Publications

  1. Ultrafast Zero-bias Surface Photocurrent in Germanium Selenide: Promise for Terahertz Devices and Photovoltaics,” K. Kushnir, Y. Qin, Y. Shen, G. Li, B.M. Fregoso, S. Tongay, L.V. Titova, ACS Appl. Mater. Interfaces 11, 5492 (2019).
  2. “Equilibrium and non-equilibrium free carrier dynamics in two-dimensional Ti3C2Tx MXenes: THz spectroscopy study,” G. Li, K. Kushnir, Y. Dong, S. Chertopalov, A.M. Rao, V.N. Mochalin, R. Podila and L.V. Titova, 2D Materials  5, 035043 (2018).
  3. “Dynamics of Photoexcited Carriers in Polycrystalline PbS and at PbS/ZnO Heterojunctions: Influence of Grain Boundaries and Interfaces,” K. Kushnir, K. Chen, L. Zhou, B. Giri, R. Grimm, P.M. Rao, and L.V. Titova, J. Phys. Chem. C   122, 11682 (2018).
  4. “Enhancement of hot-carrier photoluminescence with intense terahertz pulses,” D.N. Purschke, M. Na, A. Longman, L.V. Titova, and F.A. Hegmann, Appl. Phys. Lett. 112, 072105 (2018).
  5. “Microscopic origin of the Drude-Smith model,” T. L. Cocker, D. Baillie, M. Buruma, L. V. Titova, R. Sydora, F. Marsiglio, and F. A. Hegmann,  Phys. Rev. B., 96, 206439 (2017).
  6. Enhancing the Solar Energy Conversion Efficiency of Solution-Deposited Bi2S3 Thin Films by Annealing in Sulfur Vapor at Elevated Temperature,” Z. Zhu, S.K. Iyemperumal, K. Kushnir, A.D. Carl, L. Zhou, D. Brodeur, R. Grimm, L.V. Titova, N.A. Deskins, P.M. Rao, Sustainable Energy & Fuels, 1, 2134 (2017).
  7. “Ultrafast Zero-bias Photocurrent in GeS Nanosheets: Promise for Photovoltaics,” K. Kushnir, M. Wang, P.D. Fitzgerald, K.J. Koski, L.V. Titova, ACS Energy Lett. 2, 1429 (2017).
  8. “Ultrafast carrier dynamics in BiVO4 thin film photoanode material: interplay between free carriers, trapped carriers and low-frequency lattice vibrations,” K.T. Butler, B.J. Dringoli, L. Zhou, P.M. Rao, A. Walsh, and L.V. Titova, J. Mater. Chemistry A, 4, 18516 (2016).
  9. “High light absorption and charge separation efficiency at low applied voltage from Sb-doped SnO2/BiVO4 core/shell nanorod-array photoanodes,” L. Zhou, C. Zhao, B. Giri, P. Allen, X. Xu, H. Joshi, Y. Fan, L.V. Titova, P.M. Rao, Nano Letters 16, 3463 (2016).
  10. “Ultrafast carrier recombination, trapping and mobility in silicon thin films grown by molecular beam epitaxy,” L.V. Titova, T.L. Cocker, S. Su, J.-M. Baribeau, X. Wu, D.J. Lockwood, and F.A. Hegmann, Semiconductor Science and Technology, 31, 105017 (2016). 
  11. “Charge transfer state emission dynamics in blue-emitting functionalized silicon nanocrystals,” B. De los Reyes, M.Dasog, M. Na, L.V. Titova, J.G.C. Veinot, and F.A. Hegmann, Phys. Chem. Chem. Phys., 17, 30125 (2015).
  12. (Invited) “Terahertz Spectroscopy: Studying Carrier Dynamics in Semiconductor Nanostructures,” L.V. Titova, S. Xu, J.-M. Baribeau, D.J. Lockwood, and F.A. Hegmann, ECS Trans., 69, 51 (2015).
  13. “Evolution of the Ultrafast Photoluminescence of Colloidal Silicon Nanocrystals with Changing Surface Chemistry,” Z. Yang, G. B. De los Reyes, L.V. Titova, I. Sychugov, M. Dasog, J. Linnros, F.A. Hegmann, and J. G. C. Veinot, ACS Photonics 2, 595 (2015).
  14. “Generation of terahertz radiation from optically excited aligned carbon nanotubes,” V. Titova, C.L. Pint, Q. Zhang, R.H. Hauge, J.Kono, and F.A. Hegmann, Nano Letters 15, 3267 (2015).
  15. “Size vs. Surface: Tuning the Photoluminescence of Freestanding Silicon Nanocrystals across the Visible Spectrum via Surface Groups,” M. Dasog, G. B. De los Reyes, L.V. Titova, F. A. Hegmann, and J. G. C. Veinot, ACS Nano 3, 9636-9648 (2014).
  16. (Invited) “Effect of intense THz pulses on expression of genes associated with skin cancer and inflammatory skin conditions,” L.V. Titova, A. Ayesheshim, D. Purschke, A. Golubov, R. Rodriguez-Juarez, R. Woycicki, F.A. Hegmann, and O. Kovalchuk, Proc. SPIE 8941, 89411G (2013).
  17. Intense THz pulses down-regulate genes association with non-melanoma skin cancer and psoriasis in human skin: a new therapeutic avenue?” L.V. Titova, A. Ayesheshim, A. Golubov, R.Rodriguez-Juarez, R. Woycicki, F. A. Hegmann, and O. Kovalchuk, Sci. Rep. 3, 2363 ( 2013).
  18. “An ultrafast terahertz scanning tunnelling microscope,” T. L. Cocker, V. Jelic, M. Gupta, S. J. Molesky, J. A. J. Burgess, G. De Los Reyes, L. V. Titova, Y. Y. Tsui, M. R. Freeman, and F. A. Hegmann, Nature Photonics 7, 620-625 (2013).
  19. “Intense THz pulses cause H2AX phosphorylation and activate DNA damage response inhuman skin,” L.V. Titova, A. K. Ayesheshim, A. Golubov, D. Fogen, R. Rodriguez-Juarez, F. A. Hegmann, and O. Kovalchuk, Biomed. Opt. Express 4, 559 (2013). (Hi-lighted in news releases from the Optical Society of America and the Institute of Physics). 
  20. “Intense picosecond THz pulses alter gene expression in human skin tissue in vivo,” L.V. Titova, A. K. Ayesheshim, A. Golubov, R. Rodriguez-Juarez, A. Kovalchuk, F. A. Hegmann, and O. Kovalchuk, Proc. SPIE 8585 (2013). 
  21. “Tuning iron pyrite thin film microstructure by sulfurization of columnar iron precursors,” J.M. LaForge, B. Gyenes, S. Xu, L.K. Haynes, L.V. Titova, F.A. Hegmann, M.J. Brett, Sol. En. Mater. Sol. Cells 117, 306-314 (2013).
  22. (Invited) “Ultrafast Carrier Dynamics in Silicon Nanocrystal Films,” L.V. Titova, T.L. Cocker, X. Wang, A. Meldrum, and F.A. Hegmann, ECS Trans. 45, 21-29 (2012).
  23. “Phase diagram of the ultrafast photoinduced insulator-metal transition in vanadium dioxide,” T.L. Cocker, L.V. Titova, S. Fourmaux, G. Holloway, H.-C. Bandulet, D. Brassard, J.-C. Kieffer, M.A. El Khakani, and F.A. Hegmann, Phys. Rev. B 85, 155120 (2012).
  24. “Ultrafast Percolative Transport Dynamics in Silicon Nanocrystal Films,” L.V. Titova, T.L. Cocker, D.G. Cooke, X. Wang, A. Meldrum, and F.A. Hegmann, Phys. Rev. B. 83, 085403 (2011).
  25. “Terahertz conductivity of the metal-insulator transition in a nanogranular VO2 film,” T. L. Cocker, L.V. Titova, S. Fourmaux, H. -C. Bandulet, D. Brassard, J. -C. Kieffer, M. A. El Khakani, and F. A. Hegmann, Appl. Phys. Lett. 97, 221905 (2010).
  26. “Selective excitation of exciton transitions in PTCDA crystals and films,” V.R. Gangilenka, V. Titova, L.M. Smith, H.P. Wagner, L.A.A. DeSilva, L. Gisslen, R. Scholz, Phys. Rev. B 81, 155208 (2010).
  27. “Time-Resolved Terahertz Spectroscopy of Free Carrier Nonlinear Dynamics in Semiconductors,” G. Sharma, L. Razzari, F.H. Su, F. Blanchard, A. Ayesheshim, T.L. Cocker, L.V. Titova, H.C. Bandulet, T. Ozaki, J.-C. Kieffer, R. Morandotti, M. Reid, F.A. Hegmann, IEEE Photonics J. 2, 578 (2010).
  28. (Invited) “Probing ultrafast carrier dynamics and transient conductivity of semiconductors and semiconductor snanostructures using time-resolved terahertz spectroscopy,” L.V. Titova and F.A. Hegmann, Physics in Canada 65, 101 (2009). 
  29. “Terahertz pulse induced intervalley scattering in photoexcited GaAs,” F.H. Su, F. Blanchard, G. Sharma, L. Razzari, A. Ayesheshim, T.L. Cocker, L.V. Titova, T. Ozaki, J.C. Kieffer, R. Morandotti, M. Reid, F.A. Hegmann, Optics Express 17, 9620 (2009).
  30. “Polarized photoluminescence and time-resolved photoluminescence from single CdS nanosheets,” T.B. Hoang, L.V. Titova, A. Mishra, L.M. Smith, H.E. Jackson, K.-Y. Lee, H. Rho, J.M. Yarrison-Rice, Y.-J. Choi, K.J. Choi, and J.-G. Park, Phys. Lett. 92, 143112 (2008).
  31. “Spatially resolved photoluminescence mapping of single CdS nanosheets,” H. Rho, K.-Y. Lee, T.B. Hoang, L.V. Titova, A. Mishra, L.M. Smith, H.E. Jackson, J.M. Yarrison-Rice, Y.-J. Choi, K. J. Choi, and J.-G. Park, Appl. Phys. Lett. 91, 013111 (2008).
  32. “Dynamics of Strongly Degenerate Electron-Hole Plasmas and Excitons in Single InP Nanowires,” L.V. Titova, T.B. Hoang, J.M. Yarrison-Rice, H.E. Jackson, Y. Kim, H.J. Joyce, Q. Gao, H. H. Tan, C. Jagadish, X. Zhang, J. Zou, and L. M. Smith, Nanoletters 7, 3383 (2007).
  33. “Polarization and temperature dependence of Photoluminescence from zincblende and wurtzite InP nanowires”, A. Mishra, L.V. Titova, T.B. Hoang, H.E. Jackson, and L.M. Smith, J.M. Yarrison-Rice, Y. Kim, H.J. Joyce, Q. Gao, H.H. Tan, and C. Jagadish, Appl.Phys. Lett. 91, 263104 (2007).
  34. “Resonant Excitation and Imaging of Nonequilibrium Exciton Spins in Single Core-Shell GaAs-AlGaAs Nanowires,” T.B. Hoang, L.V. Titova, J.M. Yarrison-Rice, H.E. Jackson, A.O. Govorov, Y. Kim, H.J. Joyce, H.H. Tan, C. Jagadish and L.M. Smith, Nanoletters 7, 588 (2007).
  35. Low temperature photoluminescence imaging and time-resolved spectroscopy of single CdS nanowires,” L.V. Titova, T. B. Hoang, H.E. Jackson, and L.M. Smith, J.M. Yarrison-Rice, J.L. Lensch and L.J. Lauhon, Appl. Phys. Lett. 89, 053119 (2006).
  36. “Temperature-Dependence of Photoluminescence from Single Core-Shell GaAs-AlGaAs Nanowires,” L.V. Titova, T. B. Hoang, H.E. Jackson, L.M. Smith, J.M. Yarrison-Rice, Y. Kim, H.J. Joyce, H.H. Tan and C. Jagadish, Appl. Phys. Lett. 89, 173126, (2006).
  37. “Temperature dependent photoluminescence of single CdS nanowires,” T.B. Hoang, L.V. Titova, H.E. Jackson, L.M. Smith, J.M. Yarrison-Rice, J.L. Lensch, L.J. Lauhon, Appl. Phys. Lett. 89, 123123 (2006).
  38. “Resonant Raman scattering from CdS nanowires,” A. Abdi, L.V. Titova, L.M. Smith, H.E. Jackson, J.M. Yarrison-Rice, J.L. Lensch, L.J. Lauhon, Appl. Phys. Lett. 88, 043118 (2006).
  39. “Competition between cubic and uniaxial anisotropy in Ga1-xMnxAs in the low-Mn concentration limit,” L.V. Titova, M. Kutrowski, X. Liu, R. Chakarvorty, W.L. Lim, T. Wojtowicz, J.K. Furdyna, and M. Dobrowolska, Phys. Rev. B 72, 165205 (2005).
  40. “Observation of combined ferromagnetic/paramagnetic phase in Ga1-xMnxAs by magnetic circular dichroism,” K. J. Yee, R. Chakarvorty, W.L. Lim, X. Liu, M. Kutrowski, L.V. Titova, T. Wojtowicz, J.K. Furdyna, and M. Dobrowolska, J. Supercond. 18, 131 (2005). 
  41. “Observation of photoluminescence related to Lomer–Cottrell-like dislocations in ZnSe epilayers grown on in situ cleaved (110) GaAs surfaces,” M. Kutrowski, G. Cywinski, L.V. Titova, E. Martin, X. Liu, T Wojtowicz, J.K Furdyna, M. Dobrowolska, J. Appl. Phys. 97, 13519 (2005). 
  42. “Perpendicular magnetization reversal, magnetic anisotropy, multistep spin switching, and domain nucleation and expansion in Ga1-xMnxAs films,” X. Liu, W. L. Lim, L.V. Titova, M. Dobrowolska, J.K. Furdyna, M. Kutrowski, T. Wojtowicz, Appl. Phys. 98, 063904 (2005).
  43. “ZnCdSe quantum structures by (110)-cleaved-edge overgrowth: MBE growth and μ-PL characterization,” L. V. Titova, G. Cywinski, M. Kutrowski, T. Wojtowicz, X. Liu, J.K. Furdyna, and M. Dobrowolska, phys. stat. sol (b), 241, 519-522 (2004).
  44. “Growth and properties of ferromagnetic In1-xMnxSb alloys,” T. Wojtowicz, W.L. Lim, X. Liu, G.Cywinski, M. Kutrowski, L.V. Titova, K. Yee, M. Dobrowolska, J.K. Furdyna, K.M. Yu, W. Walukiewicz, G.B. Kim, M. Cheon, X. Chen, S.M. Wang, H. Luo, I. Vurgaftmann, J.R. Meyer, Physica E 20, 325 (2004).
  45. “External control of the direction of magnetization in ferromagnetic InMnAs/GaSb heterostructures,” X. Liu, W.L. Lim, L.V. Titova, T. Wojtowicz, M. Kutrowski, K.J. Yee, M. Dobrowolska, J.K. Furdyna, S.J. Potashnik, M.B. Stone, P. Schiffer, I. Vurgaftman, and J.R. Meyer, Physica E 20, 370-373 (2004).
  46. “Magneto-photoluminescence study on magnetic/non-magnetic semiconductor quantum dots,” S. Lee, D.Y. Shin, L.V. Titova, M. Kutrowski, M. Dobrowolska, J.K. Furdyna, stat. sol (b) 241, 722 (2004).
  47. “The effect of Mn on self-assembled CdSe/ZnSe quantum dots,” S. Lee, L.V. Titova, M. Kutrowski, M. Dobrowolska, and J.K. Furdyna, J. Korean Phys. Soc. 42, S531 (2003).
  48. Magneto-optical study of multiple layers of self-assembled quantum dots involving diluted magnetic semiconductors,” S. Lee, D.Y. Shin, L.V. Titova, M. Kutrowski, J.K. Furdyna, and M. Dobrowolska, J. Supercond.16, 453 (2003).
  49. “Structural and magneto-optical studies of multiple quantum dots containing magnetic semiconductors,” S. Lee, D.Y. Shin, H.S. Lee, J.Y. Lee, L.V. Titova, M. Kutrowski, J.K. Furdyna, and M. Dobrowolska, stat. sol. (c), 0, 1283-1287 (2003).
  50. “Magnetic CdSe-based quantum dots grown on Mn-passivated ZnSe,” L.V. Titova, J.K. Furdyna, M. Dobrowolska, S. Lee, T. Topuria, P. Moeck, and N.D. Browning, Appl. Phys. Lett. 80, 1237 (2002).
  51. Fabrication and characterization of III–V semiconductor superlattices with sinusoidal compositional modulation,” X.Liu, Y.Sasaki, L.V. Titova, P.M. Reimer, S.Lee, J.K. Furdyna, Physica E 13, 1143-1146 (2002).