H. Wald et al., Comparison of the electromagnetic pulse emission from YBa2Cu3O7-delta and Y0.7Pr0.3Ba2Cu3O7 excited by femtosecond laser pulses, PHYSICA C, 341, 2000, pp. 1899-1900
We observe terahertz radiation from Y0.7Pr0.3Ba2Cu3O7 (YPBCO) thin films ex
cited with femtosecond optical pulses, and compare its waveform and efficie
ncy with those from YBa2Cu3O7-delta (YBCO). It is found that YPBCO can prod
uce much stronger radiation than YBCO. We discuss the origin of the enhance
ment as well as the temperature dependence of the emission properties.