How Do Measurements and Excitation Wavelengths Affect Single NV Center Analysis?

  • Context: Graduate 
  • Thread starter Thread starter annaphys
  • Start date Start date
Click For Summary
SUMMARY

This discussion focuses on the impact of measurement techniques and excitation wavelengths on single nitrogen-vacancy (NV) center analysis. Key measurement techniques mentioned include Optically Detected Magnetic Resonance (ODMR), Rabi oscillations, Ramsey interference, and Spin Hahn echo, which yield weaker signals when applied to individual NV centers compared to ensembles. The use of a 517nm diode laser for optical excitation is highlighted, with the suggestion that alternative wavelengths depend on the specific experimental setup, such as cryogenic or room-temperature configurations.

PREREQUISITES
  • Understanding of NV center physics and applications
  • Familiarity with measurement techniques: ODMR, Rabi, Ramsey, Spin Hahn
  • Knowledge of optical excitation methods and laser specifications
  • Experience with experimental setups, particularly cryogenic and room-temperature systems
NEXT STEPS
  • Research the effects of measuring single NV centers versus ensembles
  • Explore alternative excitation wavelengths for NV centers beyond 517nm
  • Investigate the implications of cryogenic setups on NV center measurements
  • Learn about optimizing signal strength in single NV center experiments
USEFUL FOR

Researchers and experimental physicists working with NV centers, particularly those involved in quantum computing, photonics, and materials science, will benefit from this discussion.

annaphys
Messages
69
Reaction score
1
Hello, I have two questions regarding NV centers:

1. Measurements (ODMR, Rabi, Ramsey, Spin Hahn) are done with NV center ensembles. What would change with the measurements if only one NV center is measured?
2. A 517nm diode laser is used for the optical excitation. But this wavelength is different from the wavelength emitted by the NV centers. What other wavelengths could be used instead of the 517nm?
 
Physics news on Phys.org
annaphys said:
Hello, I have two questions regarding NV centers:

1. Measurements (ODMR, Rabi, Ramsey, Spin Hahn) are done with NV center ensembles. What would change with the measurements if only one NV center is measured?
You would get a weaker signal but I guess that is obvious. It is difficult to give a good answer to what else would change since it really depends on how the sample was prepared. Are you only measuring one NV centre because you have a scanning setup that allows you to address individual centres in an ensemble? Or do you you really have a sample with only one (or perhaps just a few) centre?

annaphys said:
2. A 517nm diode laser is used for the optical excitation. But this wavelength is different from the wavelength emitted by the NV centers. What other wavelengths could be used instead of the 517nm?
Its been a long time since I did any work on NV centres, but I am pretty sure you can only answer this once you've decided what you are trying to do. For example, cryogenic setups that combine lasers and RF will be quite different from an RT all optical setup.
 

Similar threads

Undergrad How do two photons affect Rabi oscillations in a 2-level atomic system?
  • · Replies 4 ·
Replies
4
Views
3K
Admissions Could I please get critique on my SOP? (Experimental Biophysics)
  • · Replies 8 ·
Replies
8
Views
847
Graduate Strange Spam Email (The Limitation of the Photon Hypothesis)
  • · Replies 2 ·
Replies
2
Views
2K