Journal Articles (10)

• Muehlbrandt, S.; Harter, T.; Fuellner, C.; Ummethala, S.; Wolf, S.; Bacher, A.; Hahn, L.; Kohl, M.; Freude, W.; Koos, C.
  Field-effect silicon-plasmonic photodetector for coherent T-wave reception
  Opt. Express 29, 21586-21602 (2021) [DOI]


• Ummethala, S.; Alam, A. S.; Lauermann, M.; Kuzmin, A.; Kutuvantavida, Y.; Nandam, S. H.; Hahn, L.; Elder, D. L.; Dalton, L. R.; Zwick, T.; Randel, S.; Freude, W.; Koos, C.; Kemal, J. N.
  Hybrid Electro-Optic Modulator Combining Silicon Photonic Slot Waveguides with High-k Radio-Frequency Slotlines
  Optica 8, 511-519 (2021) [DOI]


• Harter, T.; Fuellner, C.; Kemal, J. N.; Ummethala, S.; Steinmann, J. L.; Brosi, J.-M.; Hesler, J. L.; Bruendermann, E.; Mueller, A.-S.; Freude, W.; Randel, S.; Koos, C.
  Generalized Kramers–Kronig receiver for coherent terahertz communications
  Nature Photonics 14, 601-606 (2020) more


• Harter, T.; Ummethala, S.; Blaicher, M.; Muehlbrandt, S.; Wolf, S.; Weber, M.; Adib, M. M. H.; Kemal, J. N.; Merboldt, M.; Boes, F.; Nellen, S.; Tessmann, A.; Walther, M.; Globisch, B.; Zwick, T.; Freude, W.; Randel, S.; Koos, C.
  Wireless THz link with optoelectronic transmitter and receiver
  Optica 6, 1063--1070 (2019) [DOI]


• Ummethala, S.; Harter, T.; Koehnle, K.; Li, Z.; Muehlbrandt, S.; Kutuvantavida, Y.; Kemal, J. N.; Marin-Palomo, P.; Schaefer, J.; Tessmann, A.; Garlapati, S. K.; Bacher, A.; Hahn, L.; Walther, M.; Zwick, T.; Randel, S.; Freude, W.; Koos, C.
  THz-to-optical conversion in wireless communications using an ultra-broadband plasmonic modulator
  Nature Photonics 13, 519-524 (2019) [DOI]


• Harter, T.; Muehlbrandt, S.; Ummethala, S.; Schmid, A.; Nellen, S.; Hahn, L.; Freude, W.; Koos, C.
  Silicon–plasmonic integrated circuits for terahertz signal generation and coherent detection
  Nature Photonics 12, 625--633 (2018) [DOI]


• Koos, C.; Leuthold, J.; Freude, W.; Kohl, M.; Dalton, L. R.; Bogaerts, W.; Giesecke, A. L.; Lauermann, M.; Melikyan, A.; Koeber, S.; Wolf, S.; Weimann, C.; Muehlbrandt, S.; Koehnle, K.; Pfeifle, J.; Hartmann, W.; Kutuvantavida, Y.; Ummethala, S.; Palmer, R.; Korn, D.; Alloatti, L.; Schindler, P. C.; Elder, D. L.; Wahlbrink, T.; Bolten, J.
  Silicon-Organic Hybrid (SOH) and Plasmonic-Organic Hybrid (POH) Integration
  J. Lightwave Technol. 34, 01-13 (2016) [DOI] more, (invited)


• Rath, P.; Ummethala, S.; Nebel, C.; Pernice, W. H. P.
  Diamond as a material for monolithically integrated optical and optomechanical devices
  physica status solidi (a) 212, 2385--2399 (2015) [DOI]


• Rath, P.; Ummethala, S.; Diewald, S.; Lewes-Malandrakis, G.; Brink, D.; Heidrich, N.; Nebel, C.; Pernice, W. H. P.
  Diamond electro-optomechanical resonators integrated in nanophotonic circuits
  Applied Physics Letters 105 (2014) [DOI]


• Ummethala, S.; Rath, P.; Lewes-Malandrakis, G.; Brink, D.; Nebel, C.; Pernice, W. H. P.
  High-Q optomechanical circuits made from polished nanocrystalline diamond thin films
  Diamond and Related Materials 44, 49 - 53 (2014) [DOI]