Observation of temporal behavior of the emission frequency from an ultrashort, high-power, and compact millimeter-wave source

The authors demonstrated observation of emission frequency chirping of millimeter-wave emission from a time-varying plasma produced by a nanosecond UV laser pulse. By using a heterodyne interferometer the time-resolved frequency of the emission from a dc to ac radiation converter source was observed to range from 20 to 32 GHz due to the rapid plasma creation. This chirped pulse is suitable for application in various novel dense plasma diagnostics.

[1]  Dawson,et al.  Frequency up-conversion of electromagnetic radiation with use of an overdense plasma. , 1988, Physical review letters.

[2]  Yugami,et al.  Experimental observation of further frequency upshift from dc to ac radiation converter with perpendicular dc magnetic field , 2000, Physical review letters.

[3]  Y. Nishida,et al.  Imaging system for low-density plasma by heterodyne interferometer with fan beam microwave , 2002 .

[4]  Dawson,et al.  Conversion of dc Fields in a Capacitor Array to Radiation by a Relativistic Ionization Front. , 1995, Physical review letters.

[5]  M. Tani,et al.  Terahertz absorption spectra of L-, D-, and DL-alanine and their application to determination of enantiometric composition , 2005 .

[6]  Yasushi Nishida,et al.  Experimental observation of short-pulse upshifted frequency microwaves from a laser-created overdense plasma. , 2002, Physical review. E, Statistical, nonlinear, and soft matter physics.

[7]  Konstantinos Papadopoulos,et al.  Generation of tunable far-infrared radiation by the interaction of a superluminous ionizing front with an electrically biased photoconductor , 1999 .

[8]  Thomas C. Katsouleas,et al.  Generation of ultrashort, discrete spectrum microwave pulses using the dc to ac radiation converter , 1998 .

[9]  Y Nishida,et al.  Experimental observation of radiation from cherenkov wakes in a magnetized plasma. , 2002, Physical review letters.

[10]  Szymon Suckewer,et al.  Picosecond pulse frequency upshifting by rapid free-carrier creation in ZnSe , 2002 .

[11]  D. Auston.  Picosecond optoelectronic switching and gating in silicon , 1975 .