On the relation between electrical and electro-optical properties of tunnelling injection quantum dot lasers.

We present a comprehensive study of the temperature dependent electronic and optoelectronic properties of a tunnelling injection quantum dot laser. The optical power-voltage ( -) characteristics are shown to be correlated with the current-voltage (-) and capacitance-voltage (-) dependencies at low and elevated temperatures. Cryogenic temperature measurements reveal a clear signature of resonant tunnelling manifested in periodic responses of the - and - characteristics, which diminish above 60 K.

Steering coherence in quantum dots by carriers injection via tunneling.

Coherent control is a key experimental technique for quantum optics and quantum information processing. We demonstrate a new degree of freedom in coherent control of semiconductor quantum dot (QD) ensembles operating at room temperature using the tunneling injection (TI) processes in which charge carriers tunnel directly from a quantum well reservoir to QD confined states. The TI scheme was originally proposed and implemented to improve QD lasers and optical amplifiers, by providing a direct injection path of cold carriers thereby eliminating the hot carrier injection problem which enhances gain nonlinearity.

Carrier transfer efficiency and its influence on emission properties of telecom wavelength InP-based quantum dot - quantum well structures.

We investigate a hybrid system containing an InGaAs quantum well (QW), separated by a thin 2 nm InGaAlAs barrier from 1.55 µm emitting InAs quantum dots (QDs), grown by molecular beam epitaxy on an InP substrate. Photoreflectance and photoluminescence (PL) spectroscopies are used to identify optical transitions in the system, with support of 8-band kp modelling.

Complete genome sequence of LP1 isolated from an Arctic deep-sea hydrothermal vent system.

LP1 within the family was isolated from a biofilm growing on the surface of a black smoker chimney at the Loki's Castle vent field, located on the Arctic Mid-Ocean Ridge. The complete genome of LP1 is the first genome to be published within the genus LP1 consists of a single 2,966,978 bp circular chromosome with a GC content of 29.8%.