E hoʻolauna i ka mea ʻike kiʻi InGaAs

HoʻolaunaMea ʻike kiʻi InGaAs

ʻO InGaAs kekahi o nā mea kūpono no ka hoʻokō ʻana i ka pane kiʻekiʻe amea ʻike kiʻi wikiwikiʻO ka mea mua, he mea semiconductor bandgap pololei ʻo InGaAs, a hiki ke hoʻoponopono ʻia kona laulā bandgap e ka ratio ma waena o In a me Ga, e hiki ai ke ʻike i nā hōʻailona optical o nā nalu like ʻole. I waena o lākou, ua kūlike loa ʻo In0.53Ga0.47As me ka lattice substrate InP a he coefficient absorption kukui kiʻekiʻe loa i ka band kamaʻilio optical. ʻO ia ka mea i hoʻohana nui ʻia i ka hoʻomākaukau ʻana omea ʻike kiʻia loaʻa pū kekahi ka hana ʻoi loa o ke au pōʻeleʻele a me ka hana pane. ʻO ka lua, he kiʻekiʻe loa ka wikiwiki o ka electron drift o nā mea InGaAs a me InP, me ko lākou wikiwiki electron drift saturated ma kahi o 1 × 107 cm / s. I kēia manawa, ma lalo o nā kahua uila kikoʻī, hōʻike nā mea InGaAs a me InP i nā hopena overshoot wikiwiki electron, me ko lākou wikiwiki overshoot e hiki ana i ka 4 × 107 cm / s a ​​me 6 × 107 cm / s. He mea kūpono ia no ka hoʻokō ʻana i kahi bandwidth crossing kiʻekiʻe. I kēia manawa, ʻo nā photodetectors InGaAs ka photodetector kaulana loa no ke kamaʻilio optical. Ma ka mākeke, ʻo ke ʻano hoʻopili ʻana o ka surface-incident ka mea maʻamau. Hiki ke hana nui ʻia nā huahana detector surface-incident me 25 Gaud / s a ​​me 56 Gaud / s. Ua hoʻomohala ʻia hoʻi nā mea detectors surface-incident liʻiliʻi, back-incident, a me high-bandwidth, ʻo ia hoʻi no nā noi e like me ka wikiwiki kiʻekiʻe a me ka saturation kiʻekiʻe. Eia nō naʻe, ma muli o nā palena o kā lākou mau ʻano hoʻopili ʻana, he paʻakikī ke hoʻohui i nā mea ʻike hanana ʻili me nā mea hana optoelectronic ʻē aʻe. No laila, me ka piʻi ʻana o ke koi no ka hoʻohui ʻana optoelectronic, ua lilo mālie nā photodetectors InGaAs i hoʻopili ʻia me ka waveguide me ka hana maikaʻi loa a kūpono no ka hoʻohui ʻana i ke kikowaena o ka noiʻi. I waena o lākou, ʻo nā modula photodetector InGaAs kalepa o 70GHz a me 110GHz kokoke i nā mea āpau e hoʻohana i nā ʻano hoʻopili waveguide. Wahi a ka ʻokoʻa o nā mea substrate, hiki ke hoʻokaʻawale nui ʻia nā photodetectors InGaAs i hoʻopili ʻia me ka waveguide i ʻelua ʻano: INP-based a me Si-based. He kiʻekiʻe ke ʻano o ka mea epitaxial ma nā substrates InP a ʻoi aku ka kūpono no ka hana ʻana i nā mea hana kiʻekiʻe. Eia nō naʻe, no nā mea hui III-V i ulu ʻia a hoʻopaʻa ʻia paha ma nā substrates Si, ma muli o nā ʻano like ʻole ma waena o nā mea InGaAs a me nā substrates Si, ʻaʻole maikaʻi ka maikaʻi o ka mea a i ʻole ka interface, a he nui nō ka lumi no ka hoʻomaikaʻi ʻana i ka hana o nā mea hana.

ʻO ke kūpaʻa o ka photodetector i nā ʻano noi like ʻole, ʻoi aku hoʻi ma lalo o nā kūlana koʻikoʻi, ʻo ia kekahi o nā kumu nui i nā noi hana. I nā makahiki i hala iho nei, ʻo nā ʻano mea ʻike hou e like me ka perovskite, nā mea organik a me nā mea ʻelua-dimensional, ka mea i huki nui i ka nānā ʻana, ke kū nei i nā pilikia he nui e pili ana i ke kūpaʻa lōʻihi ma muli o ka maʻalahi o ka hoʻopilikia ʻia o nā mea ponoʻī e nā mea pili i ke kaiapuni. I kēia manawa, ʻaʻole i oʻo ke kaʻina hana hoʻohui o nā mea hou, a pono mau ka ʻimi hou ʻana no ka hana nui a me ke kūlike o ka hana.

ʻOiai hiki i ka hoʻolauna ʻana o nā inductors ke hoʻonui pono i ka bandwidth o nā hāmeʻa i kēia manawa, ʻaʻole ia i kaulana i nā ʻōnaehana kamaʻilio optical kikohoʻe. No laila, pehea e pale aku ai i nā hopena maikaʻi ʻole e hōʻemi hou aku i nā palena RC parasitic o ka hāmeʻa kekahi o nā kuhikuhi noiʻi o ka photodetector wikiwiki. ʻO ka lua, ʻoiai ke piʻi mau nei ka bandwidth o nā photodetectors i hoʻopili ʻia me ka waveguide, hoʻomaka hou ka palena ma waena o ka bandwidth a me ka responsivity. ʻOiai ua hōʻike ʻia nā photodetectors Ge/Si a me InGaAs photodetector me ka bandwidth 3dB ma mua o 200GHz, ʻaʻole i māʻona kā lākou mau kuleana. Pehea e hoʻonui ai i ka bandwidth me ka mālama ʻana i ka responsivity maikaʻi he kumuhana noiʻi koʻikoʻi, kahi e pono ai ka hoʻolauna ʻana i nā mea hana hou (neʻe kiʻekiʻe a me ka coefficient absorption kiʻekiʻe) a i ʻole nā ​​​​​​hale hana wikiwiki hou e hoʻoponopono ai. Eia kekahi, i ka piʻi ʻana o ka bandwidth o ka hāmeʻa, e piʻi mālie nā hiʻohiʻona noi o nā mea ʻike i nā loulou photonic microwave. ʻAʻole e like me ka hanana mana optical liʻiliʻi a me ka ʻike ʻike kiʻekiʻe i ke kamaʻilio optical, ʻo kēia hiʻohiʻona, ma ke kumu o ka bandwidth kiʻekiʻe, he koi mana saturation kiʻekiʻe no ka hanana mana kiʻekiʻe. Eia nō naʻe, hoʻohana pinepine nā mea hana bandwidth kiʻekiʻe i nā ʻano liʻiliʻi, no laila ʻaʻole maʻalahi ka hana ʻana i nā photodetectors wikiwiki a me ka mana saturation kiʻekiʻe, a pono paha nā hana hou aʻe i ka unuhi ʻana o ka mea lawe a me ka hoʻolaha wela o nā mea hana. ʻO ka mea hope loa, ʻo ka hoʻemi ʻana i ke au pouli o nā mea ʻike wikiwiki he pilikia ia e pono ai nā photodetectors me ka lattice mismatch e hoʻoponopono. Pili nui ke au pouli i ka maikaʻi o ke kristal a me ke kūlana o ka ʻili o ka mea. No laila, ʻo nā kaʻina hana koʻikoʻi e like me ka heteroepitaxy kiʻekiʻe a i ʻole ka hoʻopaʻa ʻana ma lalo o nā ʻōnaehana lattice mismatch e pono ai ka noiʻi hou aku a me ka hoʻopukapuka kālā.