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Ultra strong light matter coupling with THz nano antennas: towards the few electron systems
(2020)Other Conference Item -
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High-performance THz QCL frequency combs
(2020)Proceedings of SPIE ~ Quantum Sensing and Nano Electronics and Photonics XVIIA broadband, Cu-Cu THz quantum cascade laser is presented. The device shows an 50% improved dynamical range and doubled peak power in pulsed compared to Au-Au devices. The pulsed maximum lasing temperature was increased from 105 K to 133 K. In CW similar bandwidths for Cu-Cu and Au-Au devices are observed with an increased temperature performance. At 77 K the emitted power of the device is reduced by 57% compared to 30 K. At this temperature ...Other Conference Item -
Terahertz quantum optics in the time-domain: from field correlation measurements on vacuum field fluctuations in free space towards cavity electro-optics
(2020)OSA Technical Digest ~ Conference on Lasers and Electro-OpticsThe ground state of electromagnetic radiation is characterised by a fluctuating electromagnetic field even in a vacuum. We measure its correlation function as a function of time and space using the electro-optic effect. We determine the spectral content and the amplitude of this state and find excellent agreement with the second quatisation theory.Other Conference Item -
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Direct field correlation measurements on THz modes with sub-unity photon occupation number
(2019)Other Conference Item -
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Direct field correlation measurements on THz modes with sub-unity photon occupation number
(2019)Other Conference Item -
New frontiers for THz quantum cascade lasers: NEGF optimisation and fabrication of devices operating above 210 K
(2019)Other Conference Item