TITLE

186 K operation of terahertz quantum-cascade lasers based on a diagonal design

AUTHOR(S)
Kumar, Sushil; Hu, Qing; Reno, John L.
PUB. DATE
March 2009
SOURCE
Applied Physics Letters;3/30/2009, Vol. 94 Issue 13, p131105
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Resonant-phonon terahertz quantum-cascade lasers operating up to a heat-sink temperature of 186 K are demonstrated. This record temperature performance is achieved based on a diagonal design, with the objective to increase the upper-state lifetime and therefore the gain at elevated temperatures. The increased diagonality also lowers the operating current densities by limiting the flow of parasitic leakage current. Quantitatively, the diagonality is characterized by a radiative oscillator strength that is smaller by a factor of two from the least of any previously published designs. At the lasing frequency of 3.9 THz, 63 mW of peak optical power was measured at 5 K, and approximately 5 mW could still be detected at 180 K.
ACCESSION #
37321920

 

Related Articles

  • Design and Application of Pulse Laser Diode Drive. Jassim, Awatif Sabir // European Journal of Scientific Research;12/ 1/2010, Vol. 47 Issue 3, p395 

    In this work a circuit drive for pulsed laser diode has been designed with (904nm, 200ns, 10W per pulse) and the performance of this circuit was studied , The specification semiconductor laser (SC) has been studied , the result shows increasing in current causes an increasing in the power, but...

  • High-resolution emission spectra of pulsed terahertz quantum-cascade lasers. Ikonnikov, A.; Antonov, A.; Lastovkin, A.; Gavrilenko, V.; Sadof'ev, Yu.; Samal, N. // Semiconductors;Nov2010, Vol. 44 Issue 11, p1467 

    The spectra of pulsed terahertz quantum-cascade lasers were measured with high spectral resolution. The characteristic line width at half maximum was 0.01 cm; it is controlled by laser temperature variations during the supply voltage pulse. It was shown that an increase in the laser temperature...

  • Studying the frequency tuning of pulsed terahertz quantum cascade lasers. Lastovkin, A.; Ikonnikov, A.; Gavrilenko, V.; Antonov, A.; Sadof'ev, Yu. // Radiophysics & Quantum Electronics;Jan2012, Vol. 54 Issue 8/9, p609 

    Radiation spectra of pulsed quantum cascade lasers operated at about 2.6 and 3.2 THz have been studied using the Fourier-transform technique. Tuning of the laser radiation frequency by 5.4 GHz in a temperature variation range of 8 to 86 K for the 2.6 THz laser and by 2.7 GHz in a range of 10 to...

  • Inversionless amplification in semiconductor nanostructures: A way to create a frequency-tunable laser of far-infrared and terahertz radiation. Kukushkin, V. // Semiconductors;Nov2010, Vol. 44 Issue 11, p1435 

    scheme of a far-infrared and terahertz amplifier or laser based on a semiconductor nanostructure, consisting of a superlattice of double quantum wells of a certain design placed into a planar metal waveguide and pumped by a CO laser, is suggested. The structure operation is based on the...

  • Effect of gain saturation on the current-power characteristic of semiconductor laser. Sokolovskii, G.; Dudelev, V.; Deryagin, A.; Kuchinskii, V. // Technical Physics Letters;Jul2012, Vol. 38 Issue 7, p613 

    It is shown that, when temperature effects are excluded, even a small bend of the current-power characteristic of a semiconductor laser caused by gain saturation indicates that the carrier concentration that is necessary to maintain lasing should be increased by several times (i.e., that the...

  • Diagnostics of quantum cascade structures by optical methods in the near infrared region. Kryzhkov, D.; Morozov, S.; Gaponova, D.; Sergeev, S.; Kuritsyn, K.; Maremyanin, K.; Gavrilenko, V.; Sadofyev, Yu. // Semiconductors;Nov2012, Vol. 46 Issue 11, p1411 

    The spectra and kinetics of the low-temperature interband photoluminescence of epitaxial structures of terahertz quantum cascade lasers is studied under conditions of strong pulsed excitation. Photoluminescence corresponding to transitions between both the ground and excited states of two...

  • Analysis of lasers as a solution to efficiency droop in solid-state lighting. Chowa, W. W.; Crawford, M. H. // Applied Physics Letters;2015, Vol. 107 Issue 14, p1 

    This letter analyzes the proposal to mitigate the efficiency droop in solid-state light emitters by replacing InGaN light-emitting diodes (LEDs) with lasers. The argument in favor of this approach is that carrier-population clamping after the onset of lasing limits carrier loss to that at...

  • British terahertz laser chip sets new record.  // Engineer (Online Edition);2/18/2014, p3 

    The article reports on the terahertz laser chip developed by Leeds University researchers that managed to exceed the world record output power for quantum cascade terahertz lasers established by the Massachusetts Institute of Technology (MIT) and Vienna University of Technology.

  • Tunable Terahertz Lasers: A wrench of wavelength. Gmachl, Claire // Nature Photonics;Dec2009, Vol. 3 Issue 12, p683 

    The article focuses on the tuning of the emission wavelength of quantum cascade lasers (QCLs) that operate in the terahertz region. It is stated that one way of turning a semiconductor laser ridge into a single-mode laser is to achieve distributed feedback (DFB). It is mentioned that...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

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

Try another library?
Sign out of this library

Other Topics