Fano Resonance in a cavity-reflector hybrid system

Abstract

We present the results of transport measurements in a hybrid system consisting of an arch-shaped quantum point contact (QPC) and a reflector; together, they form an electronic cavity in between them. On tuning the arch-QPC and the reflector, asymmetric resonance peak in resistance is observed at the one-dimension to two-dimension transition. Moreover, a dip in resistance near the pinch-off of the QPC is found to be strongly dependent on the reflector voltage. These two structures fit very well with the Fano line shape. The Fano resonance was found to get weakened on applying a transverse magnetic field, and it smeared out at 100 mT. In addition, the Fano like shape exhibited a strong temperature dependence and gradually smeared out when the temperature was increased from 1.5 to 20 K. The results might be useful in realising device for quantum information processing.

References in corpus (5)

• Quantum nature of a strongly-coupled single quantum dot-cavity system
• Beyond the Jaynes-Cummings model: circuit QED in the ultrastrong coupling regime
• Quantum control of a spin qubit coupled to a photonic crystal cavity
• Detector Backaction on the Self-Consistent Bound State in Quantum Point Contacts
• Tuning the Fano Resonance with an Intruder Continuum

Cited by in corpus (4)

• Spin-Seebeck effect and spin polarization in a multiple quantum dot molecule
• Direct observation of exchange-driven spin interactions in one-dimensional system
• Interference Effects in a Tunable Quantum Point Contact Integrated with an Electronic Cavity
• Temperature Dependence of Spin-Split Peaks in Transverse Electron Focusing