Quantum efficiency of InSbBi quantum dot photodetector

Abstract

An InSb(1-x)Bi(x) quantum dot (QD) photodetector was studied in this work. First, the quantum efficiency (QE) was modeled for this structure where the relations of electron and hole densities and their contribution to current density are derived. The absorption of p-, n- and depletion regions were calculated before specifying their contribution to QE. It is shown that adding Bi to Sb-based QD structures increases their absorption and QE. High Bi content extended the cutoff detection wavelength of these detectors.

Plasmonic Quantum Dot Nanocavity Laser: Hybrid Modes

“…The energy subbands are calculated by solving the Schrödinger equation for this quantum disk shape, assuming parabolic subbands [20]. Such calculated QD subbands by the quantum disk model were compared earlier with the experiment [21,22]. (1) Solving the wave equation for H !…”

“…The second one is our code that is written in our laboratory to solve QD problems beginning from calculating its energy subbands going to its optical properties, like gain. This code is used in a large number of our published papers and checked with experiment; see for example [21][22][23]. Our software is connected with RECTWG code where they are adopted to study the properties of the derived mode in this work.…”

A Plasmonic quantum dot nanolaser: effect of “waveguide Fermi energy” on material gain

“…This is due to negative real part of permittivity at optical frequencies. Therefore, metal-semiconductormetal (MSM) waveguide was the base of plasmonic waveguide nanocavity that supports surface-plasmon-polaritons (SPPs), however the main challenge is the significant loss of metal which require high gain active medium to balance losses [1] [4] [5].…”

“…They exhibit unexpected characteristics due to their incredible small size with quantum mechanical behavior [5]. QD structure contains a QD layer grown into wetting layer (WL) which is in the form of a quantum well layer.…”

QE of cadmium sulphide QD photodetectors

“…Quantum efficiency (QE) is an important figure of merit for photonic devices [3]. It is basically another parameter to express the effectiveness of the incident optical energy for producing an output of electrical current.…”