THz Generation
Zithunzi za ZnTe
M'mawonedwe amakono a THz time-domain spectroscopy (THz-TDS), njira yodziwika bwino ndi THz pulses generation by optical rectification (OR) ya ultrashort laser pulses ndiyeno kudziwika ndi free space electro-optic sampling (FEOS) mu makhiristo osagwirizana ndi apadera. .
Pokonzanso kuwala, bandwidth ya chochitika champhamvu cha laser pulse imasinthidwa kukhala bandwidth ya THz emission, pomwe mawonekedwe onse a kuwala ndi THz amafalikira kudzera mu kristalo wopanda mzere.
Mu FEOS, zonse THz ndi zofooka za laser pulses zimafalikira kudzera mu kristalo wopanda mzere, zomwe zimapangitsa kuti theTHz ichedwetse gawo la kugunda kwamphamvu kwa laser.Kuchedwetsa kwa gawoli kumayenderana ndi mphamvu yakumunda yamagetsi ya chizindikiro cha THz chomwe chapezeka.
Makristasi a Optical adalumikizana ndi ZnTe
10x10x(1+0.01)mm
Makhiristo osagwirizana ngati ZnTe, okhala ndi <110> mawonekedwe a kristalo amatha kugwiritsidwa ntchito mu OR ndi FEOS pazochitika zabwinobwino.Komabe, makhiristo a <100> otsogolera alibe zinthu zopanda malire zomwe zimafunikira kwa OR ndi FEOS, ngakhale kuti mzere wawo wa THz ndi mawonekedwe owoneka bwino ndi ofanana ndi <110>-oriented crystals.Zofunika kuti pakhale mbadwo wopambana wa THz kapena kuzindikira. mu mawonekedwe amtundu wa THz-TDS osagwirizana ndi kristalo ndi gawo lofananira pakati pa kutulutsa (kuzindikira) kugunda kwamaso ndikupangidwa (kwazindikirika) chizindikiro cha THz.Komabe, makhiristo opanda mzere oyenera THz spectroscopy applications ali ndi kuwala kwamphamvu kwa phonon resonances mu THz range, kubalalitsidwa kwamphamvu kwa THz refractive index kumachepetsa ma frequency ofananira ndi gawo.
Makhiristo okhuthala omwe sali owoneka bwino amapereka gawo la THz-mawonekedwe ofananira kuzungulira gulu lopapatiza pafupipafupi. Amangothandizira kagawo kakang'ono ka bandwidth ya laser pulse yotulutsa (yozindikira), popeza ma siginecha owoneka bwino ndi THz amakumana ndi kuyenda kwakukulu pamatali ataliatali ofalitsa.Koma mphamvu zachizindikiro zomwe zimapangidwa (zodziwika) nthawi zambiri zimakhala zokwera pamtunda wautali wofalitsa.
Makhiristo owonda kwambiri osakhala ndi mzere amapereka mawonekedwe abwino a THz-optical gawo mkati mwa bandwidth yonse ya kutulutsa (kuzindikira) laser pulse, koma mphamvu ya siginecha (yodziwika) nthawi zambiri imakhala yaying'ono, chifukwa mphamvu ya siginecha imakhala yolingana ndi mtunda wa THz-optical co-propagation. .
Pofuna kupereka gawo lalikulu lofananira mum'badwo wa THz ndi kuzindikira ndikusunga kusinthasintha kwafupipafupi nthawi imodzi, DIEN TECH idapanga bwino kuphatikiza ZnTe crystal- makulidwe a 10µm (110) ZnTe pa (100)ZnTe kuchotsera.M'makhiristo oterowo, kufalitsa kwa THz-optical ndikofunikira mkati mwa <110> gawo la kristalo, ndipo zowunikira zingapo ziyenera kupitilira makulidwe onse a kristalo.
