Dark current characteristics of quantum wire infrared photodetectors

The paper focuses on the performance of quantum-wire infrared photodetectors (QRIPs) under dark condition. The effects of the average quantum wire density, the lateral size and the operating temperature on the behaviour of this device are studied. The superiority of QRIPs over the quantum-dot infrared photodetectors (QDIPs), which give lower and stable increasing dark current, is illustrated clearly. A distinct improvement of the responsivity and detectivity of QRIPs compared to QDIPs has been perceived. The theoretical analysis confirms that the stability of QRIPs is affected by the operating temperature.