Efficient, tunable, and coherent 018–527-THz source based on GaSe crystalKonstantin L. Vodopyanov, Yujie J. Ding, Nils C. Fernelius|Optics Letters|2002Cited by 400
Tunable and coherent nanosecond radiation in the range of 2.7–28.7 μm based on difference-frequency generation in gallium selenideNils C. Fernelius, Yujie J. Ding, Xiaodong Mu|Applied Physics Letters|2002Cited by 57
Observation of difference-frequency generation by mixing of terahertz and near-infrared laser beams in a GaSe crystalF. Ken Hopkins, Yujie J. Ding, Nils C. Fernelius|Applied Physics Letters|2006Cited by 54
THz generation from InN films due to destructive interference between optical rectification and photocurrent surgeGuibao Xu, James S. Speck, Nils C. Fernelius et al.|Semiconductor Science and Technology|2009Cited by 27
Investigation of Terahertz Generation due to Unidirectional Diffusion of Carriers in Centrosymmetric GaTe CrystalsGuibao Xu, Nils C. Fernelius, Guan Sun et al.|IEEE Journal of Selected Topics in Quantum Electronics|2010Cited by 11