Widely tunable room temperature semiconductor terahertz source

We present a widely tunable, monolithic terahertz source based on intracavity difference frequency generation within a mid-infrared quantum cascade laser at room temperature. A three-section ridge waveguide laser design with two sampled grating sections and a distributed-Bragg section is used to achieve the terahertz (THz) frequency tuning. Room temperature single mode THz emission with a wide tunable frequency range of 2.6–4.2 THz (∼47% of the central frequency) and THz power up to 0.1 mW is demonstrated, making such device an ideal candidate for THz spectroscopy and sensing.

[1]  Manijeh Razeghi,et al.  Continuous operation of a monolithic semiconductor terahertz source at room temperature , 2014 .

[2]  Manijeh Razeghi,et al.  Room temperature single-mode terahertz sources based on intracavity difference-frequency generation in quantum cascade lasers , 2011 .

[3]  M. Koch,et al.  Terahertz spectroscopy and imaging – Modern techniques and applications , 2011 .

[4]  Ehsan Afshari,et al.  Delay coupled oscillators for frequency tuning of solid-state terahertz sources. , 2012, Physical review letters.

[5]  David A. Ritchie,et al.  Tunable terahertz quantum cascade lasers with an external cavity , 2007 .

[6]  Seungyong Jung,et al.  External cavity terahertz quantum cascade laser sources based on intra-cavity frequency mixing with 1.2–5.9 THz tuning range , 2014 .

[7]  Manijeh Razeghi,et al.  Dual section quantum cascade lasers with wide electrical tuning , 2013, Photonics West - Optoelectronic Materials and Devices.

[8]  P. Siegel.  THz Instruments for Space , 2007, IEEE Transactions on Antennas and Propagation.

[9]  Manijeh Razeghi,et al.  Sampled grating, distributed feedback quantum cascade lasers with broad tunability and continuous operation at room temperature , 2012 .

[10]  Masayoshi Tonouchi,et al.  Cutting-edge terahertz technology , 2007 .

[11]  E. Linfield,et al.  Terahertz semiconductor-heterostructure laser , 2002, Nature.

[12]  R. Blanchard,et al.  Widely tunable mid-infrared quantum cascade lasers using sampled grating reflectors. , 2012, Optics express.

[13]  Manijeh Razeghi,et al.  Extended electrical tuning of quantum cascade lasers with digital concatenated gratings , 2013 .

[14]  Manijeh Razeghi,et al.  Room temperature terahertz quantum cascade laser sources with 215 μW output power through epilayer-down mounting , 2013 .

[15]  J. Faist,et al.  Room temperature terahertz quantum cascade laser source based on intracavity difference-frequency generation , 2008 .

[16]  Seungyong Jung,et al.  Broadly tunable monolithic room-temperature terahertz quantum cascade laser sources , 2014, Nature Communications.

[17]  Qing Hu,et al.  MEMS-based tunable terahertz wire-laser over 330 GHz. , 2011, Optics letters.

[18]  L. Coldren,et al.  Theory, design, and performance of extended tuning range semiconductor lasers with sampled gratings , 1993 .

[19]  Manijeh Razeghi,et al.  Widely tuned room temperature terahertz quantum cascade laser sources based on difference-frequency generation , 2012 .