Results 141 to 150 of about 12,195 (298)
Terahertz photonic crystal quantum cascade lasers [PDF]
We combine photonic crystal and quantum cascade band engineering to create an in-plane laser at terahertz frequency. We demonstrate that such photonic crystal lasers strongly improve the performances of terahertz quantum cascade material in terms of ...
Faist, Jerome +4 more
core +1 more source
Control and measurement of ultrafast pulses for pump/probe-based metrology
, 2008 In this thesis the control of ultrafast (10⁻¹³ s) optical pulses used for metrological applications has been investigated. Two different measurement set-ups have been considered, both based around the `pump-probe' technique, where an optical pulse is ...
Harper, Matthew R.
core
Frequency-tunable external cavity terahertz quantum cascade laser
, 2009 We demonstrate a tunable terahertz quantum cascade laser using an abutted silicon lens and grating feedback.
Qi Qin +9 more
core +1 more source
Toward Highest Frequency, Phase‐Sensitive Electric Field Sensing Enabled by Plasmonic Circuits
Laser &Photonics Reviews, EarlyView.An electromagnetic field sensor using an optical sensor head for distortion‐free, high‐sensitivity measurements with potential for high‐frequency operation is presented. The frequency response is enabled by an antenna‐integrated plasmonic modulator. The sensitivity is calculated, and optimizations to obtain thermal‐background‐limited sensitivity are ...
Michael Baumann +5 more
wiley +1 more source
Laser &Photonics Reviews, EarlyView.The miniaturization of metrology and precision spectroscopy systems requires robust, turn‐key microcombs with broad bandwidth, low threshold, and high efficiency. Here, high‐Q, dispersion‐engineered microresonators in a high‐confinement nonlinear SiC platform, combined with waveguide‐enabled thermal management and laser cooling, enable deterministic ...
Yi Zheng +7 more
wiley +1 more source
Yakın gerçek zaman işlemli, fiberde tümleşik atmalı terahertz spektrometre [PDF]
, 2015 TÜBİTAK TBAG01.08.2015TUBİTAK tarafından desteklenen 111T748 nolu, “Yakın Gerçek Zaman İşlemli, Fiberde Tümleşik Atmalı Terahertz Spektrometre” başlıklı araştırma projesinden elde edilen sonuçlar açıklanmaktadır.
Özkan, Ali Vedat +8 more
core
Stimulated Forward Brillouin Scattering in Subwavelength Grating Silicon Membranes
Laser &Photonics Reviews, EarlyView.This work proposes a novel strategy to achieve large Brillouin scattering with independent control of the optical and mechanical modes using subwavelength silicon membranes. We experimentally demonstrate remarkably high Brillouin gain, resulting in an on/off Stokes gain of 3 dB and anti‐Stokes loss of 4 dB in a 6 mm‐long waveguide with 35 mW of on‐chip
Paula Nuño Ruano +8 more
wiley +1 more source
Terahertz Laser Frequency Combs
Advanced Photonics 2015, 2015 By using a carefully designed and fabricated integrated dispersion compensator, we were able to develop high-power laser frequency combs at THz, which will enable the high resolution (~kHz) and S/N ratios of laser spectroscopy, the broadband capabilities of FTIR (>1 THz), all with no mechanical moving parts. Article not available.
openaire +2 more sources
Laser Terahertz Emission Microscope
2006 Joint 31st International Conference on Infrared Millimeter Waves and 14th International Conference on Teraherz Electronics, 2006 This paper reviews developments of laser terahertz emission microscope, and its application to visualize various natures in electronic materials such as high-Tc superconductors, ferroelectrics, and semiconductor devices.
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Terahertz emission in organic crystals pumped by conventional laser wavelength
Intense Terahertz radiation in organic crystals is typically generated by optical rectification of short wavelength infrared femtosecond lasers between 1.3 and 1.5 μm.
Vicario, Carlo +5 more
core +1 more source