Quest to semiconductor intraband terahertz lasers : From p-Ge intersubband and CR lasers to cascade and Si donor Raman lasers

Polariton devices offer multiple advantages compared to conventional semiconductor devices. The bosonic nature of exciton polaritons offers opportunity of realisation of polariton lasers: coherent light sources based on bosonic condensates of polaritons. The final state stimulation of any transition feeding a polariton condensate has been used in many proposals such as for terahertz lasers based on polariton lasers. Furthermore, large coherence lengths of exciton-polaritons in microcavities open the way to realisation of polariton transport devices including transistors and logic gates. Being bosonic spin carriers, exciton-polaritons may be used in spintronic devices and polarisation switches. This chapter offers an overview on the existing proposals for polariton devices.

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Laser Pulse Shortening via Zero-Dispersion Phase Matching of Parametric Raman Interactions in Crystals

Crystals ◽

10.3390/cryst11010019 ◽

2020 ◽

Vol 11 (1) ◽

pp. 19

Author(s):

Sergei N. Smetanin ◽

Michal Jelínek ◽

Dmitry P. Tereshchenko ◽

Mikhail N. Ershkov ◽

Václav Kubeček

Keyword(s):

Laser Pulse ◽

Short Pulse ◽

Matching Condition ◽

Phase Matching ◽

Dispersion Phase ◽

Birefringent Crystal ◽

Raman Lasers ◽

Birefringent Crystals ◽

Phase Matching Condition ◽

Ultra Short Pulse

We propose and study the conditions of zero-dispersion phase matching for parametric Raman interactions in birefringent crystals differing by anisotropy of zero-dispersion wavelength and allowing for the spectral tuning of the zero-dispersion phase-matching condition. We choose a highly birefringent crystal of calcite having a wide zero-dispersion anisotropy range for the demonstration of new effects of laser pulse shortening in parametric Raman lasers with spectrally tunable zero-dispersion phase matching. We demonstrate the anti-Stokes (1168 nm) and multi-Stokes (1629 nm) picosecond pulse shortening and self-separation of single 80-ps ultra-short pulse from the zero-dispersion phase-matched parametric Raman lasers that are based on the calcite crystal without using any electro-optical device.

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Multifunctional Optical Crystals for All-Solid-State Raman Lasers

Crystals ◽

10.3390/cryst11020114 ◽

2021 ◽

Vol 11 (2) ◽

pp. 114

Author(s):

Hui Zhao ◽

Shibo Dai ◽

Siqi Zhu ◽

Hao Yin ◽

Zhen Li ◽

...

Keyword(s):

Solid State ◽

Continuous Wave ◽

Frequency Doubling ◽

Raman Laser ◽

Rare Earth Ions ◽

Excellent Performance ◽

The Past ◽

Raman Lasers ◽

Optical Crystals ◽

Laser Crystals

In the past few decades, the multifunctional optical crystals for all-solid-state Raman lasers have been widely studied by many scholars due to their compactness, convenience and excellent performance. In this review, we briefly show two kinds of multifunctional Raman crystals: self-Raman (laser and Raman effects) crystals and self-frequency-doubled Raman (frequency-doubling and Raman effects) crystals. We firstly introduce the properties of the self-Raman laser crystals, including vanadate, tungstate, molybdate and silicate doped with rare earth ions, as well as self-frequency-doubled Raman crystals, including KTiOAsO4 (KTA) and BaTeMo2O9 (BTM). Additionally, the domestic and international progress in research on multifunctional Raman crystals is summarized in the continuous wave, passively Q-switched, actively Q-switched and mode-locked regimes. Finally, we present the bottleneck in multifunctional Raman crystals and the outlook for future development. Through this review, we contribute to a general understanding of multifunctional Raman crystals.

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Diamonds give Raman lasers new properties

Materials Today ◽

10.1016/s1369-7021(09)70268-8 ◽

2009 ◽

Vol 12 (10) ◽

pp. 12

Author(s):

Laurie Donaldson

Keyword(s):

Raman Lasers

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Stable single-mode operation of surface-emitting terahertz lasers with graded photonic heterostructure resonators

Applied Physics Letters ◽

10.1063/1.4809918 ◽

2013 ◽

Vol 102 (23) ◽

pp. 231105 ◽

Cited By ~ 10

Author(s):

Gangyi Xu ◽

Yacine Halioua ◽

Souad Moumdji ◽

Raffaele Colombelli ◽

Harvey E. Beere ◽

...

Keyword(s):

Single Mode ◽

Single Mode Operation ◽

Mode Operation ◽

Terahertz Lasers

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Terahertz-wave generation using graphene

MRS Proceedings ◽

10.1557/opl.2012.1186 ◽

2012 ◽

Vol 1437 ◽

Author(s):

Taiichi Otsuji ◽

Stephane Boubanga Tombet ◽

Akira Satou ◽

Maxim Ryzhii ◽

Victor Ryzhii

Keyword(s):

Terahertz Wave ◽

Wave Generation ◽

Nonequilibrium Carrier ◽

Terahertz Range ◽

Two Dimensional ◽

Carrier Relaxation ◽

Dynamic Conductivity ◽

Electrically Pumped ◽

Terahertz Lasers ◽

Recombination Dynamics

ABSTRACTIn this paper recent advances in terahertz-wave generation in graphene are reviewed. First, fundamental basis of the optoelectronic properties of graphene is introduced. Second, nonequilibrium carrier relaxation and recombination dynamics in optically or electrically pumped graphene is described to introduce a possibility of negative dynamic conductivity in a wide terahertz range. Third, recent theoretical advances toward the creation of current-injection graphene terahertz lasers are described. Fourth, unique terahertz dynamics of the two-dimensional plasmons in graphene are described. Finally, the advantages of graphene materials and devices for terahertz-wave generation are summarized.

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