscopy", Physical Review Letters 26, 975 (1971).pdf, 833 KB

2. I. Melngailis, G.E. Stillman, J.O. Dimmock, C.M. Wolfe, "Far-Infrared Recombination Radiation from Impact-Ionized Shallow Donors in GaAs", Physical Review Letters Volume 23 No. 19 November 10, 1969 pdf, 712 KB

1. J. Waldman, D.M. Larsen, P.E. Tannenwald, C.C. Bradley, D.R. Cohn, and B. Lax, "Polaron Cyclotron Resonance in CdTe", Physical Review Letters 23, 1033 (1969).pdf, 846 KB