Optical properties of self-assembled quantum wires for application in infra-red detection

IR photodetector based on rectangular quantum wire in magnetic field

“…Infrared photodetectors based on quantum wires and quantum dots have been studied extensively in the last decade [1][2][3][4][5]. The advantages of quantum dots and quantum wire based detectors over quantum well based detectors have also been studied in great detail.…”

“…To change the operating wavelength of the photodetectors based on quantum wires, the diameter/transverse dimension of the wires are changed to obtain the required energy difference between ground and the first excited state [1][2][3][4][5]. Though this method works well, it is not possible for the user of such a photodetector to change the wavelength according to his/her needs.…”

Design and numerical modeling of normal-oriented quantum wire infrared photodetector array

“…There is increasing interest in the development of infrared photodetectors that use intersubband transitions in III-V and II-VI semiconductor heterostructures as the photon detecting mechanism [1][2][3][4][5][6][7]. These quantized intersubband levels are produced in nanoscale structures, such as quantum wells, wires and dots where the conduction band and valence band subbands are ''quantized'', or in other terms, the energy difference between subband levels becomes comparable to the energy of IR radiation (Fig.…”

Detailed carrier recombination in lateral composition modulation structure

“…Owing to its salient features such as band gap tunability, 9) temperature-insensitive optical characteristics, 10) and most notably an enhancement of carrier lifetime 11) due to the spatial separation of photogenerated carriers, the LCM structure is highly promising for forming high-efficiency solar cells, 12) and its use has also been extended to forming devices such as laser diodes (LDs), 13,14) light-emitting diodes (LEDs), 15) and photodetectors (PDs). 16,17) Despite several advantages that the LCM structure can offer, practical devices that incorporate such a structure mostly operate below room temperature and show a poorer performance. Also, an LCMstructure-embedded solar cell has never been realized despite the fact that the LCM structure can help in reducing the recombination of photogenerated carriers thereby increasing the efficiency of the solar cell.…”