Ultra-broadband coplanar waveguide for optically detected magnetic resonance of nitrogen-vacancy centers in diamond

Abstract

We report on coplanar waveguides (CPWs) designed for optically detected magnetic resonance of nitrogen-vacancy (NV) centers in diamonds. A broad band up to 15.8 GHz has been realized, which ensures that the electron spins can be manipulated under external magnetic fields up to 5000 G. The conversion factor of CPW has been measured by Rabi nutation experiments, which ranges from 6.64 G W to 10.60 G W in the frequency band from 0.76 GHz to 17.3 GHz. Broadband CPWs also provide high quality control pulses due to the minimization of the distortion. These characteristics will find potential applications in NV-based quantum information processing and single spin magnetometry.

Microstrip-line resonator with broadband, circularly polarized, uniform microwave field for nitrogen vacancy center ensembles in diamond

“…17 And another circularly polarized planar MW resonator was proposed by Johannes Herrmann et al, 18 but the bandwidth of the resonator was only 60 MHz when the input return loss (S 11 ) was -10 dB. Besides, a non-circularly polarized resonator with high ARTICLE scitation.org/journal/adv homogeneity was proposed by Ning Zhang et al 14 And the resonator with an ultra-broadband (15.8 GHz) coplanar waveguide for optically detected magnetic resonance (ODMR) ensured that electron spins could be manipulated under external magnetic field up to 5000 G. 19 Both the loop-gap resonator used by D. Suter et al 20 and the two-port MW resonator used by David D. Awschalom et al 21 can provide non-circularly polarized MW field with high homogeneity.…”

Principles and techniques of the quantum diamond microscope

“…The simplest way to apply a MW field to the NVs is with a piece of wire connected to a coaxial cable. The QDM MW field is ideally uniform across the NV layer field of view, and there are a variety of alternative engineered MW antennas that aim to optimize the MW field homogeneity, efficiency, or bandwidth [91][92][93][94][95][96][97]. By the transition selection rules, the transitions between 3 A 2 sublevels require left-circularly or right-circularly polarized MW [98].…”

Diamond quantum thermometry: From foundations to applications

“…The timing controlled microwave amplitude is amplified and sent to an antenna. Different types of antenna designs are avaiable, including thin wire [8], coil [108,109], coplanar waveguide [110,111], omega shape antenna [46,112,113] and loop-gap resonators [109,114,115]. Historically, thin metallic wire was frequently used because of the technical simplicity and broad bandwidth having no resonance behaviour over several GHz; such a broad bandwidth is useful when measuring the ODMR spectra in a wide frequency range.…”