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Leon McCaughan Research Group - UW Department of Electrical & Computer Engineering

Leon McCaughan
Integrated Photonics Research Group
Department of Electrical & Computer Engineering

MAJOR PUBLICATIONS

C. Staus, T.F. Kuech, and L. McCaughan, "AlxGa1-xAs nested waveguide heterostructures for continuously phase-matched terahertz difference frequency generation," Optics Express, 18, 2332 (2010).
C. Staus, T.F. Kuech, and L. McCaughan, "Continuously phase-matched THz difference frequency generation in an embedded-waveguide structure supporting only fundamental modes," Optics Express, 16, 13296 (2008).
M. Bhardwaj, L. McCaughan, and S.K. Korotky, "Simulation and modeling of the restoration time for path based restoration schemes in planar mesh networks," J. Optical Networking, 5, 967 (2006).
M. Bhardwaj, L. McCaughan, S.K. Korotky, and I. Saniee, "Analytical description of shared restoration capacity for mesh networks," J. Optical Networking, 4, 130 (2005).
C. Staus, R. Suess, and L. McCaughan, "Laser-induced fracturing: An alternative to mechanical polishing and patterning of LiNbO₃ integrated optic chips," IEEE J. Lightwave Technol., 22, 1327 (2004).
V. Joshkin, K. Dovidenko, S. Oktyabrsky, D. Saulys, T.F. Kuech, and L. McCaughan, "New methods for fabricating patterned lithium niobate for photonic applications," J. Crystal Growth, 259, 273-78 (2003).
A. Chowdhury, C. Staus, B. Boland, T.F. Kuech, and L. McCaughan, "Experimental demonstration of 1535-1555 nm simultaneous optical wavelength interchange with a nonlinear photonic crystal," Optics Lett., 26, 1353 (2001).
A. Chowdhury and L. McCaughan, "Figure of merit for near-velocity-matched traveling wave modulators," Optics Lett., 26, 1317 (2001).
A. Chowdhury, S. Hagness, and L. McCaughan, "Simultaneous optical wavelength interchange with a two-dimensional second-order nonlinear photonic crystal," Optics Lett., 25, 832-34 (2000).
A. Chowdhury and L. McCaughan, "Optical multiplication using a bisected intersecting waveguide," IEEE J. Lightwave Technol., 18, 688 (2000).
A. Chowdhury and L. McCaughan, "Continuously phase-matched M-waveguides for second-order nonlinear upconversion," IEEE Photonics Technol. Lett., 12, 486 (2000).
V. Joshkin, S. Oktyabrsky, P. Moran, D. Saulys, T.F. Kuech, and L. McCaughan, "Growth of oriented lithium niobate on silicon by alternating gas flow chemical beam epitaxy with metalorganic precursors," Appl. Phys. Lett., 76, 2125-27 (2000).
D. Saulys, V. Joshkin, M. Khoudiakov, T.F. Kuech, A. Ellis, and L. McCaughan, "An examination of the surface decomposition chemistry of lithium niobate precursors under high vacuum conditions," J. Crystal Growth, 217, 287 (2000).
C. Paulson, A. Ellis, L. McCaughan, B. Hawkins, J. Sun, and T.F. Kuech, "Demonstration of near-field scanning photoreflectance spectroscopy," Appl. Phys. Lett., 77, 1943-45 (2000).
S. Jaloviar, J. Lin, F. Liu, V. Zielasek, L. McCaughan, and M. Lagally, "Step-induced optical anisotropy of vicinal Si(001)," Phys. Rev. Lett., 82, 791-94 (1999).
E. Rudkevich, F. Liu, D. Savage, T.F. Kuech, L. McCaughan, and M. Lagally, "Hydrogen-induced Si surface segregation on Ge-covered Si(001)," Phys. Rev. Lett., 81, 3467-70 (1998).
"Guided Wave and Integrated Optics" in Atomic, Molecular, and Optical Physics: Electromagnetic Radiation, eds. F. Dunning and R. Hulet, vol. 29C (1997).
E. Rudkevich, D. Saulys, D. Gaines, T. F. Kuech, and L. McCaughan, "Adsorption and decomposition studies of t-butyl silane on Si(001) 2x1 surfaces using FTIR-ATR spectroscopy," Surface Sci., 383, 69 (1997).
C. Huang and L. McCaughan, "980 pumped Er-doped LiNbO₃ waveguide amplifiers: A comparison with 1484 nm pumping," IEEE J. Selected Topics in Quant. Elect., 2, 367 (1997).
C. Huang and L. McCaughan, "Polarization-dependent enhancement of population inversion and of green upconversion in Er:LiNbO¬₃ by Yb co-doping," IEEE Photonics Technol. Lett., 9, 599 (1997).
C. Huang and L. McCaughan, "Photorefractive-damage-resistant Er-indiffused MgO:LiNbO₃ ZnO-waveguide amplifiers and lasers," Electronics Lett., 33, 1639-40 (1997).
E. Rudkevich, D. Savage, W. Cai, J. Bean, J. Sullivan, S. Nayak, T.F. Kuech, L. McCaughan, and M. Lagally, "Extended spectral range Fourier transform infrared attenuated total reflection spectroscopy on Si surfaces using a novel Si coated Ge attenuated total reflection prism," J. Vacuum Sci. Technol. A, 15, 2153 (1997).
D. Gill, J. Wright, and L. McCaughan, "Spectroscopic site determination in erbium-doped lithium niobate," Phys. Rev. B, 53, 2334 (1996).
C. Huang and L. McCaughan, "Er-diffused Ti:LiNbO₃ channel waveguide optical amplifiers pumped at 980 nm," Electronics Lett., 32, 215 (1996).
V. White, R. Ghodssi, C. Herdey, D. Denton, and L. McCaughan, "Use of photo-sensitive polyimide for deep x-ray lithography," Appl. Phys. Lett., 66, 2072 (1995).
V. White, R. Ghodssi, G. Fish, C. Herdey, H. Liu, D. Denton, and L. McCaughan, "A new method for producing graded index PMMA waveguides," IEEE Photonics Technol. Lett., 7, 772 (1995).
C. Huang, D. Gill, and L. McCaughan, "Evaluation of absorption and emission cross sections of Er-doped LiNbO₃ for application to integrated optic amplifiers," IEEE J. Lightwave Technol., 12, 803 (1994).
D. Gill, J. Wright, and L. McCaughan, "Site characterization of rare-earth doped LiNbO₃ using total site selective spectroscopy," Appl. Phys. Lett., 64, 2483 (1994).
"Guided Wave and Integrated Optics" in Methods of Experimental Physics, vol. III (1993).
"Critical Materials Issues in the Performance and Manufacturability of LiNbO₃ Integrated Optics in Optical Engineering" in Integrated Optics and Optoelectronics, eds. M. Razeghi and K.K. Wong, SPIE Optical Engineering Press (1993).
D. Gill, A. Judy, L. McCaughan, and J. Wright, "A method for the local incorporation of Er into LiNbO₃ guided wave optic devices by Ti co-diffusion," Appl. Phys. Lett., 60, 1067 (1992).
K. Choquette, L. McCaughan, D. Misemer, J. Potts, and G. Vernstrom, "Tunable photoluminescence of uniformly doped short-period GaAs doping superlattices," J. Appl. Phys., 71, 2805 (1992).
K. Choquette, D. Misemer, and L. McCaughan, "Electronic structure of short-period n-p GaAs doping superlattices," Phys. Rev. B, 43, 7040 (1991).
D. Gill, L. McCaughan, and N. Agrawal, "A new mechanism for controlling the optical properties of intersecting waveguides: Fractionally doping the intersection region," IEEE J. Quant. Elect., 27, 588 (1991).
E. True and L. McCaughan, "Large nonresonant light-induced refractive-index changes in thin films of amorphous arsenic sulfide," Optics Lett., 16, 458 (1991).
"Low-loss Electro-optic Switches at 1.3 µm Wavelength" in Photonic Switching, eds. Hinton and Midwinter (1990).
D. Gill, N. Agrawal, and L. McCaughan, "Reducing radiative loss in intersecting waveguides by fractionally doping the intersection region," IEEE Photonics Technol. Lett., 2, 887 (1990).
K. Choquette, L. McCaughan, and D. Misemer, "Third-order optical susceptibility in short-period GaAs doping superlattices," J. Appl. Phys., 66, 4387 (1989).
N. Agrawal and L. McCaughan, "Radiation losses in intersecting optical waveguides," J. Appl. Phys., 65, 4509 (1989).
N. Agrawal and L. McCaughan, "Low-loss TiLiNbO₃ intersecting waveguides," Appl. Phys. Lett., 54, 1669 (1989).
K. Choquette, L. McCaughan, and W.K. Smith, "Improved optical switching extinction in three-electrode Ti:LiNbO₃ directional couplers," Appl. Phys. Lett. 51, 2097 (1987).
L. McCaughan, N. Agrawal, and G. Bogert, "Novel physical effects in intersecting waveguides," Appl. Phys. Lett., 51, 1389 (1987).
L. McCaughan and K. Choquette, "Ti concentration inhomogeneities in Ti:LiNbO₃ waveguides," Optics Lett., 12, 567 (1987).
N. Agrawal, L. McCaughan, and S. Seshadri, "A multiple scattering analysis of intersecting waveguides," J. Appl. Phys., 62, 2187 (1987).
S.K. Korotky and L. McCaughan, "Control of section symmetry in reverse-directional coupler switches," Electronics Lett., 22, 1222 (1986).
L. McCaughan and S.K. Korotky, "Three-electrode Ti:LiNbO₃ optical switch," IEEE J. Lightwave Technol., 4, 1324-28 (1986).
L. McCaughan and K. Choquette, "Crosstalk in Ti:LiNbO₃ directional coupler switches," IEEE J. Quant. Elect., 22, 947-51 (1986).
L. McCaughan and G. Bogert, "Integrated optical 4 x 4 Ti:LiNbO₃ crossbar switch array," Appl. Phys. Lett., 47, 348 (1985).
E.J. Murphy, T. Rice, L. McCaughan, and G. Harvey, "Permanent attachment of single mode fiber arrays to waveguides," IEEE J. Lightwave Technol., 3, 795 (1985).
L. McCaughan, "Long Wavelength Ti-doped LiNbO₃ Directional Coupler Optical Switches and Switch Arrays," invited, Optical Engineering Conf. Proc., 24, 241 (1985).
E. Bergmann, L. McCaughan, and J. Watson, "Coupling of intersecting Ti:LiNbO₃ diffused waveguides," Appl. Optics, 23, 3000 (1984).
L. McCaughan, "Low loss polarization-independent electro-optic switches at 1.3 µm wavelength," IEEE J. Lightwave Technol., 2, 51 (1984).
L. McCaughan and E. Bergmann, "Index distribution of optical waveguides from their Mode Profile," IEEE J. Lightwave Tech., 1, 241 (1983).
M.D. Feit, J.A. Fleck, and L. McCaughan, "Comparison of Calculated and Measured Performance of Diffused Channel Waveguide Couplers," J. Optical Soc. Amer., 73, 1296 (1983).
L. McCaughan and E.J. Murphy, "Influence of Temperature and Titanium Dimensions on Fiber-TiLiNbO₃ Waveguide Insertion Loss at 1.3 µm Fiber-Ti:LiNbO3 Wavelength," IEEE J. Quant. Elect., 19, 131 (1983).
L. McCaughan and E.J. Murphy, "Systematic examination of fabrication parameters for low insertion loss Ti-LiNbO₃ waveguides at 1.3 m," JOSA B, 72, 1821 (1982).
L. McCaughan and S. Krimm, "Biochemical Profiles of Membranes from X-ray and Neutron Diffraction Profiles," Biophys. J., 37, 417 (1982).
L. McCaughan and S. Krimm, "X-ray and Neutron Scattering Density Profiles of the Intact Human Red Blood Cell Membrane," Science, 207, 1481 (1980).
L. McCaughan and S. Krimm, "Electron Density Profile of the Intact Red Cell Membrane," Biophys. J., 25, 93A (1979).

		UW-Madison • College of Engineering
		Department of Electrical & Computer Engineering • Department Faculty Page

IPRG Home Research Highlights Ferroelectric Thin films Engineered Structures for Nonlinear Optics Clinical Applications of Spectroscopy Fiber Optic Mesh Networks Publications Intellectual Property Facilities Group Alumni Collaborating Partners Benefactors Contact Information		Leon McCaughan Research Group - UW Department of Electrical & Computer Engineering Leon McCaughan Integrated Photonics Research Group Department of Electrical & Computer Engineering MAJOR PUBLICATIONS C. Staus, T.F. Kuech, and L. McCaughan, "AlxGa1-xAs nested waveguide heterostructures for continuously phase-matched terahertz difference frequency generation," Optics Express, 18, 2332 (2010). C. Staus, T.F. Kuech, and L. McCaughan, "Continuously phase-matched THz difference frequency generation in an embedded-waveguide structure supporting only fundamental modes," Optics Express, 16, 13296 (2008). M. Bhardwaj, L. McCaughan, and S.K. Korotky, "Simulation and modeling of the restoration time for path based restoration schemes in planar mesh networks," J. Optical Networking, 5, 967 (2006). M. Bhardwaj, L. McCaughan, S.K. Korotky, and I. Saniee, "Analytical description of shared restoration capacity for mesh networks," J. Optical Networking, 4, 130 (2005). C. Staus, R. Suess, and L. McCaughan, "Laser-induced fracturing: An alternative to mechanical polishing and patterning of LiNbO₃ integrated optic chips," IEEE J. Lightwave Technol., 22, 1327 (2004). V. Joshkin, K. Dovidenko, S. Oktyabrsky, D. Saulys, T.F. Kuech, and L. McCaughan, "New methods for fabricating patterned lithium niobate for photonic applications," J. Crystal Growth, 259, 273-78 (2003). A. Chowdhury, C. Staus, B. Boland, T.F. Kuech, and L. McCaughan, "Experimental demonstration of 1535-1555 nm simultaneous optical wavelength interchange with a nonlinear photonic crystal," Optics Lett., 26, 1353 (2001). A. Chowdhury and L. McCaughan, "Figure of merit for near-velocity-matched traveling wave modulators," Optics Lett., 26, 1317 (2001). A. Chowdhury, S. Hagness, and L. McCaughan, "Simultaneous optical wavelength interchange with a two-dimensional second-order nonlinear photonic crystal," Optics Lett., 25, 832-34 (2000). A. Chowdhury and L. McCaughan, "Optical multiplication using a bisected intersecting waveguide," IEEE J. Lightwave Technol., 18, 688 (2000). A. Chowdhury and L. McCaughan, "Continuously phase-matched M-waveguides for second-order nonlinear upconversion," IEEE Photonics Technol. Lett., 12, 486 (2000). V. Joshkin, S. Oktyabrsky, P. Moran, D. Saulys, T.F. Kuech, and L. McCaughan, "Growth of oriented lithium niobate on silicon by alternating gas flow chemical beam epitaxy with metalorganic precursors," Appl. Phys. Lett., 76, 2125-27 (2000). D. Saulys, V. Joshkin, M. Khoudiakov, T.F. Kuech, A. Ellis, and L. McCaughan, "An examination of the surface decomposition chemistry of lithium niobate precursors under high vacuum conditions," J. Crystal Growth, 217, 287 (2000). C. Paulson, A. Ellis, L. McCaughan, B. Hawkins, J. Sun, and T.F. Kuech, "Demonstration of near-field scanning photoreflectance spectroscopy," Appl. Phys. Lett., 77, 1943-45 (2000). S. Jaloviar, J. Lin, F. Liu, V. Zielasek, L. McCaughan, and M. Lagally, "Step-induced optical anisotropy of vicinal Si(001)," Phys. Rev. Lett., 82, 791-94 (1999). E. Rudkevich, F. Liu, D. Savage, T.F. Kuech, L. McCaughan, and M. Lagally, "Hydrogen-induced Si surface segregation on Ge-covered Si(001)," Phys. Rev. Lett., 81, 3467-70 (1998). "Guided Wave and Integrated Optics" in Atomic, Molecular, and Optical Physics: Electromagnetic Radiation, eds. F. Dunning and R. Hulet, vol. 29C (1997). E. Rudkevich, D. Saulys, D. Gaines, T. F. Kuech, and L. McCaughan, "Adsorption and decomposition studies of t-butyl silane on Si(001) 2x1 surfaces using FTIR-ATR spectroscopy," Surface Sci., 383, 69 (1997). C. Huang and L. McCaughan, "980 pumped Er-doped LiNbO₃ waveguide amplifiers: A comparison with 1484 nm pumping," IEEE J. Selected Topics in Quant. Elect., 2, 367 (1997). C. Huang and L. McCaughan, "Polarization-dependent enhancement of population inversion and of green upconversion in Er:LiNbO¬₃ by Yb co-doping," IEEE Photonics Technol. Lett., 9, 599 (1997). C. Huang and L. McCaughan, "Photorefractive-damage-resistant Er-indiffused MgO:LiNbO₃ ZnO-waveguide amplifiers and lasers," Electronics Lett., 33, 1639-40 (1997). E. Rudkevich, D. Savage, W. Cai, J. Bean, J. Sullivan, S. Nayak, T.F. Kuech, L. McCaughan, and M. Lagally, "Extended spectral range Fourier transform infrared attenuated total reflection spectroscopy on Si surfaces using a novel Si coated Ge attenuated total reflection prism," J. Vacuum Sci. Technol. A, 15, 2153 (1997). D. Gill, J. Wright, and L. McCaughan, "Spectroscopic site determination in erbium-doped lithium niobate," Phys. Rev. B, 53, 2334 (1996). C. Huang and L. McCaughan, "Er-diffused Ti:LiNbO₃ channel waveguide optical amplifiers pumped at 980 nm," Electronics Lett., 32, 215 (1996). V. White, R. Ghodssi, C. Herdey, D. Denton, and L. McCaughan, "Use of photo-sensitive polyimide for deep x-ray lithography," Appl. Phys. Lett., 66, 2072 (1995). V. White, R. Ghodssi, G. Fish, C. Herdey, H. Liu, D. Denton, and L. McCaughan, "A new method for producing graded index PMMA waveguides," IEEE Photonics Technol. Lett., 7, 772 (1995). C. Huang, D. Gill, and L. McCaughan, "Evaluation of absorption and emission cross sections of Er-doped LiNbO₃ for application to integrated optic amplifiers," IEEE J. Lightwave Technol., 12, 803 (1994). D. Gill, J. Wright, and L. McCaughan, "Site characterization of rare-earth doped LiNbO₃ using total site selective spectroscopy," Appl. Phys. Lett., 64, 2483 (1994). "Guided Wave and Integrated Optics" in Methods of Experimental Physics, vol. III (1993). "Critical Materials Issues in the Performance and Manufacturability of LiNbO₃ Integrated Optics in Optical Engineering" in Integrated Optics and Optoelectronics, eds. M. Razeghi and K.K. Wong, SPIE Optical Engineering Press (1993). D. Gill, A. Judy, L. McCaughan, and J. Wright, "A method for the local incorporation of Er into LiNbO₃ guided wave optic devices by Ti co-diffusion," Appl. Phys. Lett., 60, 1067 (1992). K. Choquette, L. McCaughan, D. Misemer, J. Potts, and G. Vernstrom, "Tunable photoluminescence of uniformly doped short-period GaAs doping superlattices," J. Appl. Phys., 71, 2805 (1992). K. Choquette, D. Misemer, and L. McCaughan, "Electronic structure of short-period n-p GaAs doping superlattices," Phys. Rev. B, 43, 7040 (1991). D. Gill, L. McCaughan, and N. Agrawal, "A new mechanism for controlling the optical properties of intersecting waveguides: Fractionally doping the intersection region," IEEE J. Quant. Elect., 27, 588 (1991). E. True and L. McCaughan, "Large nonresonant light-induced refractive-index changes in thin films of amorphous arsenic sulfide," Optics Lett., 16, 458 (1991). "Low-loss Electro-optic Switches at 1.3 µm Wavelength" in Photonic Switching, eds. Hinton and Midwinter (1990). D. Gill, N. Agrawal, and L. McCaughan, "Reducing radiative loss in intersecting waveguides by fractionally doping the intersection region," IEEE Photonics Technol. Lett., 2, 887 (1990). K. Choquette, L. McCaughan, and D. Misemer, "Third-order optical susceptibility in short-period GaAs doping superlattices," J. Appl. Phys., 66, 4387 (1989). N. Agrawal and L. McCaughan, "Radiation losses in intersecting optical waveguides," J. Appl. Phys., 65, 4509 (1989). N. Agrawal and L. McCaughan, "Low-loss TiLiNbO₃ intersecting waveguides," Appl. Phys. Lett., 54, 1669 (1989). K. Choquette, L. McCaughan, and W.K. Smith, "Improved optical switching extinction in three-electrode Ti:LiNbO₃ directional couplers," Appl. Phys. Lett. 51, 2097 (1987). L. McCaughan, N. Agrawal, and G. Bogert, "Novel physical effects in intersecting waveguides," Appl. Phys. Lett., 51, 1389 (1987). L. McCaughan and K. Choquette, "Ti concentration inhomogeneities in Ti:LiNbO₃ waveguides," Optics Lett., 12, 567 (1987). N. Agrawal, L. McCaughan, and S. Seshadri, "A multiple scattering analysis of intersecting waveguides," J. Appl. Phys., 62, 2187 (1987). S.K. Korotky and L. McCaughan, "Control of section symmetry in reverse-directional coupler switches," Electronics Lett., 22, 1222 (1986). L. McCaughan and S.K. Korotky, "Three-electrode Ti:LiNbO₃ optical switch," IEEE J. Lightwave Technol., 4, 1324-28 (1986). L. McCaughan and K. Choquette, "Crosstalk in Ti:LiNbO₃ directional coupler switches," IEEE J. Quant. Elect., 22, 947-51 (1986). L. McCaughan and G. Bogert, "Integrated optical 4 x 4 Ti:LiNbO₃ crossbar switch array," Appl. Phys. Lett., 47, 348 (1985). E.J. Murphy, T. Rice, L. McCaughan, and G. Harvey, "Permanent attachment of single mode fiber arrays to waveguides," IEEE J. Lightwave Technol., 3, 795 (1985). L. McCaughan, "Long Wavelength Ti-doped LiNbO₃ Directional Coupler Optical Switches and Switch Arrays," invited, Optical Engineering Conf. Proc., 24, 241 (1985). E. Bergmann, L. McCaughan, and J. Watson, "Coupling of intersecting Ti:LiNbO₃ diffused waveguides," Appl. Optics, 23, 3000 (1984). L. McCaughan, "Low loss polarization-independent electro-optic switches at 1.3 µm wavelength," IEEE J. Lightwave Technol., 2, 51 (1984). L. McCaughan and E. Bergmann, "Index distribution of optical waveguides from their Mode Profile," IEEE J. Lightwave Tech., 1, 241 (1983). M.D. Feit, J.A. Fleck, and L. McCaughan, "Comparison of Calculated and Measured Performance of Diffused Channel Waveguide Couplers," J. Optical Soc. Amer., 73, 1296 (1983). L. McCaughan and E.J. Murphy, "Influence of Temperature and Titanium Dimensions on Fiber-TiLiNbO₃ Waveguide Insertion Loss at 1.3 µm Fiber-Ti:LiNbO3 Wavelength," IEEE J. Quant. Elect., 19, 131 (1983). L. McCaughan and E.J. Murphy, "Systematic examination of fabrication parameters for low insertion loss Ti-LiNbO₃ waveguides at 1.3 m," JOSA B, 72, 1821 (1982). L. McCaughan and S. Krimm, "Biochemical Profiles of Membranes from X-ray and Neutron Diffraction Profiles," Biophys. J., 37, 417 (1982). L. McCaughan and S. Krimm, "X-ray and Neutron Scattering Density Profiles of the Intact Human Red Blood Cell Membrane," Science, 207, 1481 (1980). L. McCaughan and S. Krimm, "Electron Density Profile of the Intact Red Cell Membrane," Biophys. J., 25, 93A (1979).

Leon McCaughan Integrated Photonics Research Group Department of Electrical & Computer Engineering

MAJOR PUBLICATIONS

Leon McCaughan
Integrated Photonics Research Group
Department of Electrical & Computer Engineering