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Research

current Research at the IHFG

Chair of semiconductor quantum-optics

The Chair of Semiconductor Optics deals with the following research topics:

Quantum optical properties of semiconductor nanostructures (quantum dots, quantum dot molecules)
Development of single photon sources and semiconducting entangled photon sources
Microlaser: coherence properties and photon statistics
Resonator quantum electrodynamics in semiconductors
III-V semiconductor epitaxy using MOVPE (arsenides, phosphides, nitrides)
Vertical emitting laser (VCSEL) in the red spectral range
Optically pumped semiconductor wafer lasers (OP-SDL, VECSEL) in the red spectral range

Publications

High-fidelity distribution of triggered polarization-entangled telecom photons via a 36 km intra-city fiber network

Photo: ihfg

Coherently and Incoherently Pumped Telecom C-Band Single-Photon Source with High Brightness and Indistinguishability

Photo: ihfg

Surface relief VCSELs at 670 nm with integrated polymer microlens for highly collimated fundamental-mode emission

Photo: IHFG

Growth of telecom C-band In(Ga)As quantum dots for silicon quantum photonics

Photo: IHFG

Highly Indistinguishable Single Photons from Droplet-Etched GaAs Quantum Dots Integrated in Single-Mode Waveguides and Beamsplitters

Photo: IHFG

Robust excitation of C-band quantum dots for quantum communication

Bright Source of Purcell-Enhanced, Triggered, Single Photons in the Telecom

Photo: IHFG

A Unipolar Quantum Dot Diode Structure for Advanced Quantum Light Sources

Photo: ihfg

Membrane saturable absorber mirror (MESAM) in a red-emitting VECSEL for the generation of stable ultrashort pulses

Photo: ihfg

Purcell enhanced single-photon emission from a quantum dot coupled to a truncated Gaussian microcavity (featured)

Photo: ihfg

MOVPE grown InGaAs quantum dots with emission near 1.3 m for electrically driven single-photon sources

Photo: ihfg

Achieving stable fiber coupling of quantum dot telecom C-band single-photons to an SOI photonic device

Photo: ihfg

Vertical External Cavity Surface Emitting Lasers

Photo: ihfg

Bright Purcell Enhanced Single-Photon Source in the Telecom O-Band Based on a Quantum Dot in a Circular Bragg Grating

Photo: ihfg

Resonance fluorescence of single In(Ga)As quantum dots emitting in the telecom C-band

Photo: ihfg

Quantum dot-based broadband optical antenna for efficient extraction of single photons in the telecom O-band

Coherence and indistinguishability of highly pure single photons from non-resonantly and resonantly excited telecom C-band quantum dots

Wavelength tunable ultraviolet laser emission via intra-cavity frequency doubling of an AlGaInP vertical external-cavity surface-emitting laser down to 328 nm

Photo: IHFG

Cascaded Single-Photon Emission from the Mollow Triplet Sidebands of a Quantum Dot

Photo: IHFG

Epitaxially Grown Indium Phosphide Quantum Dots on a Virtual Ge Substrate Realized on Si(001)

Photo: IHFG

Single-photon emission from electrically driven InP quantum dots epitaxially grown on CMOS-compatible Si(001)

Photo: IHFG

Quantum key distribution using quantum dot single-photon emitting diodes in the red and near infrared spectral range

Photo: IHFG

Strong antibunching from electrically driven devices with long pulses: A regime for quantum-dot single-photon generation

Photo: IHFG

Visible-to-Telecom Quantum Frequency Conversion of Light from a Single Quantum Emitter

Photo: IHFG

Triggered Indistinguishable Single Photons with Narrow Line Widths from Site-Controlled Quantum Dots

Photo: IHFG

Phonon-assisted incoherent excitation of a quantum dot and its emission properties

Photo: IHFG

Site-controlled growth of InP/GaInP islands on periodic hole patterns in GaAs substrates produced by microsphere photolithography

Photo: IHFG

Electrically driven quantum dot single-photon source at 2 GHz excitation repetition rate with ultra-low emission time jitter

Photo: IHFG

Strain compensation techniques for red AlGaInP-VECSELs: Performance comparison of epitaxial designs

Photo: IHFG

Influence of the oxide aperture radius on the mode spectra of (Al,Ga)As vertical microcavities with electrically excited InP quantum dots

Photo: IHFG

Strong mode coupling in InP quantum dot-based GaInP microdisk cavity dimers

Photo: IHFG

Detuning-dependent Mollow triplet of a coherently-driven single quantum dot

Photo: IHFG

High-power InP quantum dot based semiconductor disk laser exceeding 1.3 W

Photo: IHFG

Mollow quintuplets from coherently excited quantum dots

Photo: IHFG

Postselected indistinguishable single-photon emission from the Mollow triplet sidebands of a resonantly excited quantum dot

Photo: IHFG

Mode-locked red-emitting semiconductor disk laser with sub-250 fs pulses

Photo: IHFG

On-demand generation of indistinguishable polarization-entangled photon pairs

Photo: IHFG

Spectroscopy of the D1 transition of cesium by dressed-state resonance fluorescence from a single (In,Ga)As/GaAs quantum dot

Photo: IHFG

Monolithic on-chip integration of semiconductor waveguides, beamsplitters and single-photon sources

Photo: IHFG

Metal-organic vapor-phase epitaxy-grown ultra-low density InGaAs/GaAs quantum dots exhibiting cascaded single-photon emission at 1.3 µm

Photo: IHFG

Phonon-assisted robust and deterministic two-photon biexciton preparation in a quantum dot

Photo: IHFG

Fabrication and optical characterization of large scale membrane containing InP/ AlGaInP quantum dots

Photo: IHFG

On-chip beamsplitter operation on single photons from quasi-resonantly excited quantum dots embedded in GaAs rib waveguides

Photo: IHFG

Intra-cavity frequency-doubled mode-locked semiconductor disk laser at 325 nm

Photo: IHFG

Photonische Schaltkreise mit Einzelphotonenquellen

Photo: IHFG

Sichere Kommunikation per Quantenrepeater

Photo: IHFG

Generation, guiding and splitting of triggered single photons from a resonantly excited quantum dot in a photonic circuit

Photo: IHFG

Cavity-enhanced simultaneous dressing of quantum dot exciton and biexciton states

Photo: IHFG

Neutral and charged biexciton-exciton cascade in near-telecom-wavelength quantum dots

Photo: IHFG

Low-noise quantum frequency down-conversion of indistinguishable photons

Photo: IHFG

Fully On-Chip Single-Photon Hanbury-Brown and Twiss Experiment on a Monolithic Semiconductor–Superconductor Platform

Photo: IHFG

Simultaneous Faraday filtering of the Mollow triplet sidebands with the Cs-D1 clock transition

Semiconductor membrane external-cavity surface-emitting laser (MECSEL)

Quantum Dots for Quantum Information Technologies

Quantum-Dot Single-Photon Sources for Entanglement Enhanced Interferometry

Polarization-entangled photons from an InGaAs-based quantum dot emitting in the telecom C-band

Self-mode-locked AlGaInP-VECSEL

Chem/bio sensing with non-classical light and integrated photonics

Two-photon interference in an atom–quantum dot hybrid system

Overcoming correlation fluctuations in two-photon interference experiments with differently bright and independently blinking remote quantum emitter

Pure single-photon emission from In(Ga)As QDs in a tunable fiber-based external mirror microcavity

Bragg grating cavities embedded into nano-photonic waveguides for Purcell enhanced quantum dot emission

Deterministic fabrication of circular Bragg gratings coupled to single quantum emitters via the combination of in-situ optical lithography and electron-beam lithography

Deterministic integration and optical characterization of telecom O-band quantum dots embedded into wet-chemically etched Gaussian-shaped microlenses

Two-photon interference in the telecom C-band after frequency conversion of photons from remote quantum emitters

Epitaxy

Information on the workgroup semiconductor-epitaxy

Quantum Optics

Information on the workgroup semiconductor-quantumoptics

publications

IHFG`s publications

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