Integrated terahertz pulse generation and amplification in quantum cascade lasers

Dhillon, S. S.; Sawallich, S.; Jukam, N.; Oustinov, D.; Madéo, J.; Barbieri, S.; Filloux, P.; Sirtori, C.; Marcadet, X.; Tignon, J.
February 2010
Applied Physics Letters;2/8/2010, Vol. 96 Issue 6, p061107
Academic Journal
Integrated terahertz (THz) pulse generation and amplification in a THz quantum cascade laser (QCL) is demonstrated. Intracavity THz pulses are generated by exciting the facet of the QCL with an ultrafast Ti:Sapphire laser (∼100 fs) and detected using electro-optic sampling. Maximum THz field emission is found with an interband transition of 1.535 eV (809 nm) and by narrowing the excitation laser bandwidth to ∼3 THz. These resonance conditions correspond to the narrowband excitation of the quantum cascade miniband, indicating that the THz pulse is generated by the photoexcited carriers that are accelerated by the applied field. The generated pulse is subsequently amplified by the narrowband gain of the laser as it propagates through the QCL cavity.


Related Articles

  • Linewidth enhancement factor of terahertz quantum cascade lasers. Green, Richard P.; Ji-Hua Xu; Mahler, Lukas; Tredicucci, Alessandro; Beltram, Fabio; Giuliani, Guido; Beere, Harvey E.; Ritchie, David A. // Applied Physics Letters;2/18/2008, Vol. 92 Issue 7, p071106 

    The linewidth enhancement factor (LEF) of terahertz quantum cascade lasers is measured using an optical feedback self-mixing technique. As expected, a much lower LEF is found than is common for interband lasers, but instead of the predicted value of zero, the LEF depends on the laser conditions...

  • Polarization-sensitive air-biased-coherent-detection for terahertz wave. Lü, Zhihui; Zhang, Dongwen; Meng, Chao; Sun, Lin; Zhou, Zhaoyan; Zhao, Zengxiu; Yuan, Jianmin // Applied Physics Letters;8/20/2012, Vol. 101 Issue 8, p081119 

    Employing an orientation-modulated bias field, a polarization-sensitive scheme for terahertz air-biased-coherent-detection (THz-ABCD) is presented to directly measure the amplitude and polarization angle of THz field in the time domain. It can provide all characteristics of arbitrarily polarized...

  • Pump-Probe Scheme Allows Terahertz Generation And Detection.  // Microwaves & RF;Aug2009, Vol. 48 Issue 8, p56 

    The article focuses on the performance of terahertz time domain spectroscopy. It states that terahertz time domain spectroscopy enables the engineer to measure complex amplitude instead of the intensity of the terahertz probe. It notes that the researchers from Beijing University of Posts and...

  • Few-femtosecond timing at fourth-generation X-ray light sources. Tavella, F.; Stojanovic, N.; Geloni, G.; Gensch, M. // Nature Photonics;Mar2011, Vol. 5 Issue 3, p162 

    Fourth-generation X-ray light sources are being developed to deliver laser-like X-ray pulses at intensities and/or repetition rates that are beyond the reach of table-top devices. An important class of experiments at these new facilities comprises pump-probe experiments, which are designed to...

  • Broadband terahertz light source pumped by a 1 μm picosecond laser. Miyamoto, Katsuhiko; Lee, Andrew; Saito, Takefumi; Akiba, Takuya; Suizu, Koji; Omatsu, Takashige // Applied Physics B: Lasers & Optics;Mar2013, Vol. 110 Issue 3, p321 

    We obtained a frequency tunable, low-coherence, picosecond, terahertz (THz) output with a high repetition rate from a picosecond Nd:YVO bounce laser in combination with tandem periodically poled stoichiometric lithium tantalate and 4′-dimethylamino- N-methyl-4-stilbazolium tosylate...

  • Metrology: Sampling without synchronization. Kono, Shunsuke // Nature Photonics;Oct2007, Vol. 1 Issue 10, p564 

    The article presents a study on an electro-optic scheme for sampling the electric field of laser pulses without the need for any synchronization. Researchers showed an experimental method that has the potential to measure the emission frequency and time dynamics of a source that emits between 0...

  • Characterizing the polarity of a few-cycle infrared laser pulse. Bai, Y.; Li, C.; Liu, P.; Li, R.; Xu, R.; Yang, H.; Zeng, Z.; Lu, H.; Hu, G.; Lei, A.; Leng, Y.; Xu, Z. // Applied Physics B: Lasers & Optics;Jan2012, Vol. 106 Issue 1, p45 

    We demonstrate the characterization of polarity and carrier-envelope (CE) phase of a linearly polarized few-cycle infrared (IR) laser pulse (12 fs, 1.8 µm) using Terahertz (THz) emission spectroscopy. Crossed polarizers electro-optic sampling geometry is applied to record temporal waveforms...

  • Strongly subluminal regime of optical-to-terahertz conversion in GaP. Bakunov, M. I.; Tsarev, M. V.; Bodrov, S. B.; Tani, M. // Journal of Applied Physics;Apr2009, Vol. 105 Issue 8, p083111 

    We introduce and investigate a special regime of terahertz generation in electro-optic crystals with ultrashort laser pulses, in which neither phase-matching nor Cherenkov radiation mechanism are efficient. This regime occurs under the conditions that the optical group refractive index is larger...

  • Ultrafast multi-terahertz nano-spectroscopy with sub-cycle temporal resolution. Eisele, M.; Cocker, T. L.; Huber, M. A.; Plankl, M.; Huber, R.; Viti, L.; Ercolani, D.; Sorba, L.; Vitiello, M. S. // Nature Photonics;Nov2014, Vol. 8 Issue 11, p841 

    Phase-locked ultrashort pulses in the rich terahertz spectral range have provided key insights into phenomena as diverse as quantum confinement, first-order phase transitions, high-temperature superconductivity and carrier transport in nanomaterials. Ultrabroadband electro-optic sampling of...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics