45 citations · 90 across the 6 of their papers we have counts for
7 papers
Quantum Cascade Surface Emitting Lasers
David Stark, Filippos Kapsalidis, Sergej Markmann +5
A low-cost single frequency laser emitting in the mid-infrared spectral region and dissipating minimal electrical power is a key ingredient for the next generation of portable gas…
Frequency chirped Fourier-Transform spectroscopy
Sergej Markmann, Martin Frankié, Mathieu Bertrand +6
Fast (sub-second) spectroscopy with high spectral resolution is of vital importance for revealing quantum chemistry kinetics of complex chemical and biological reactions. Fourier t…
An ultrastrongly coupled single THz meta-atom
Shima Rajabali, Sergej Markmann, Elsa Jöchl +5
Free-space coupling to strongly subwavelength individual optical elements is a central theme in quantum optics, as it allows to control and manipulate the properties of quantum sys…
THz intersubband electroluminescence from n-type Ge/SiGe quantum cascade structures
David Stark, Muhammad Mirza, Luca Persichetti +15
We report electroluminescence originating from L-valley transitions in n-type Ge/SiGe quantum cascade structures centered at 3.4 and 4.9 THz with a line broadenin…
Universal nuclear focusing of confined electron spins
Sergej Markmann, Christian Reichl, Werner Wegscheider +1
For spin-based quantum computation in semiconductors, dephasing of electron spins by a fluctuating background of nuclear spins is a main obstacle. Here we show that this nuclear ba…
Nanoscale nonlinear effects in Erbium-implanted Yttrium Orthosilicate
Nadezhda Kukharchyk, Stepan Shvarkov, Sebastian Probst +11
Doping of substrates at desired locations is a key technology for spin-based quantum memory devices. Focused ion beam implantation is well-suited for this task due to its high spac…
Strong Coupling of Intersubband Resonance in a High Electron Mobility Transistor Structure to a THz Metamaterial by Ultrawide Electrical Tuning
Shovon Pal, Hanond Nong, Sergej Markmann +8
The interaction between intersubband resonances (ISRs) and metamaterial microcavities can form a strongly coupled system where new resonances form that depend on the coupling stren…