287 citations · 591 across the 8 of their papers we have counts for
8 papers
Hybrid Electro-Optic Modulator Combining Silicon Photonic Slot Waveguides with High-k Radio-Frequency Slotlines
Sandeep Ummethala, Juned N. Kemal, Ahmed S. Alam +10
Electro-optic (EO) modulators rely on interaction of optical and electrical signals with second-order nonlinear media. For the optical signal, this interaction can be strongly enha…
Generalized Kramers-Kronig Receiver for Coherent THz Communications
Tobias Harter, Christoph Füllner, Juned N. Kemal +9
High-speed communication systems rely on spectrally efficient modulation formats that encode information both on the amplitude and on the phase of an electromagnetic carrier. Coher…
Wireless THz link with optoelectronic transmitter and receiver
Tobias Harter, Sandeep Ummethala, Matthias Blaicher +15
Photonics might play a key role in future wireless communication systems that operate at THz carrier frequencies. A prime example is the generation of THz data streams by mixing op…
THz-to-Optical Conversion in Wireless Communications Using an Ultra-Broadband Plasmonic Modulator
Sandeep Ummethala, Tobias Harter, Kira Koehnle +14
Future wireless communication networks have to handle data rates of tens or even hundreds of Gbit/s per link, requiring carrier frequencies in the unallocated terahertz (THz) spect…
Silicon-plasmonic integrated circuits for terahertz signal generation and coherent detection
Tobias Harter, Sascha Muehlbrandt, Sandeep Ummethala +4
Optoelectronic signal processing offers great potential for generation and detection of ultra-broadband waveforms in the THz range, so-called T-waves. However, fabrication of the u…
Diamond as a material for monolithically integrated optical and optomechanical devices
Patrik Rath, Sandeep Ummethala, Christoph Nebel +1
Diamond provides superior optical and mechanical material properties, making it a prime candidate for the realization of integrated optomechanical circuits. Because diamond sub- st…