Исследованы быстродействующие фотодетекторы на основе InGaAs/GaAs-наноструктур квантовая яма-точки (КЯТ) с фронтальным и торцевым вводом излучения. Фотодетектор с 40 рядами КЯТ продемонстрировал спектральную чувствительность до 0.4 A/W в диапазоне 900-1100 nm при смещении -5 V. Постоянная времени спада импульсного отклика фотодетектора площадью 1.4·10-4 cm2 составила ~250 ps. Ключевые слова: фотодетектор, быстродействие, спектральная чувствительность, наноструктуры, емкость.
AlGaAs/GaAs microdisk lasers with InAs/InGaAs quantum dots region were transferred onto a silicon wafer using indium bonding. Microlasers have a joint electrical contact put over a residual n+ GaAs substrate, whereas their individual addressing is achieved by placing them p-contact down to separate contact pads. No effect of non-native substrate on electrical resistance, threshold current, thermal resistance, and spectral characteristics was revealed. Microdisks lase in continuous-wave mode without external cooling with the threshold current density of 0.7 kA/cm2. Lasing wavelength remains stable (<0.1 nm/mA) against injection current increment.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.