Shanghai Lub Tsev Kawm Ntawv ntawm Optics Thiab Precision Machinery (SIPM) Ua Kev Tshawb Fawb Txog Kev Tshawb Fawb Txog Lub Zog Muaj Zog Terahertz Lub Teeb Raws Li Organic Crystals

Tsis ntev los no, Lub Xeev Tseem Ceeb Laboratory ntawm Intense-Field Laser Physics (SGLIPM) ntawm Shanghai Lub Tsev Kawm Ntawv ntawm Optics thiab Precision Machinery (SIPM), Suav Academy ntawm Kev Tshawb Fawb (CAS), tau ua tiav hauv kev tshawb fawb ntawm terahertz lub teeb pom kev zoo raws li organic crystals. Cov txiaj ntsig kev tshawb fawb cuam tshuam tau luam tawm hauv Optics Express nyob rau hauv lub npe Tsim thiab tus cwj pwm ntawm cov tawv nqaij terahertz pulses los ntawm DSTMS siv lead ua.
Terahertz nthwv dej yog qhov tseem ceeb hauv kev tshawb fawb txog kev tshawb fawb thiab hauv cov ntaub ntawv thiab lwm yam kev siv vim lawv qhov tshwj xeeb zaus thiab lub sijhawm. Thaum lub terahertz teb lub zog mus txog qhov kev txiav txim ntawm MV / cm, ultrafast modulation ntawm cov khoom muaj peev xwm yuav pom tau hais tias, nrog rau cov modulation ntawm lub hauv paus zog xws li electrons, phonons, spin, thiab lwm yam, raws li zoo raws li inducing theem hloov nyob rau hauv cov ntaub ntawv. Tau ntev, qhov tsis muaj zog-tsav terahertz nthwv dej tiam thev naus laus zis yog qhov tseem ceeb txwv nws txoj kev siv dav. Nrog rau txoj kev loj hlob ntawm laser technology, qhov kho qhov muag kho qhov muag nyhuv nyob rau hauv ultrashort-pulse laser-tsav crystals muab ib tug txhim khu kev qha kev daws teeb meem rau cov tiam ntawm muaj zog-field terahertz tsis.
Raws li lub cim tshiab ntawm kev sib koom ua ke ntawm cov cuab yeej siv rau kev siv lub zog ultrashort pulse laser ntawm Shanghai Institute of Optics thiab Mechanics (SIOME), kev ua haujlwm siv lub zog siab infrared laser los tsav cov kev kho qhov muag kho qhov muag hauv cov organic siv lead ua DSTMS, thiab tau txais kev muaj zog- teb terahertz nthwv dej nrog ib leeg-mem tes zog ntawm 175 μJ thiab lub zog siab tshaj plaws ntawm 17 MV / cm los ntawm kev ua kom zoo rau cov theem sib piv, nrog lub zog hloov pauv ntawm 2 feem pua, thiab cov zaus spectrum ntawm 0.{{ 9}.5 tzs. Cov kws tshawb fawb siv electro-optical sampling, spectral tsom xam thiab lwm yam txhais tau tias systematically txheeb xyuas cov yam ntxwv ntawm terahertz tsis nyob rau hauv lub sij hawm sau, zaus domain, twj tso kua mis zog density dependence. Qhov kev ua haujlwm no txhawb kev tshawb fawb ntawm cov teeb pom kev zoo hauv thaj chaw hauv terahertz band thiab muab lub teeb pom kev zoo rau kev tsav tsheb zoo rau lub zog-tsheb terahertz lub cev hloov kho.
Txoj haujlwm no tau txais kev txhawb nqa los ntawm National Natural Science Foundation ntawm Tuam Tshoj (NSFC), Instrumentation Development Program ntawm Suav Academy ntawm Kev Tshawb Fawb (CAS), Kev Taw Qhia Txog Kev Txawj Ntse ntawm CAS, thiab Kev Pabcuam Kev Txhim Kho rau Cov Tub Ntxhais Hluas hauv Kev Tshawb Fawb ntawm CAS .

Generation thiab characterization ntawm muaj zog-field terahertz nthwv dej. (a) terahertz time-domain waveform; (b) terahertz spectrum; (c) dependence ntawm terahertz zog thiab conversion efficiency ntawm lub twj tso kua mis zog ceev.