## REFERENCES

Abo-Bakr, M., Feikes, J., Holldack, K., Kuske, P., Peatman, W.B., Schade, U., Wustefeld, G. & Hübers, H.W. (2003). Brilliant, coherent far-infrared (THz) synchrotron radiation. Phys. Rev. Lett. 90, 094801.

Bhasin, L. & Tripathi, V.K. (2011). Terahertz generation from laser filaments in the presence of a static electric field in a plasma. Phys. Plasma 18, 123106.

Chen, F.F. (1983). Introduction to Plasma Physics and Controlled Fusion. New York: Plenum Press.

Carr, G.L., Martin, M.C., Mckinney, W.R., Jordan, K., Neil, G.R. & Williams, G.P. (2002). High-power terahertz radiation from relativistic electrons. Nat. (London) 420, 153.

D'amico, C., Houard, A., Franco, M., Prade, B., Mysyrowicz, A., Couairon, V. & Tikhonchuk, V.T. (2007). Conical forward THz emission from femtosecond-laser-beam filamentation in air. Phys. Rev. Lett. 98, 235002.

Dragoman, D. & Dragoman, M. (2004). Time-Frequency signal processing of terahertz pulses. App. Opt. 43, 3848.

Dua, H.W., Chena, M., Shenga, Z.M. & Zhanga, J. (2011). Numerical studies on terahertz radiation generated from two color laser pulse interaction with gas targets. Laser Part. Beams 29, 447.

Esarey, E., Sprangle, P., Krall, J. & Ting, A. (1996). Overview of plasma based accelerator concepts. IEEE Trans. Plasma Sci. 24, 252.

Garg, V. & Tripathi, V.K. (2010). Resonant third harmonic generation of an infrared laser in a semiconductor wave guide. Laser Part. Beams 28, 327.

Ghorbanalilu, M. (2012). Second and third harmonics generations in the interaction of strongly magnetized dense plasma with an intense laser beam. Laser Part. Beams 30, 291.

Giulietti, D., Banfi, G.P., Deha, I., Giulietti, A., Lucchesi, M., Nocera, L. & Zun, C.Z. (1988). Second harmonic generation in underdense plasma. Laser Part. Beams 6, 141.

Hamster, H., Sullivan, A., Gordon, S., White, W. & Falcone, R.W. (1993). Subpicosecond, electromagnetic pulses from intense laser-plasma interaction. Phys. Rev. Lett. 71, 2725.

Hamster, H., Sullivan, A., Gordon, S. & Falcone, R.W. (1994). Short-pulse terahertz radiation from high-intensity-laser-produced plasmas. Phys. Rev. E 49, 671.

Hu, G.Y., Shen, B., Lei, A., Li, R. & Xu, Z. (2010). Transition Cherenkov radiation of terahertz generated by superluminous ionization front in femtosecond laser filament. Laser Part. Beams 28, 399.

Kim, K.Y., Taylor, A.J., Glownia, T.H. & Rodriguez, G. (2008). Coherent control of terahertz super continuum generation in ultrafast laser–gas interactions. Nat. Photon. 2, 605.

Kumar, K.K.M. & Tripathi, V.K. (2013). Third harmonic generation of a nonlinear laser Eigen mode of a self sustained plasma channel. Laser Part. Beams 31, 163.

Leemans, W.P., Geddes, C.G.R., Faure, J., Tóth, C.S.Tilborg, J.V., Schroeder, C.B., Esarey, E., Fubiani, G., Auerbach, D., Marcelis, B., Carnahan, M.A., Kaindl, R.A., Byrd, J. & Martin, M.C. (2003). Observation of Terahertz emission from a laser-plasma accelerated electron bunch crossing a plasma-vacuum boundary. Phys. Rev. Lett. 91, 074802.

Liu, C.S. & Tripathi, V.K. (2009). Tunable terahertz radiation from a tunnel ionized magnetized plasma cylinder. J. Appl. Phy. 105, 013313.

Malik, A.K., Malik, H.K. & Stroth, U. (2012). Terahertz radiation generation by beating of two spatial-Gaussian lasers in the presence of a static magnetic field. Phy. Rev. E 85, 016401.

Malik, A.K. & Malik, H.K. (2012). Strong and collimated THz radiation by super Gaussian lasers. Europ. Phys. Lett. 100, 45001.

Malik, A.K., Malik, H.K. & Nishida, Y. (2011). Terahertz radiation generation by beating of two spatial-Gaussian lasers. Phys. Lett. A 375, 1191.

Nafil, R.Q., Singh, M., Al-Janabi, A.H. & Sharma, R.P. (2013). THz generation by the beating of two high intense laser beams. J. Plasma Phys. 79, 657.

Panwar, A., Ryu, C.M. & Kumar, A. (2013). Effect of plasma channel non-uniformity on resonant third harmonic generation. Laser Part. Beams 31, 531.

Penano, J., Sprangle, P., Hafizi, B., Gordo, D. & Serafim, P. (2010). Terahertz generation in plasmas using two-color laser pulses. Phys. Rev. E 81, 026407.

Schillinger, H. & Sauerbrey, R. (1999). Electrical conductivity of long plasma channels in air generated by self-guided femtosecond laser pulses. Appl. Phys. B 68, 753.

Schroeder, C.B., Esarey, E., Tilborg, J.V. & Leemans, W.P. (2004). Theory of coherent transition radiation generated at a plasma-vacuum interface. Phys. Rev. E 69, 016501.

Sharma, R.P., Monika, M., Sharma, P., Chauhan, P. & Jia, A. (2010). Interaction of high power laser beam with magnetized plasma and THz generation. Laser Part. Beams 28, 531.

Sheng, Z.M., Wu, H.C., Li, K. & Zhang, J. (2004). Terahertz radiation from the vacuum-plasma interface driven by ultrashort intense laser pulses. Phys. Rev. E 69, 025401.

Sheng, Z.M., Mima, K. & Zhang, J. (2005). Powerful terahertz emission from laser wake fields excited in inhomogeneous plasmas. Phys. Plasmas 12, 123103.

Siegel, P.H. (2002). Terahertz technology. IEEE Trans. Microwave Theo. Tech. 50, 910.

Sizov, F. (2010). THz radiation sensors. Opt. Electron. Rev. 18, 10.

Sprangle, P., Penano, J. R., Hafizi, B. & Kapetanakos, C.A. (2004). Ultrashort laser pulses and electromagnetic pulse generation in air and on dielectric surfaces. Phys. Rev. E 69, 066415.

Tani, M., Gu, P., Hyodo, M., Sakai, K. & Hidaka, T. (2000). Generation of coherent terahertz radiation by photo mixing of dual-mode lasers. Opt. Quan. Electron. 32, 503–520.

Tripathi, V.K. & Liu, C.S. (1990). Plasma effects in a free electron laser. IEEE Trans. Plasma Sci. 18, 466.

Verma, U. & Sharma, A.K. (2009). Laser second harmonic generation in a rippled density plasma in the presence of azimuthal magnetic field. Laser Part. Beams 27, 719.

Verma, U. & Sharma, A.K. (2011). Nonlinear electromagnetic Eigen modes of a self created magnetized plasma channel and its stimulated Raman scattering. Laser Part. Beams 29, 471.

Varshney, P., Sajal, V., Singh, K.P., Kumar, R. & Sharma, N.K. (2013). Strong terahertz radiation generation by beating of extra-ordinary mode lasers in a rippled density magnetized plasma. Laser Part. Beams 31, 337.

Varshney, P., Sajal, V., Chauhan, P., Kumar, R. & Sharma, N.K. (2014). Effects of transverse static electric field on terahertz radiation generation by beating of two transversely modulated Gaussian laser beams in a plasma. Laser Part. Beams 32, 375.

Wu, H.C., Sheng, Z.M. & Zhang, J. (2008). Single-cycle powerful megawatt to gigawatt terahertz pulse radiated from a wavelength-scale plasma oscillator. Phys. Rev. E 77, 046405.

Xie, X., Dai, J.M. & Zhang, X.C. (2006). Coherent control of THz wave generation in ambient air. Phys. Rev. Lett. 96, 075005.