Modulator y'amashanyarazi ya terahertz y'ubwenge ikora neza yakozwe neza

Umwaka ushize, itsinda rya Sheng Zhigao, umushakashatsi wo mu kigo cy’ubushakashatsi ku ngufu za rukuruzi cya Hefei Institute of Physical Sciences, Ishuri Rikuru ry’Ubumenyi bw’Abashinwa, ryakoze modulator y’amashanyarazi ya terahertz ikora kandi ifite ubwenge ikoresheje igikoresho cy’igerageza cy’imbaraga za rukuruzi zihamye. Ubushakashatsi bwasohotse muri ACS Applied Materials & Interfaces.

Nubwo ikoranabuhanga rya terahertz rifite imiterere myiza ya spectral ndetse n'ubushobozi bwagutse bwo kurikoresha, ikoreshwa ryaryo mu buhanga riracyari mu nkengero zikomeye bitewe n'iterambere ry'ibikoresho bya terahertz n'ibice bya terahertz. Muri byo, kugenzura umuraba wa terahertz mu buryo bufatika kandi bw'ubwenge hakoreshejwe ikoranabuhanga ryo hanze ni icyerekezo cy'ingenzi cy'ubushakashatsi muri uru rwego.

Itsinda ry’ubushakashatsi ryavumbuye uburyo bwo gukora ubushakashatsi bugezweho bw’ibice by’ingenzi bya terahertz, rigamije gusesengura imiterere y’ingufu za terahertz bushingiye kuri graphene y’ibikoresho bifite imiterere ibiri [Adv. Optical Mater. 6, 1700877 (2018)], modulator ya Terahertz ikoresha ikoranabuhanga rigezweho ishingiye kuri okiside ifitanye isano cyane [ACS Appl. Mater. Inter. 12, Nyuma ya 48811 (2020)] hamwe n’isoko rishya rya terahertz rikoresha amashanyarazi rimwe rikoresha amashanyarazi [Advanced Science 9, 2103229 (2021)], filime ya electron oxide vanadium dioxide ijyanye nayo itoranywa nk’urwego rukora, imiterere y’imiterere myinshi n’uburyo bwo kugenzura ikoranabuhanga. Uburyo bwinshi bwo kohereza, gusubiza no kwinjiza terahertz bugerwaho (Ishusho a). Ibisubizo bigaragaza ko uretse kohereza no kwinjiza, urwego rwo kugarura no kugarura urumuri rushobora kandi kugenzurwa n’amashanyarazi, aho ubujyakuzimu bw’ihindagurika ry’urumuri bushobora kugera kuri 99.9% naho urwego rwo kugarura rushobora kugera kuri ~180o modulation (Ishusho ya b). Igishimishije kurushaho, kugira ngo bagere ku buyobozi bw’amashanyarazi bwa terahertz, abashakashatsi bakoze igikoresho gifite uburyo bushya bwo gusubiza "terahertz - electric-terahertz" (Ishusho ya c). Nubwo hari impinduka mu miterere y’aho ibintu bitangiriye ndetse n’ibidukikije byo hanze, igikoresho cy’ubwenge gishobora kugera ku gaciro k’ihindagurika ry’urumuri (biteganijwe) mu masegonda agera kuri 30.

(a) Imbonerahamwe y'icyitegererezo cy'ishushomodulator y'amashanyarazihashingiwe kuri VO2

(b) impinduka mu bijyanye no kohereza, gusubiza ibintu mu buryo, kubyinjiramo no kubyibuha hamwe n'umuyoboro w'amashanyarazi wagaragaye

(c) igishushanyo mbonera cy'ubuyobozi bw'ubwenge

Iterambere rya terahertz ikora kandi ifite ubwengemodulator y'amashanyarazi n'amataraishingiye ku bikoresho by'ikoranabuhanga bifitanye isano bitanga igitekerezo gishya cyo gushyira mu bikorwa uburyo bwo kugenzura ikoranabuhanga rya terahertz. Iki gikorwa cyashyigikiwe na Gahunda y'Igihugu y'Ubushakashatsi n'Iterambere ry'Ingenzi, Ikigo cy'Igihugu cy'Ubumenyi bw'Inyamaswa n'Ikigega cy'Ubuyobozi bwa Laboratwari ya Magnetic Field yo mu Ntara ya Anhui.