A Fully Integrated DAC for CMOS Position-Based Charge Qubits with Single-Electron Detector Loopback Testing

Parallel single molecule detection with a fully integrated single-photon 2x2 CMOS detector array.

We present parallel single molecule detection (SMD) and fluorescence correlation spectroscopy (FCS) experiments with a fully integrated complementary metal oxide semiconductor (CMOS) single-photon 2x2 detector array. Multifocal excitation is achieved with a diffractive optical element (DOE). Special emphasis is placed on parallelization of the total system. The performance of the novel single-p...

Charge Caching CMOS Detector for Polarimetry (CPo)

CPo is a concept for a novel array detector concept that is optimized for highly sensitive and precise differential imaging such as needed for astrophysical polarimetry. Chopping between two or more independent image states (such as four linearly independent polarization states) can be performed at speeds in the kHz domain to provide virtually simultaneous images without the need to read out th...

Fully Integrated CMOS Power Amplifier

Charge noise in single-electron transistors and charge qubits may be caused by metallic grains

We report on measurements of low-frequency noise in a single-electron transistor SET from a few hertz up to 10 MHz. Measurements were done for different bias and gate voltages, which allow us to separate noise contributions from different noise sources. We find a 1 / f noise spectrum with two Lorentzians superimposed. The cut-off frequency of one of the Lorentzians varies systematically with th...

Radio-frequency single-electron transistor as readout device for qubits: charge sensitivity and backaction.

We study the radio-frequency single-electron transistor (rf-SET) as a readout device for charge qubits. We measure the charge sensitivity of an rf-SET to be 6.3microe/sqrt[Hz] and evaluate the backaction of the rf-SET on a single Cooper-pair box. This allows us to compare the needed measurement time with the mixing time of the qubit imposed by the measurement. We find that the mixing time can b...