Minimum power requirements for efficient four-wave mixing and self-focusing of electromagnetic beams in glasses and fluidsHELLWARTH, R. W.Physical review. A, General physics. 1985, Vol 31, Num 1, pp 533-536, issn 0556-2791Article

Contribution of holes to the photorefractive effect in n-type Bi₁₂SiO₂₀STROHKENDL, F. P; HELLWARTH, R. W.Journal of applied physics. 1987, Vol 62, Num 6, pp 2450-2455, issn 0021-8979Article

Optical phase conjugation by backscattering in barium titanateCHANG, T. Y; HELLWARTH, R. W.Optics letters. 1985, Vol 10, Num 8, pp 408-410, issn 0146-9592Article

Comparative study of photorefractive Bi₁₂SiO₂₀ crystalsSTROHKENDL, F. P; TAYEBATI, P; HELLWARTH, R. W et al.Journal of applied physics. 1989, Vol 66, Num 12, pp 6024-6029, issn 0021-8979Article

Anomalous optical transmission in homogeneous latex suspensionsTAM, P. W; HELLWARTH, R. W.Physical review. B, Condensed matter. 1991, Vol 43, Num 16B, pp 13314-13319, issn 0163-1829Article

Optical measurement of the photorefractive parameters of Bi₁₂SiO₂₀MULLEN, R. A; HELLWARTH, R. W.Journal of applied physics. 1985, Vol 58, Num 1, pp 40-44, issn 0021-8979Article

Spatial harmonics of photorefractive gratings in a barium titanate crystalLEE, Y. H; HELLWARTH, R. W.Journal of applied physics. 1992, Vol 71, Num 2, pp 916-923, issn 0021-8979Article

Temperature dependence of the electron mobility in photorefractive Bi₁₂SiO₂₀NOUCHI, P; PARTANEN, J. P; HELLWARTH, R. W et al.Journal of the Optical Society of America. B, Optical physics (Print). 1992, Vol 9, Num 8, pp 1428-1431, issn 0740-3224Conference Paper

Simple transient solutions for photoconduction and the space-charge field in a photorefractive material with shallow trapsNOUCHI, P; PARTANEN, J. P; HELLWARTH, R. W et al.Physical review. B, Condensed matter. 1993, Vol 47, Num 23, pp 15581-15587, issn 0163-1829Article

Effect of applied electric field on the buildup and decay of photorefractive gratingsJONATHAN, J.-M. C; HELLWARTH, R. W; ROOSEN, G et al.IEEE journal of quantum electronics. 1986, Vol 22, Num 10, pp 1936-1941, issn 0018-9197Article

Hole-electron competition in photorefractive gratingsSTROHKENDL, F. P; JONATHAN, J. M. C; HELLWARTH, R. W et al.Optics letters. 1986, Vol 11, Num 5, pp 312-314, issn 0146-9592Article

Indices governing optical self-focusing and self-induced changes in the state of polarization in N₂, O₂, H₂, and Ar gasesHELLWARTH, R. W; PENNINGTON, D. M; HENESIAN, M. A et al.Physical review. A, General physics. 1990, Vol 41, Num 5, pp 2766-2777, issn 0556-2791Article

Fidelity of optical phase conjugation by photorefractive degenerate four-wave mixing in barium titanateNAYLOR, D. L; TAM, P. W; HELLWARTH, R. W et al.Journal of applied physics. 1992, Vol 72, Num 12, pp 5840-5847, issn 0021-8979Article

Direct determination of electron mobility in photorefractive Bi₁₂SiO₂₀ by a holographic time-of-flight techniquePARTANEN, J. P; JONATHAN, J. M. C; HELLWARTH, R. W et al.Applied physics letters. 1990, Vol 57, Num 23, pp 2404-2406, issn 0003-6951Article

Nonlinear index of air at 1.053 μmPENNINGTON, D. M; HENESIAN, M. A; HELLWARTH, R. W et al.Physical review. A, General physics. 1989, Vol 39, Num 6, pp 3003-3009, issn 0556-2791, 7 p.Article

Picosecond nonlinear optical response of three rugged polyquinoxaline-based aromatic conjugated ladder-polymer thin filmsCAO, X. F; JIANG, J. P; BLOCH, D. P et al.Journal of applied physics. 1989, Vol 65, Num 12, pp 5012-5018, issn 0021-8979, 7 p.Article

Measurement of the complex polarizability of electron traps in Bi₁₂SiO₂₀ by a moving-grating techniquePING XIA; JONATHAN, J. M. C; PARTANEN, J. P et al.Optics letters. 1993, Vol 18, Num 21, pp 1780-1782, issn 0146-9592Article

Comparison between holographic and transient-photocurrent measurements of electron mobility in photorefractive Bi₁₂SiO₂₀PARTANEN, J. P; NOUCHI, P; JONATHAN, J. M. C et al.Physical review. B, Condensed matter. 1991, Vol 44, Num 4, pp 1487-1491, issn 0163-1829Article

Optical image processing by an atomic vapourBIAGGIO, I; PARTANEN, J. P; AI, B et al.Nature (London). 1994, Vol 371, Num 6495, pp 318-320, issn 0028-0836Article

Third-order optical nonlinearity of C₆₀, C₇₀, and CS₂ in benzene at 1.06 μmTANG, N; PARTANEN, J. P; HELLWARTH, R. W et al.Physical review. B, Condensed matter. 1993, Vol 48, Num 11, pp 8404-8408, issn 0163-1829Article