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Журнал радиоэлектроники Электронный научный журнал · eISSN 1684-1719
2016, № 12 · ТВЕРДОТЕЛЬНАЯ ЭЛЕКТРОНИКА

Туннельная проводимость короткопериодных сверхрешеток с ТГц резонатором

С.К. Папроцкий1, И.В. Алтухов1, М.С. Каган1, С.Е. Дижур1, Н.А. Хвальковский1, Н.Д. Ильинская2, А.А. Усикова2, Ю.М. Задиранов2, А.Д. Буравлёв2, А.П. Васильев2, В.М. Устинов2, А.Н. Баранов3, Р. Тесье3

1 ИРЭ им. В.А. Котельникова РАН, Москва, Россия
2 Физико-технический институт им. Иоффе РАН, Россия
3 IES, Universite Montpellier 2, CNRS, Montpellier, France, Франция
Полный текст (PDF) УДК 538.9 EDN VUYSVA

Аннотация

Исследован вертикальный транспорт в короткопериодных сверхрешетках InAs/AlSb и GaAs/AlAs при комнатной температуре. Обнаружено влияние ТГц резонатора на вольтамперные характеристики в режиме как резонансного, так и нерезонансного туннелирования. Предложены возможные объяснения.

  • ТГц резонатор
  • сверхрешётки
  • THz cavity
  • superlattices
  • ТГц генерация
  • эффект Пёрселла
Abstract (in English)

The effect of THz optical cavity on the resonant and non-resonant tunneling in short-period superlattices (SLs) was observed. The MBE grown InAs/AlSb and GaAs/AlAs SLs consisted, respectively, of 60 and 100 periods sandwiched between heavily doped cap layer and the substrate. The metallic contacts to the structure had the form of a ring and formed a distributed cavity for a free-space wavelength of 110 to 160 μm. The measurements were performed mainly at room T. The periodic maxima observed in current-voltage characteristics of resonator SL structures at the non-resonant tunneling were explained by the Purcell effect - the enhancement of spontaneous emission rate for optical transitions between confined levels within QWs at resonant frequencies of the cavity. The effect of the optical cavity is observed also in the region of miniband transport at moving domain formation. A change of the cavity quality led to a change in the shape of I-V curve. The reason for this change can be the high enough alternating field generated in the cavity, which shifts the operating point due to the rectification of ac field because of strong nonlinearity of the SL. This result points at the excitation of THz cavity by the negative resistance of SL with electric domains.

Для цитирования

Папроцкий С.К., Алтухов И.В., Каган М.С., Дижур С.Е., Хвальковский Н.А., Ильинская Н.Д., Усикова А.А., Задиранов Ю.М., Буравлёв А.Д., Васильев А.П., Устинов В.М., Баранов А.Н., Тесье Р. Туннельная проводимость короткопериодных сверхрешеток с ТГц резонатором // Журнал радиоэлектроники. – 2016. – № 12.

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