Theory of the Intrinsic Linewidth of Quantum-Cascade Lasers: Hidden Reason for the Narrow Linewidth and Line-Broadening by Thermal Photons

Masamichi Yamanishi, Tadataka Edamura, Kazuue Fujita, +2

IEEE Journal of Quantum Electronics

Thz PhotonicsQuantum PhotonicsIntrinsic LinewidthEngineeringLaser Science +14

Recent progress in terahertz difference-frequency quantum cascade laser sources

Kazuue Fujita, Seungyong Jung, Yifan Jiang, +6

Nanophotonics

Thz PhotonicsTerahertz TechnologyEngineeringTerahertz PhotonicsHigh-power Lasers +18

High-performance, homogeneous broad-gain quantum cascade lasers based on dual-upper-state design

Kazuue Fujita, Tadataka Edamura, Shinichi Furuta, +1

Applied Physics Letters

PhotonicsPhotoluminescenceEngineeringQuantum ComputingLaser Science +10

Indirect pump scheme for quantum cascade lasers: dynamics of electron-transport and very high T0-values

Masamichi Yamanishi, Kazuue Fujita, Tadataka Edamura, +1

Optics Express

Optical PumpingQuantum SciencePhotonicsQuantum Cascade LasersEngineering +11

Sub-terahertz and terahertz generation in long-wavelength quantum cascade lasers

Kazuue Fujita, Shohei Hayashi, Akio Ito, +2

Nanophotonics

Thz PhotonicsTerahertz TechnologyEngineeringThz Spectral RangeTerahertz Generation +15

Terahertz generation in mid-infrared quantum cascade lasers with a dual-upper-state active region

Kazuue Fujita, Masahiro Hitaka, Akio Ito, +4

Applied Physics Letters

Thz PhotonicsTerahertz TechnologyEngineeringLaser ScienceTerahertz Generation +16

Ultra-broadband room-temperature terahertz quantum cascade laser sources based on difference frequency generation

Kazuue Fujita, Masahiro Hitaka, Akio Ito, +3

Optics Express

Thz PhotonicsTerahertz TechnologyEngineeringLaser ScienceMid-infrared Qcl +15

Broad-gain (Δλ/λ_0~04), temperature-insensitive (T_0~510K) quantum cascade lasers

Kazuue Fujita, Shinichi Furuta, Tatsuo Dougakiuchi, +3

Optics Express

Quantum SciencePhotonicsQuantum Cascade LasersEngineeringPhotoluminescence +12

Room temperature, continuous-wave operation of quantum cascade lasers with single phonon resonance-continuum depopulation structures grown by metal organic vapor-phase epitaxy

Kazuue Fujita, Shunsuke Furuta, Atsushi Sugiyama, +5

Applied Physics Letters

Optical PumpingPhotonicsRoom TemperatureQuantum PhotonicsQuantum Cascade Lasers +13

Extremely high T-values (∼450 K) of long-wavelength (∼15 μm), low-threshold-current-density quantum-cascade lasers based on the indirect pump scheme

Kazuue Fujita, Masamichi Yamanishi, Tadataka Edamura, +2

Applied Physics Letters

High Device PerformanceEngineeringLaser ScienceLaser ApplicationsSuper-intense Lasers +14