Ua hoʻomohala maikaʻi ʻia ka modulator electro-optic ikaika terahertz

I ka makahiki i hala, ua hoʻomohala ka hui o Sheng Zhigao, kahi mea noiʻi ma ka High Magnetic Field Center o ka Hefei Institute of Physical Science, Chinese Academy of Science, i hoʻomohala i kahi modulator electro-optic ikaika a naʻauao e hilinaʻi ana i ka hoʻokolohua hoʻokolohua kiʻekiʻe. mea hana. Ua paʻi ʻia ka noiʻi ma ACS Applied Materials & Interfaces.

ʻOiai ua loaʻa i ka ʻenehana terahertz nā hiʻohiʻona spectral kiʻekiʻe a me nā hiʻohiʻona noi ākea, ua kaupalena ʻia kāna noi ʻenekinia e ka hoʻomohala ʻana i nā mea terahertz a me nā ʻāpana terahertz. Ma waena o lākou, ʻo ka mana ikaika a naʻauao o ka hawewe terahertz ma waho o ke kahua he alakaʻi noiʻi koʻikoʻi ma kēia kahua.

Ke manaʻo nei i ke kuhikuhi noiʻi ʻokiʻoki o nā ʻāpana koʻikoʻi terahertz, ua hana ka hui noiʻi i kahi modulator stress terahertz e pili ana i ka graphene waiwai ʻelua [Adv. Mater Optical. 6, 1700877(2018)], he Terahertz broadband photocontrolled modulator e pili ana i ka oxide pili ikaika [ACS Appl. Mater. Inter. 12, Ma hope o 48811(2020)] a me ka phonon-based hou hoʻokahi-frequency magnetic-controlled source terahertz [Advanced Science 9, 2103229(2021)], ua koho ʻia ke kiʻiʻoniʻoni electron oxide vanadium dioxide e like me ka papa hana, ka ʻōnaehana multi-layer. Hoʻohana ʻia ke ʻano hoʻolālā a me ka mana uila. Hoʻokō ʻia ka hoʻololi ʻana o ka terahertz, ka noʻonoʻo a me ka absorption (Figure a). Hōʻike nā hopena i ka hoʻohui i ka transmittance a me ka absorptivity, hiki ke hoʻoponopono ikaika ʻia ka reflectivity a me ka noʻonoʻo ʻana e ke kahua uila, kahi e hiki ai i ka hohonu o ka modulation reflectivity ke hiki i 99.9% a hiki i ka manawa noʻonoʻo ke hiki i ~180o modulation (Figure b) . ʻOi aku ka hoihoi, no ka hoʻokō ʻana i ka mana uila terahertz naʻauao, ua hoʻolālā nā mea noiʻi i kahi hāmeʻa me kahi puke manaʻo "terahertz - electric-terahertz" (Figure c). Ma waho o ka hoʻololi ʻana i nā kūlana hoʻomaka a me ke kaiapuni o waho, hiki i ka mea akamai ke hōʻea i ka waiwai modulation terahertz i hoʻonohonoho ʻia (manaʻo ʻia) ma kahi o 30 kekona.

(a) kiʻi hoʻolālā o kahielectro optic modulatorma muli o VO2

(b) nā hoʻololi o ka transmittance, reflectivity, absorptivity a me ka noʻonoʻo ʻana me ka manaʻo o kēia manawa

(c) kiʻikuhi schematic o ka mana naʻauao

ʻO ka hoʻomohala ʻana i kahi terahertz ikaika a naʻauaoelectro-optic modulatorma muli o nā mea uila pili e hāʻawi i kahi manaʻo hou no ka hoʻokō ʻana i ka mana naʻauao terahertz. Ua kākoʻo ʻia kēia hana e ka National Key Research and Development Program, ka National Natural Science Foundation a me ka High Magnetic Field Laboratory Direction Fund o Anhui Province.