摘要
Theoptimizationofthefiber-coupledterahertztime-domainspectroscopy(THz-TDS)systemisperformedbychangingthepolarizationoftheopticalexcitationpulsecenteredat1550nm.InGaAs/InAlAsmultilayerstructuresbasedphotoconductiveantennasareusedinTDSsetupasboththeemitterandreceiver.TheexperimentalresultsdemonstratethatnotonlytheTHzsignalpowerbutalsothetemporalwaveformvarywiththerotationoftheexcitingpulsepolarization.Maximumoutputpoweroftheemitterisobtainedwhenthepolarizationofthepumppulseisperpendiculartotheedgeofthemetalelectrodes.AtthismomenttheTHzwaveformisclosetoasingle-cycledpulse.However,doubleTHzpulsescouldberecordedwhenthepumplaserpolarizationisparalleltotheelectrodes.Laserpulsesplittinginducedbythebirefringenceoftheopticalfibermayattributetothepolarizationdependentperformanceofthefiber-coupledTHz-TDSsystem.
出版日期
2015年01月11日（中国期刊网平台首次上网日期，不代表论文的发表时间）
