Photonic siv lead ua

Lub photonic siv lead ua yog ib yam khoom siv niaj hnub uas muaj kev sib hloov ntawm cov hlwb theem pib nrog qhov siab thiab qis refractive Performance index thiab qhov ntev piv rau lub wavelength ntawm lub teeb los ntawm ib qho spectral ntau. Phonic crystals yog siv hauv optoelectronics. Nws yog assumed tias siv ib tug photonic siv lead ua yuav tso cai, piv txwv li. los tswj kev nthuav tawm ntawm lub teeb nthwv dej thiab yuav tsim lub sijhawm rau kev tsim cov photonic integrated circuits thiab optical systems, nrog rau kev sib txuas lus hauv xov tooj nrog lub bandwidth loj (ntawm qhov kev txiav txim ntawm Pbps).

Cov nyhuv ntawm cov khoom no rau ntawm txoj kev ntawm lub teeb yog zoo ib yam li cov nyhuv ntawm grating ntawm lub zog ntawm electrons nyob rau hauv ib tug semiconductor siv lead ua. Li no lub npe "photonic crystal". Cov qauv ntawm photonic siv lead ua tiv thaiv kev nthuav tawm ntawm lub teeb tsis nyob hauv nws nyob rau hauv ib qho ntawm cov wavelengths. Ces lub thiaj li hu ua photon kis. Lub tswv yim ntawm kev tsim cov pob zeb photonic tau tsim ib txhij hauv xyoo 1987 hauv ob lub chaw tshawb fawb hauv Asmeskas.

Eli Jablonovich ntawm Tswb Kev Sib Txuas Lus Tshawb Fawb hauv New Jersey tau ua haujlwm ntawm cov ntaub ntawv rau photonic transistors. Nws yog ces hais tias nws coined lub sij hawm "photonic bandgap". Nyob rau tib lub sijhawm, Sajiv John ntawm Prieston University, thaum ua haujlwm los txhim kho kev ua haujlwm ntawm lasers siv hauv kev sib txuas lus, nrhiav pom qhov sib txawv. Nyob rau hauv 1991, Eli Yablonovich tau txais thawj photonic siv lead ua. Nyob rau hauv 1997, ib tug loj txoj kev rau tau txais crystals yog tsim.

Ib qho piv txwv ntawm qhov tshwm sim peb-dimensional photonic siv lead ua yog opal, ib qho piv txwv ntawm photonic txheej ntawm tis ntawm npauj npaim ntawm genus Morpho. Txawm li cas los xij, photonic crystals feem ntau yog tsim los ntawm cov chaw sim los ntawm silicon, uas yog qhov ntxeem tau. Raws li lawv cov qauv, lawv muab faib ua ib-, ob- thiab peb-dimensional. Cov qauv yooj yim tshaj plaws yog cov qauv ib-dimensional. Ib-dimensional photonic crystals yog cov paub zoo thiab siv ntev dielectric txheej, uas yog tus cwj pwm los ntawm kev cuam tshuam coefficient uas nyob ntawm lub wavelength ntawm qhov teeb meem teeb. Qhov tseeb, qhov no yog daim iav Bragg, muaj ntau txheej nrog alternating siab thiab qis refractive indices. Lub iav Bragg ua haujlwm zoo li lub lim dej tsis tu ncua, qee qhov zaus tau cuam tshuam thaum lwm tus dhau los. Yog tias koj dov daim iav Bragg rau hauv ib lub raj, koj tau txais cov qauv ntawm ob sab.

Piv txwv ntawm cov khoom tsim tawm ob sab photonic crystals yog photonic optical fibers thiab photonic khaubncaws sab nraud povtseg, uas, tom qab ob peb kev hloov kho, yuav siv tau los hloov cov kev taw qhia ntawm lub teeb teeb liab ntawm qhov deb me dua li cov pa integrated optics systems. Tam sim no muaj ob txoj hauv kev los tsim cov duab photonic.

thawj - PWM (txoj kev dav hlau nthwv dej) yog hais txog ib- thiab ob-seem qauv thiab muaj nyob rau hauv kev suav cov theoretical sib npaug, suav nrog Bloch, Faraday, Maxwell equations. Qhov thib ob Txoj kev tsim qauv fiber ntau optic yog FDTD (Finite Difference Time Domain) txoj kev, uas muaj nyob rau hauv kev daws cov Maxwell sib npaug nrog lub sij hawm dependence rau hluav taws xob teb thiab magnetic teb. Qhov no tso cai rau ib tus ua tiav cov lej sim ntawm kev nthuav tawm ntawm electromagnetic nthwv dej hauv cov qauv siv lead ua. Nyob rau yav tom ntej, qhov no yuav tsum ua kom tau txais cov tshuab photonic nrog qhov ntev piv rau cov khoom siv microelectronic siv los tswj lub teeb.

Qee qhov kev siv ntawm photonic siv lead ua:

• Xaiv tsom iav ntawm laser resonators,
• faib tawm tswv yim lasers,
• Photonic fibers (photonic crystal fiber), filaments thiab planar,
• Photonic semiconductors, ultra-dawb pigments,
• LEDs nrog nce efficiency, Microresonators, Metamaterials - sab laug cov ntaub ntawv,
• Kev ntsuas dav dav ntawm cov khoom siv photonic,
• spectroscopy, interferometry los yog optical coherence tomography (OCT) - siv cov theem muaj zog.