Nano emitting diode

Researchers in the Netherlands have for the first time successfully created quantum dot nanowire (quantum dot nanowire). The results were carried out by the team of the Kavli Nano Science Institute in Delft and the Phillips Research Laboratory in Eiindhoven, which opened a way to make nano-electronic components based on single nanowires. Here, the transport of a single photon can be combined with single photon optics - a welcome result in optoelectronic devices. The results have just been published in Nano Letters .

The nanowire-based components have proved to be superior to conventional plate LEDs. Due to the large surface area, they are also the "dominant" candidates for sensor and detection applications in areas where the optical properties of nanowires can be dramatically changed when the environment. Moreover, high-quality nanowires can be developed on low-cost and popular soles like Si, which means that it is easy to use for making commercial optical components.

TEM nanowire and pn contact.

The fabrication structure of the Delft-Philips group is based on the heterogeneous structure of the nanowires made of A ₃ B ₅ semiconductor materials, In-P and In-As. Researchers have grown nanowires using vapor-liquid-solid phase deposition (VLS - Vapor - Liquid - Solid), enabling the creation of high-quality crystal structures and adjustable diameters. control. Next, they placed a nanowire (separated from the upper wire system) with a diameter of 30 nm and a length of 4 μm on the top of the Si substrate, doped with hydrosulphide (HS) and zinc diethyl (Zn (COO) ₂ ) along wire shaft and making pn contacts on the wire. The team obtained the components with the pn contact layer as an extremely small LED in which the electron recombination of the hole was limited due to the quantum size of the wire section. The luminescent component on the infrared strip when applied to it is a voltage.

Atomic microscope image of LED.

"Quantum dot size can lead to a single-photon source with controllable electric performance, very useful for quantum cryptography and quantum information applications" - Maarten van Kouwen a member of "We hope to be able to produce single photons efficiently as required, as well as to coordinate photon pairs for those applications," the team said.

The Dutch team believes that it should also be aimed at converting single electrons to single photons using components like this. If possible, it would allow single electron spins to be transformed into photon polarization, and thus allow faster and more practical electronic single spin measurements."The control of electron spins and single photons will allow a multitude of experiments in the field of quantum information and can even supply blocks for components like quantum repeater" - Valery Zwiller, a member of the group explained. The group published the results in Nano Letters (The American Chemical Soceiety).

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