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Terahertz-driven Luminescence and Colossal Stark Effect in CdSe:CdS Colloidal Quantum Dots
Brandt C. Pein, Wendi Chang, Harold Y. Hwang +7
Unique optical properties of colloidal semiconductor quantum dots (QDs), arising from quantum mechanical confinement of charge within these structures, present a versatile testbed…
Terahertz Saturable Absorption in Superconducting Metamaterials
George R. Keiser, Jingdi Zhang, Xiaoguang Zhao +2
We present a superconducting metamaterial saturable absorber at terahertz frequencies. The absorber consists of an array of split ring resonators (SRRs) etched from a 100nm YBaCu3O…
Terahertz radiation-induced sub-cycle field electron emission across a split-gap dipole antenna
Jingdi Zhang, Xiaoguang Zhao, Kebin Fan +5
We use intense terahertz pulses to excite the resonant mode (0.6 THz) of a micro-fabricated dipole antenna with a vacuum gap. The dipole antenna structure enhances the peak amplitu…
Nonlinear terahertz devices utilizing semiconducting plasmonic metamaterials
Huseyin R. Seren, Jingdi Zhang, George R. Keiser +6
The development of responsive metamaterials has enabled the realization of compact tunable photonic devices capable of manipulating the amplitude, polarization, wave vector, and fr…
Structural Control of Metamaterial Oscillator Strength and Electric Field Enhancement at Terahertz Frequencies
George R. Keiser, Huseyin R. Seren, Andrew C. Strikwerda +2
The design of artificial nonlinear materials requires control over the internal resonant charge densities and local electric field distributions. We present a MM design with a stru…
Decoupling Crossover in Asymmetric Broadside Coupled Split Ring Resonators at Terahertz Frequencies
George R. Keiser, Andrew C. Strikwerda, Kebin Fan +3
We investigate the electromagnetic response of asymmetric broadside coupled split ring resonators (ABC-SRRs) as a function of the relative in-plane displacement between the two com…