Our current research activities are in the following areas:
1) Spectroscopy: Vibrational characterisation of (i) nucleic acid bases and their derivatives,(ii) molecules of medicinal importance and (iii) organic- and super-conductors� classes, using IR and Raman spectroscopy and DFT computations employing the Gaussian soft-wares 03 and 09 versions. .
Electromagnetism: Studies of spherical dielectric resonators with metallic shields.
2) Non-linear Optical Properties of Photorefractive Materials:
Photorefractive materials are very important class of materials in the sense that these offer a medium for the non-linear interaction of two or more light waves. Such interactions lead to many important applications of these materials. We have recently started working in this area and are presently involved in the study of some resonators.
3) Optical solitons: Incoherently coupled spatial solitons; Coherently coupled soliton pairs; Coherently coupled soliton pairs effect

Awards:

• National Merit Scholarship holder from High School to M. Sc. (1972-1978)
• Gold Medal Recipient for standing first at the B. Sc. III Examination 1976 of Banaras Hindu University
• Life-Member, Laser and Spectroscopy Society of India
• Life-Member, Indian Association of Physics Teachers
• Life-Member, Indian Physics Association

University Grants Commission, New Delhi supported project on " Vibrational study of some tri-fluoro - anilines , benzonitriles and benzoic acids" (2005-2008: ~ Rs. 5 lacs)

• Reviewer, Spectrochimica Acta Part A
• Reviewer Vibrational Spectroscopy
• Reviewer , J. Optical Soc. Am
• Reviewer, Opt. .Laser Tech
• Reviewer, J. Mol. Struct.
• Reviewer, J. Mol. Struct.(Theochem)

List of 10 major Publications:

1. Polarized Raman and infrared spectra and vibrational analysis for a Naphthylamine R. Shanker, R. A. Yadav, I. S. Singh and O. N. Singh Pramana (India)24, 749-755 (1985).
2. Vibrational spectrum, force field calculations, thermodynamic functions and barrier to internal rotation for benzoyl fluoride R. A. Yadav, R. Shanker, S. Ram and I. S. Singh Spectrochim. Acta.(G.B.) 43A, 901-910 (1987)
3. Raman scattering in magnetic materials R. A. Yadav Proc. Ind. Acad. Sci. (Chem. Sci.) 102, 629-634 (1990)
4. Force fields for C = N substituted benzenes : II. Planar and non-planar modes of the three isomeric di-cyanobenzenes D. N. Singh, J. S. Singh and R. A. Yadav J. Raman Spectrosc.(G.B.) 28, 355-362 (1997)
5. Force field calculations and re-assignments of Raman and IR frequencies of pyrazine- N,N'-dioxide R. A. Yadav , V Mukherjee, Manoj Kumar and Rashmi Singh Spectrochim. Acta (G.B.) 66A, 964-971(2007)
6. Infrared and ab initio studies of conducting molecules: 2,5-Diamino-3,6-dichloro-1,4- Benzoquinone R. L. Prasad, A. Kushwaha, Suchita, M. Kumar and R. A. Yadav Spectrochim. Acta (G.B.) Part A, 69(2), 304-311(2008)
7. DFT study of molecular geometries and vibrational characteristics of uracil and its thio- derivatives and their radical cations R. Singh, S. Jaiswal, M. Kumar, P. Singh, G. Srivastav and R. A. Yadav Spectrochim. Acta(G.B.) Part A, 75(1), 267-276 (2010)
8. ab initio Determination of Geometries and Vibrational Characteristics of Building Blocks of Organic Superconductors: 4,5-ethylenedithio-1,3-dithiole-2-thione, and 4,5- ethylenedithio-1,3-dithiole-2-one S. Jaiswal, Deepshikha Singh, R.L. Prasad and R.A. Yadav Spectrochimica Acta(G.B.) Part A, 76(3-4),297-310(2010)
9. Minimization of the fluctuation in the signal beam intensity of a nonlinear optical medium with a transmission grating Opt. .Laser Tech. 42(5), 775-782(2010) M. K. Maurya, T. K. Yadav and R. A. Yadav
10. Effect of photoconductivity and dielectric constant of the photorefractive materials on two-beam coupling gain and phase-shifts for a single unidirectional photorefractive ring resonator Opt. .Laser Tech., 42(6), 883-893(2010) M.K. Maurya , R.A. Yadav

1. Vibrational spectra of three isomeric amino benzonitriles S. Ram, R. A. Yadav and J. S. Yadav The J. Sci. Res., BHU (India) 30(1), 207-226 (1980-81)
2. Raman and infrared spectra of terephthalaldehyde R. A. Yadav, Ramakant, P. C. Mishra and I. S. Singh Pramana (India) 18, 311-315 (1982)
3. Raman and infrared spectra of 1,3-bis-(trifluoromethyl) benzene R. A. Yadav, Shyampati, N. P. Singh and I. S. Singh Ind. J. Pure Appl. Phys.20, 674-676 (1982)
4. Raman and infrared spectra of 3-fluoro trifluoromethyl benzene R. A. Yadav and I. S. Singh Ind. J. Pure Appl. Phys. 20, 677-680 (1982)
5. Raman spectrum of phthalaldehyde R. A. Yadav and I. S. Singh The J. Sci. Res. BHU (India) 33(2), 1-4 (1982-83)
6. Raman and infrared spectra and normal coordinate analysis for 1,2-di-iodo tetrafluorobenzene R. A. Yadav, I. S. Singh and O. Sala J. Raman Spectrosc. (G.B.) 14,353-357 (1983).
7. Vibrational spectra of o- and m-ethyl phenols R. A. Yadav and I. S. Singh The J. Sci. Res., BHU (India) 33(2), 133-144 (1982-83)
8. Vibrational studies of o-, m- and p-trifluoromethyl benzaldehydes R. A. Yadav and I. S. Singh Ind. J. Phys. 58B,556-569(1984).
9. Vibrational studies of trifluoromethyl benzene derivatives: p-trifluoromethyl aniline R. A. Yadav and I. S. Singh Spectrochim. Acta (G.B.) 41A, 191-197 (1985)
10. Vibrational spectra and normal coordinate analysis for substituted trifluoromethyl benzenes R. A. Yadav and I. S. Singh Proc. Ind. Acad. Sci. (Chem. Sci.) 95, 471-487 (1985)
11. Polarized Raman and infrared spectra and vibrational analysis for a Naphthylamine R. Shanker, R. A. Yadav, I. S. Singh and O. N. Singh Pramana (India)24, 749-755 (1985).
12. Normal coordinate analysis for 2,4,6-trichlorophenol R. A. Yadav, R. Shanker and I. S. Singh Ind. J. Pure Appl. Phys. 23, 522-524 (1985)
13. Polarized Raman and infrared spectra of 2-chloro, 6-methyl aniline R. Shanker, R. A. Yadav, I. S. Singh and O. N. Singh Ind. J. Pure Appl. Phys. 23, 343-345 (1985)
14. Hydrogen bonding in o- and m-ethyl phenols R. A. Yadav and I. S. Singh Ind. J. Pure Appl. Phys. 23, 627-627 (1985)
15. Some comments on electronic and vibrational spectra and thermodynamic functions of dihalogen toluenes R. A. Yadav Spectrochim. Acta (G.B.) 42A, 689-691 (1986)
16. ab initio calculations of fundamental frequencies for isomeric di-fluorobenzenes O. P. Singh, J. S. Yadav and R. A. Yadav Proc. Ind. Acad. Sci.(Chem. Sci.) 99, 159-166 (1987)
17. Vibrational spectrum of 1,2,4,5-tetrabromobenzene R. A. Yadav and R. Shanker J. Raman Spectrosc.(G.B.) 18, 555-559 (1987)
18. Vibrational spectrum, force field calculations, thermodynamic functions and barrier to internal rotation for benzoyl fluoride R. A. Yadav, R. Shanker, S. Ram and I. S. Singh Spectrochim. Acta.(G.B.) 43A, 901-910 (1987)
19. Vibrational studies of biomolecules . I. 2-thio-uracil R. A. Yadav, P. N. S. Yadav and J. S. Yadav Proc. Ind. Acad. Sci. (Chem. Sci.) 100, 69-78 (1988)
20. Vibrational studies of biomolecules . II. 2-thio-cytosine R. A. Yadav, P. N. S. Yadav and J. S. Yadav Spectrochim. Acta.(G.B.) 44A, 1201-1206 (1988)
21. Raman scattering in magnetic materials R. A. Yadav Proc. Ind. Acad. Sci. (Chem. Sci.) 102, 629-634 (1990)
22. Infrared spectrum of N-t-BOC-Alanyl-Proline K. Singh, R. A. Yadav and I. S. Singh Ind. J. Phys. 65B, 277-282 (1991)
23. Force fields of carbonic-di-halides K. Singh, R. A. Yadav and D. K. Rai Ind. J. Phys. 65B, 283-285 (1991)
24. Vibrational studies of bio-molecules. III. 6-thio-guanine K. Singh, R. A. Yadav and J. S. Yadav Spectrochim. Acta (G.B.) 47A, 819-820 (1991)
25. Vibrational spectra, thermodynamic functions and barrier to internal rotation for isomeric tri-fluoromethyl benzoylchlorides Shanker, R. A. Yadav, I. S. Singh and O. N. Singh J. Raman Spectrosc.(G.B.) 23, 141-146 (1992)
26. Force fields for benzoylchloride : I-Vibrational assignments of non-planar modes revisited R. A. Yadav Spectrochim. Acta (G.B.) 49A, 891-895 (1993)
27. Surface enhanced Raman scattering of 2-cyanopyridine adsorbed on silver colloidal particle-comment, R. A. Yadav Pramana (India) 40, C415 (1993)
28. Vibrational studies, barrier height and thermodynamic functions for biomolecules: 5-trifluoromethyl uracil R. Shanker, R. A. Yadav and I. S. Singh Spectrochim. Acta (G.B.) 50A, 1251-1258 (1994)
29. Direction-cosines for barrier height determination: A general formalism R. Shanker and R. A. Yadav Asian J. Phys. (India) 5, 225-229 (1996)
30. IR and Raman spectra, force fields, barrier heights against internal rotations and Thermodynamic functions for isomeric trifluoromethyl anilines D. N. Singh, R. Shanker, R. A. Yadav and I. S. Singh J. Raman Spectrosc.(G.B.), 27, 177-184 (1996).
31. Laser Raman and IR spectra and force fields for 2,6-difluorobenzonitrile V. K. Rastogi, C. B. Arora, S . K. Singhal , D. N. Singh and R. A. Yadav Spectrochim. Acta (G.B.) 53A, 2505 (1997)
32. Force fields for C = N substituted benzenes : I. Force fields for benzonitrile D. N. Singh and R. A. Yadav Asian J. Phys. (India) 6, 369-377 (1997)
33. Force fields for C = N substituted benzenes : II. Planar and non-planar modes of the three isomeric di-cyanobenzenes D. N. Singh, J. S. Singh and R. A. Yadav J. Raman Spectrosc.(G.B.) 28, 355-362 (1997)
34. Force fields for CHO substituted benzenes : I. Planar and non-planar modes of benzaldehyde D. N. Singh and R. A. Yadav Asian Chem. Lett.(India) 2, 65-73 (1998).
35. Force fields for planar and non-planar modes of fluorobenzene revisited J. S. Singh D. N. Singh and R. A. Yadav Ind. J. Pure Appl. Phys. 37, 97-103 (1999)
36. Force field for planar modes of fluorobenzene revisited J. S. Singh D. N. Singh and R. A. Yadav Asian J. Phys.(India) 9, 45-50 (2000)
37. FT-Raman spectrum and ab-initio and density functional computations of the vibrational spectrum, molecular geometry, atomic charges and some molecular properties of anti-carcinogenic drug: 5-fluorouracil V. K. Rastogi, C. B. Arora, R. A. Yadav, C. Singh and M. A. Palafox J. Raman Spectrosc.(G.B.) 31, 595-604(2000)
38. Laser Raman and IR spectra and force fields for 2,4-dichlorobenzonitrile V. K. Rastogi, V. Jain, M. A. Palafox, D. N. Singh and R. A. Yadav Spectrochim. Acta (G.B.) 57A, 209-216 (2001)
39. Vibrational studies of trifluoromethyl benzene derivatives I: 2-amino-5-chloro and 2- amino-5-bromo benzotrifluorides N. P. Singh and R. A. Yadav Ind. J. Phys. 75B(4), 347-355 (2001)
40. Vibrational spectra and force fields for 2, 3-; 2, 4-; 2, 5- and 3, 4-dihydroxy-benzaldehydes D.N. Singh, I. D. Singh and R. A. Yadav Ind. J. Phys. (India) 76B, 35-46 (2002)
41. Infrared and Raman spectral studies and evaluation of force fields for the three isomeric methoxy benzaldehydes D. N. Singh, I. D. Singh and R. A. Yadav Ind. J. Phys. 76B,307-318 (2002).
42. Vibrational studies of trifluoromethyl benzene derivatives II: 5-amino-2-fluoro and 5- amino-2-chloro benzotrifluorides R. K. Yadav, N. P. Singh and R. A. Yadav Ind. J. Phys. 77B, 419-425(2003 ).
43. Vibrational spectra and force field calculations for 2-amino-5-chloro- and 2-amino-5-bromo- benzotrifluorides R. A. Yadav, R. K. Yadav and N. P. Singh Spectrochim. Acta (G.B.) 64A, 454-463(2006)
44. Normal modes and quality factors of homogeneous isotropic spherical dielectric resonators : I- shielded dielectric sphere. I. D. Singh and R. A. Yadav Pramana (India) 62,1255-1271(2004)
45. Force field calculations and re-assignments of Raman and IR frequencies of pyrazine- N,N'-dioxide R. A. Yadav , V Mukherjee, Manoj Kumar and Rashmi Singh Spectrochim. Acta (G.B.) 66A, 964-971(2007)
46. Infrared and ab initio studies of conducting molecules: 2,5-Diamino-3,6-dichloro-1,4-benzoquinone Spectrochim. Acta (G.B.) Part A, 69(2), 304-311(2008) R. L. Prasad, A. Kushwaha, Suchita, M. Kumar and R. A. Yadav
47. Quantum chemical determination of molecular geometries and interpretation of FTIR and Raman spectra for 2,3,4-and 2,3,6-tri-fluoro-benzonitriles Vib. Spectrosc., 47(1), 26-37(2008) V. Mukherjee, Karunakar Singh, N. P. Singh and R. A. Yadav
48. ab initio determination of molecular geometries and vibrational frequencies of CX3 COOH (X = H, F, Cl, Br) Spectrochim. Acta (G.B.) Part A, 71(4), 1565-1570(2008) R. A. Yadav, M. Kumar, R. Singh, P. Singh, S. Jaiswal, G. Srivastav, R. L. Prasad
49. Quantum chemical determination of molecular geometries and interpretation of FTIR and Raman spectra for 2,4,5- and 3,4,5-tri-fluoro-benzonitriles Spectrochim. Acta (G.B.) Part A, 71(4), 1571-1580(2008) V. Mukherjee, Karunakar Singh, N. P. Singh and R. A. Yadav
50. FTIR and Raman spectra and SQM force field calculation for vibrational analysis of 2,3,4- and 2,3,6-tri-fluoro-anilines Spectrochim. Acta (G.B.) Part A, 73(1), 44-53(2009) V. Mukherjee, Karunakar Singh, N. P. Singh and R. A. Yadav
51. FTIR and Raman spectra, DFT and normal coordinate computations of 2,4,5- and 2,4,6-tri-fluoroanilines Spectrochim. Acta (G.B.) Part A, 73(2), 249-256(2009) V. Mukherjee, N. P. Singh and R. A. Yadav
52. Normal modes and quality factors of shielded composite dielectric spherical resonators R. A. Yadav ,T. K. Yadav, M. K. Maurya, D. P. Yadav and N. P. Singh Ind. J. Phy. , 83(10) (2009) 1421-1438.
53. Structural and vibrational studies of molecular conductors using quantum mechanical methods: 1,3-Dithiole-2-thione, 1,3-dithiole-2-one, 1,3-dioxole-2-one and 1,3-dioxole-2-thione Spectrochim. Acta (G.B.) Part A, 74(1),16-25(2009) S. Jaiswal, A. Kushwaha, R. Prasad, R. L. Prasad and R. A. Yadav
54. Energetics and structural insights of molecular conductors using density functional theory methods : 1,3�dithiole-2-thione, 1,3-dithiole-2-one, 1,3-dioxole-2-one and 1,3-dioxole-2-thione J. Theo. Comp. Chem., 8(6), 1485-1495 (2009) R. L. Prasad, A. Kushwaha, Rajendra Prasad, S. Jaiswal and R. A. Yadav
55. Experimental and calculation aspects of vibrational spectra and optimized geometry of 2,3,4-tri-fluoro-benzoic acid dimer Spectrochim. Acta (G.B.) Part A, 74(5),1107-1114(2009) V. Mukherjee, N. P. Singh and R. A. Yadav
56. Dependence of gain and phase-shift on crystal parameters and pump intensity in unidirectional photorefractive ring resonators M.K. Maurya, T. K. Yadav and R. A. Yadav Pramana, J. of Phy., 72 (4) (2009) 709-726
57. Oscillation dependence of two-wave mixing gain for unidirectional ring resonator in photorefractive materials M. K. Maurya, T. K. Yadav and R. A. Yadav Opt. Laser Tech., 42(3) (2010) 465-476
58. Minimization of the fluctuation in the signal beam intensity of a nonlinear optical medium with a transmission grating M. K. Maurya, T. K. Yadav and R. A. Yadav Opt. .Laser Tech. 42(5) (2010)775-782
59. Study of modulation instability in a temporally incoherent photorefractive ring resonator below the threshold with incoherent light M. K. Maurya, T. K. Yadav, Ruchi Singh, R. A. Yadav and D. P. Singh Opt. Comm. ,283(11) (2010) 2416-2424
60. Feedback method of the noise suppression in wave-mixing amplifiers based on non-linear materials with photorefractive response in a reflection grating configuration M.K. Maurya, R.A. Yadav Opt. Comm, 283(12) (2010) 2615-2621
61. Effect of photoconductivity and dielectric constant of the photorefractive materials on two-beam coupling gain and phase-shifts for a single unidirectional photorefractive ring resonator M.K. Maurya , R.A. Yadav Opt. Laser Tech., 42(6) (2010) 883-893
62. FTIR and Raman spectra, DFT and SQMFF calculations for geometrical interpretation and vibrational analysis of some trifluorobenzoic acid dimers Vib. Spectrosc., 52( 2), 163-172 ( 2010) V. Mukherjee, N.P. Singh and R. A. Yadav
63. DFT study of molecular geometries and vibrational characteristics of uracil and its thio-derivatives and their radical cations Spectrochim. Acta(G.B.) Part A, 75(1), 267-276 (2010) R. Singh, S. Jaiswal, M. Kumar, P. Singh, G. Srivastav and R. A. Yadav
64. ab initio studies of molecular structures, conformers and vibrational spectra of heterocyclic organics: I. Nicotinamide and its N-oxide Spectrochimica Acta(G.B.) Part A, 75(1),281-292(2010) M. Kumar, S. Jaiswal, R. Singh, G. Srivastav, P. Singh, T. N. Yadav and R. A. Yadav
65. ab initio Determination of Geometries and Vibrational Characteristics of Building Blocks of Organic Superconductors: 4,5-ethylenedithio-1,3-dithiole-2-thione, and 4,5-ethylenedithio-1,3-dithiole-2-one Spectrochimica Acta(G.B.) Part A, 76(3-4),297-310(2010) S. Jaiswal, Deepshikha Singh, R.L. Prasad and R.A. Yadav
66. Vibrational study on the molecular structure of 1,4-napthoquinone and 2- methyl-1,4-napthoquinone and their radical anions by using density functional theory. J. Chem.. Pharmacy. Res. 2(2010) 199-224 Priyanka Singh, N.P. Singh and R.A.Yadav
67. Study of the optimized molecular structures and vibrational characteristics of neutral L-Ascorbic acid and its anion and cation using density functional theory J. Chem.. Pharmacy. Res. 2(2010) 656-681 Priyanka Singh, N.P. Singh and R.A.Yadav
68. FTIR and Raman spectra and optimized geometry of 2,3,6-tri-fluorobenzoic acid dimer: A DFT and SQMFF study V. Mukherjee, N.P. Singh, R.A. Yadav Spectrochimica Acta Part A 77(4), 787-794 (2010)
69. Quantum mechanical studies of conformers, molecular structures and vibrational characteristics of heterocyclic organics: Nicotinic acid and 2- fluoronicotinic acid Priyanka Singh, N.P. Singh and R.A.Yadav J. Chem.. Pharmacy. Res. (2011)
70. Comparative structural and vibrational studies of 6-amino purine (Guanine) and its radical species using density functional theory. Rashmi Singh, M.Kumar,, P.Singh, and R.A.Yadav J. Chem.. Pharmacy. Res. 3 (2011) 25-37
71. Oscillation characteristics of a coupled unidirectional ring resonators with Photorefractive crystals M.K. Maurya, T.K. Yadav, Dheerendra Yadav and R.A. Yadav Opt. Laser Tech., 43(7) (2011) 1041-1053
72. Effect of photoconductivity and oscillation frequency shift on the signal beam intensity in two beam coupling in photorefractive materials T. K. Yadav, M. K. Maurya, and R.A. Yadav Optik 122 (2011) 1607-1614.
73. Dependence of space charge field and gain coefficient on the applied electric field in photorefractive materials Ruchi Singh , M. K. Maurya, T. K. Yadav, R. A. Yadav and D. P. Singh Opt. Laser Tech., 43(1) (2011) 95-101
74. Luminescence and second harmonic generation in Eu3+/Eu2+ embedded B2O3: LiNbO3 non-linear glass�ceramics. T. K. Yadav, A.K.Singh, K.Kumar and R.A. Yadav Optical material, 33 (2011) 1732�1736
75. Experimental IR and Raman Spectra and quantum chemical studies of molecular structures, conformers and vibrational characteristics of L- ascorbic acid and its anion and cation. R.A.Yadav, Poonam Rani, Priyanka Singh, M Kumar, R.Singh, N.P.Singh Spectrochim Acta 84(2011)6-21.
76. Experimental IR and Raman Spectra and quantum chemical studies of molecular structures, conformers and vibrational characteristics of nicotinic acid and its N-oxide. M.Kumar, R.A.Yadav Spectrochim Acta 79(2011) 1316�1325
77. Optimized geometry and vibrational spectra and NBO analysis of solid state 2,4,6 - tri-fluorobenzoic acid hydrogen bonded dimer V. Mukherjee, N.P. Singh, R.A. Yadav Journal of Molecular Structure, Volume 988, Issues 1-3, 24-34 (2011)
78. Vibrational studies and electron-molecular vibrational coupling of tetrafluorotetracyanoquinodimethane P. Rani , R.A. Yadav Bulletin of Laser and Spectroscopy Society of India, ISSN:2229-3752; Special issue dedicated to late Prof. D. K. Rai, 19, 97-112(2011-2012)
79. Dynamic study of the gain in two beam coupling in photorefractive materials T. K. Yadav, M. K. Maurya, and R.A. Yadav Optik, 123 (2012) 1329�1335.
80. Pattern formation in a passive incoherent ring resonator system based on nonlinear material with the self-focusing non-instantaneous Kerr response M.K. Maurya, R.A. Yadav Optics & Laser Technology, 44 (2012) 505-513
81. Study of photoconductive and dielectric dependence of gain and phase-shift in the coupled unidirectional ring resonators based on non-degenerate wave-mixing in photorefractive materials M.K. Maurya, R.A. Yadav Optics & Laser Technology, 44 (2012) 1191-1202
82. Enhancement of the diffraction efficiency of the hologram recorded in photorefractive media under the action of external electric field. T. K. Yadav, M. K. Maurya, and R.A. Yadav Optik, 123 ( 2012) 1120�1127.
83. Frequency detuning dependence of oscillation condition for a semilinear photorefractive optical resonator in a photorefractive material with reflection gratings M.K. Maurya, R.A. Yadav Optik, 123 (2012) 1260-1270
84. ab initio determination of geometries and vibrational characteristics of building blocks of organic super-conductors: TTF and its derivatives P. Rani, R.A. Yadav Spectrochimica Acta Part A, 99, 2012, 303-315
85. DFT study of vibrational spectra of 2-(2-hydroxyphenyl) Benzothiazole U. Pandey, R. P. Singh, M. Srivastava, R. A. Yadav Bulletin of Laser and Spectroscopy Society of India, ISSN:2229-3752;Special issue dedicated to late Prof. A. N. Singh, 20, 57-70(2012-2013)
86. Theoretical analysis of the effects of frequency detuning dependence of photorefractive two- beam coupling coefficient on gain and phase-shifts of the signal beam for a coupled unidirectional photorefractive ring resonator M.K. Maurya, R.A. Yadav Optik, 124 (2013) 313-323
87. Theoretical study of properties of BaTiO3 material with grating spacing and light intensity Ruchi Singh, D.P. Singh, R.A. Yadav Optik, 124 (2013) 466-469
88. Photovoltaic dependence of photorefractive grating on the externally applied dc electric field M.K. Maurya, R.A. Yadav Optics & Laser Technology, 47 (2013) 10-21
89. Two wave mixing in nonlinear Kerr medium and its dependence on photoconductivity and dielectric properties of the medium. T. K. Yadav, M. K. Maurya, and R.A. Yadav Optik,, 124 (2013) 876�882.
90. Effect of grating spacing on response time and sensitivity In photorefractive materials at large modulation depth Ruchi Singh, D. P. Singh, and R. A. Yadav Journal of Russian Laser Research, 34 (2) (2013) 185-191
91. Comparative study of signal to noise ratio and gain in photorefractive materials Ruchi Singh, R.A. Yadav and D. P. Singh Journal of Russian Laser Research, 34 (6) (2013) 509-514
92. Vibrational studies of benzene, pyridine, pyridine-N-oxide and their cations M. Kumar, Mayuri Srivastava, R.A. Yadav Spectrochimica Acta Part A, 111, 2013, 242-251
93. Experimental and theoretical studies of vibrational spectrum and molecular structure and related properties of pyridoxine (vitamin B6) Mayuri Srivastava, P. Rani, N.P. Singh, R.A. Yadav Spectrochimica Acta Part A 120, 2014, 274-286
94. Experimental Raman and IR spectral and theoretical studies of vibrational spectrum and molecular structure of Pantothenic acid (vitamin B5) Mayuri Srivastava, N.P.Singh, and R.A.Yadav Spectrochimica Acta Part A 129, 2014, 131-142
95. Synthesis, characterization and quantum chemical investigation of molecular structure and vibrational spectra of 2,5-dichloro-3,6-bis-(methylamino)1,4-benzoquinone B. P. S. Gautam, Mayuri Srivastava, R. L. Prasad and R.A. Yadav Spectrochimica Acta Part A 129, 2014, 241-254
96. DFT Study of Conformational and Vibrational Characteristics of 2-(2-Hydroxyphenyl) Benzothiazole Molecule Urmila Pandey, Mayuri Srivastava, R.P.Singh and R.A.Yadav Spectrochimica Acta Part A 129, 2014, 61-73
97. Raman and IR studies and DFT calculations of the vibrational Spectra of 2, 4-Dithiouracil and its cation and anion R. Singh and R. A. Yadav Spectrochimica Acta Part A 130, 2014, 188-197
98. Investigation of crystal structure, vibrational characteristics and molecular conductivity of 2,3-dichloro-5,6-dicyno-p-benzoquinone P.Rani and R.A.Yadav Spectrochimica Acta Part A 137, 2015, 1334-1347
99. Synthesis, Characterization, Single Crystal Structural Studies, Antibacterial Activity and DFT Investigations of 2-Chloro -5- Ethoxy -3,6- Bis (Methylamino)�1,4-Benzoquinone B. P. S. Gautam , R. K. Dani , R. L. Prasad, Mayuri Srivastava , R. A. Yadav and M. Gondwal Pharm. Anal. Acta, 6:9, (2015), doi: 10.4172/2153-2435.1000418
100. Vibrational Studies and DFT Calculations of Cytosine, Thiocytosine and Their Cations and Anions R.A. Yadav, Rashmi Singh and Mayuri Srivastava Pharm. Anal. Acta, 6:9, (2015), doi: 10.4172/2153-2435.1000419
101. Raman and IR Spectral and DFT Based Vibrational and Electronic Characterization of Isolated and Zwitterionic Forms of L-Tyrosine RA Yadav, V Dixit, M Yogesh and C Santhosh Pharm. Anal. Acta, 6: 439. (2015) doi:10.4172/21532435.1000439
102. Experimental IR and Raman Spectroscopy and DFT Methods Based Material Characterization and Data Analysis of 2- Nitrophenol V Dixit and RA Yadav Biochem. and Pharmaco. (Los Angeles), 4 183(2015). doi:10.4172/2167-0501.1000183.
103. DFT-B3LYP computations of electro and thermo molecular characteristics and modeof action of fungicides (chlorophenols) V Dixit and RA Yadav Int. J. Pharmaceutics 491 (2015) 277�284
104. Experimental and DFT Investigation of Vibrational and Molecular Structural Characteristics of Thiamine (Vitamin B1) Mayuri Srivastava, N. P. Singh and R. A. Yadav Biochem Anal Biochem 2015, 4:4, 1000229; doi:10.4172/2161-1009.1000229
105. Structural and vibrational investigations of a neurotransmitter molecule: Serotonin (5-hydroxy tryptamine) Omkant Jha and RA Yadav J. Mol. Struct. 1123 (2016) 92-110
106. Resonant and normal modes behavioral studies of shielded dielectric spherical shell resonator D.P. Yadav, M.K. Maurya, R.A. Yadav, N.P. Singh Optik 127 (2016) 5520�5533
107. Coherently coupled pyroelectric photovoltaic solitons in photorefractive media Aavishkar Katti, R. A. Yadav Int. J.. Adv. Tech. . Engg and Sc. 4(9) (2016) 272-282
108. Coupled Spatial solitons in Multiple Quantum Well Planar Waveguides Aavishkar Katti and R. A. Yadav OSA Technical Digest (online) (Optical Society of America, 2016), paper Tu3D.3
109. Comparative structural and vibrational study of the four lowest energy conformers of Serotonin Omkant Jha, TK Yadav and RA Yadav Spectrochimica Acta Part A 173(2017)307-317
110. Theoretical Investigation of Incoherently Coupled Solitons in CentrosymmetricPhotorefractive Crystals Aavishkar Katti , R. A. Yadav and D. P. Singh Optik-International Journal for Light and Electron Optics 136(2017)89-106
111. Coupling effects for separate grey spatial solitons in a biased series photorefractive crystal circuit with both the linear and quadratic electro-optic effects Opt Quant Electron (2017) 49:36 DOI 10.1007/s11082-016-0887-1
112. Modulation instability of broad optical beams in unbiased photorefractive pyroelectriccrystals Aavishkar Katti and R. A. Yadav Chaos, Solitons and Fractals 101(2017) 20�23
113. Incoherently coupled photorefractive spatial solitons supported by pyroelectric effects Aavishkar Katti and R. A. Yadav J. Nonlinear Optical Phys. & Materials 26 (1) (2017) 1750002 (17pages)
114. Spatial solitons in biased photovoltaic photorefractive materials with the pyroelectric effect Aavishkar Katti and R. A. Yadav Physics Letters A 381(3) (2017), 166�170
115. Structural and vibrational investigation of neurotransmitter molecule: Dopamine {4-(2-Aminoethyl) benzene 1,2 diol} Omkant Jha, T. K. Yadav and R. A. Yadav, Spectrochimica Acta Part A 189 (2018) 473-484
116. Conformational and vibrational investigations of L-Tryptophan zwitterion R. A. Yadav, M. Yogesha, Bhoopendra Yadav and Santhosh C J .Mol. Struct. 1171(2018)867-879
117. Bright optical spatial solitons in photorefractive waveguides having both the linear and quadratic electro-optic effect Aavishkar Katti and R.A. Yadav and Awadhesh Prasad Wave Motion 77 (2018) 64�76
118. Structural and vibrational characteristics and vibronic coupling of tetra-methyl, tetra-selenafulvalene P Rani, G Rajput, M Srivastava, RA Yadav J. Mol. Struct. 1175 (2019) 1-12
119. Electromagnetic field analysis of Shielded Composite Dielectric Spherical Shell Resonator in Infrared and Visible regions D. P. Yadav, M. K. Maurya, R. A. Yadav J. Quant. Spectrosc. Radiative Transfer 224 (2019) 415-430; doi:10.1016/j.jqsrt.2018.12.001