Daim ntawv thov ntawm ze-field optical microscopy
Txij li thaum nyob ze-field optical microscopy tuaj yeem kov yeej qhov tsis txaus ntawm cov tshuaj kho qhov muag tsom iav xws li kev daws teeb meem tsawg thiab kev puas tsuaj rau cov qauv tshuaj lom neeg los ntawm kev tshuaj ntsuam electron microscopy thiab scanning tunneling microscopy, nws tau siv ntau thiab ntau dua, tshwj xeeb tshaj yog nyob rau hauv biomedicine li. zoo li nanomaterials thiab microelectronics.
Scanning ze-field optical microscopy (SNIM) yog ib ceg ntawm SNOM, uas yog kev siv SNOM thev naus laus zis hauv thaj chaw infrared. Txhawm rau kom tau txais cov ntaub ntawv daws teeb meem siab, microprobes rau hauv cheeb tsam, kev tshuaj ntsuam xyuas, thiab kev soj ntsuam ze ze yog qhov tseem ceeb ntawm SNIM. Muaj ntau hom microprobes, uas tau muab faib ua ob pawg: me me-qhov probes thiab tsis-qhov probes, thiab me-qhov probes feem ntau yog fiber-optic probes. Thaum qhov kev ncua deb ntawm fiber ntau optic sojntsuam mus rau cov qauv nyob rau hauv kev ntsuam xyuas yog qhov tseeb, qhov luaj li cas ntawm lub qhov ntawm lub fiber optic sojntsuam thiab cov duab ntawm lub khob hliav qab lub kaum sab xis txiav txim qhov kev daws teeb meem, rhiab heev thiab kis tau tus mob efficiency ntawm SNIM. Txawm li cas los xij, nws yog ib qho nyuaj rau ua infrared fiber ntau rau SNIM thiab microprobe. Piv nrog rau kev npaj ntawm fiber ntau optic sojntsuam nyob rau hauv qhov pom wavelength band, ntawm ib sab, muaj ob peb hom optical fibers haum rau nruab nrab-infrared wavelength band (2.5-25 hli); Ntawm qhov tod tes, qhov uas twb muaj lawm infrared optical fibers yog nkig, nrog tsis zoo ductility thiab saj zawg zog, thiab nrog cov khoom tsis zoo. Yuav kom txo tau lub teeb attenuation, nws yog ib qho nyuaj rau ua ib tug high-zoo infrared fiber sojntsuam.
Qee qhov kev tshawb fawb txawv teb chaws SNIM cov tsev kawm ntawv hauv kev sojntsuam siv rau lwm txoj hauv kev ntawm lub teeb sojntsuam, xws li Nyiv Kawata thiab lwm yam kev txhim kho ntawm cov kheej kheej prism sojntsuam, Lub teb chaws Yelemees Fischer thiab lwm yam tetrahedral sojntsuam, thiab zui tsis ntev los no KNOLL thiab lwm yam kev siv semiconductors (xws li silicon) polymers. ua los ntawm non-porous scattering probes thiab lwm yam. Cov tshuaj microprobe saum toj no zoo li tsis zoo rau peb, vim tias cov txheej txheem ntau lawm yuav tsum tau ua, xav tau cov cuab yeej tshwj xeeb, thiab vim tias peb tus qauv SNIM xaiv hom kev xav, zui thaum kawg tau txais cov tshuaj fiber ntau optic sojntsuam.
Nyob rau hauv txoj kev loj hlob ntawm microprobe, muaj ob yam uas yuav tsum tau xav txog: ntawm ib sab, nws yog ib qho tsim nyog yuav tsum ua kom lub qhov muag pom los ntawm lub qhov me me raws li qhov ua tau, ntawm qhov tod tes, ua kom lub teeb ntws los ntawm lub qhov me me. loj npaum li qhov ua tau, txhawm rau kom tau txais lub teeb liab siab-rau-suab nrov piv. Rau fiber ntau optic probes, qhov me me ntawm txoj kab uas hla ntawm rab koob, qhov kev daws teeb meem siab dua, tab sis cov luminous flux yuav me dua. Nyob rau tib lub sijhawm, qhov kev sojntsuam cov lus qhia ntawm qhov luv dua qhov zoo dua, vim tias qhov ntev ntawm lub taub, lub teeb propagation los ntawm waveguide me dua nws lub wavelength kuj yog qhov deb, kom lub teeb attenuation yog ntau dua. Yog li ntawd, fiber ntau optic sojntsuam ntau lawm nyob rau hauv kev nrhiav lub hom phiaj yog kom tau txais ib rab koob me me thiab lub hau ntawm lub hau luv.
