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2006
Journal Article
Titel
Near infrared absorption and room temperature photovoltaic response in AIN/GaN superlattices grown by metal-organic vapor-phase epitaxy
Alternative
Infrarotnahe Absorption und Raumtemperatur photovoltaisches Ansprechverhalten von MOCVD-gewachsenen AIN/GaN-Übergittern
Abstract
We report on intersubband absorption of near infrared radiation in AlN/GaN superlattice structures grown by metal-organic vapor-phase epitaxy. A good correlation between well thickness and absorption peak energy was obtained. One sample shows a photovoltaic signal which overlaps well with the corresponding absorption curve at around 1.5 µm (830 meV), a common wavelength in optical fiber telecommunication systems. This photovoltaic signal is strongest at temperatures around 75 K and persists up to room temperature. The frequency response of this sample was measured with a modulated 1.5 µm laser diode. The amplitude of the response was highest for a frequency of 36 kHz.
Author(s)