HIGH-PRECISION GHZ CLOCK GENERATION USING SPIN STATES IN DIAMOND

摘要

Techniques for obtaining a frequency standard using the crystal field splitting frequency of nitrogen vacancy center in diamond are disclosed. In certain exemplary embodiments, a microwave field is applied to the diamond and optically exciting the diamond under green light. The photoluminescent response of the diamond is measured by a photodetector. The intensity of the photoluminescent response can be used to determine the phase shift between the microwave and the crystal field splitting frequency. The microwave field frequency can be adjusted until the phase shift is below a predetermined threshold, and the microwave frequency can then be output for use as a standard.

主权项

1. A method for obtaining a frequency standard using the crystal field splitting frequency of at least one nitrogen vacancy center in at least one diamond structure, comprising:
applying a microwave field to the at least one diamond structure, the microwave field having an adjustable and an initial frequency; optically exciting the at least one diamond structure to create photoluminescence having a photoluminescent characteristic based at least on the frequency of the microwave field; detecting at least a first measurement of the photoluminescent characteristic at the initial microwave frequency; determining, based on the first measurement, a phase shift for the known microwave frequency from the constant crystal field splitting frequency of the at least one diamond structure; varying the frequency of the microwave field until the phase shift is below a predetermined threshold; and using the frequency of the microwave field as a frequency standard.