Magnetic-field-dependent stimulated emission from nitrogen-vacancy centers in diamond

Abstract

Negatively charged nitrogen-vacancy (NV) centers in diamond are promising magnetic field quantum sensors. Laser threshold magnetometry theory predicts improved NV center ensemble sensitivity via increased signal strength and magnetic field contrast. Here, we experimentally demonstrate laser threshold magnetometry. We use a macroscopic high-finesse laser cavity containing a highly NV-doped and low absorbing diamond gain medium that is pumped at 532 nm and resonantly seeded at 710 nm. This enables a 64% signal power amplification by stimulated emission. We test the magnetic field dependency of the amplification and thus demonstrate magnetic field–dependent stimulated emission from an NV center ensemble. This emission shows an ultrahigh contrast of 33% and a maximum output power in the milliwatt regime. The coherent readout of NV centers pave the way for novel cavity and laser applications of quantum defects and diamond NV magnetic field sensors with substantially improved sensitivity for the health, research, and mining sectors.

Toward Simultaneous Coherent Radiation in the Visible and Microwave Bands with Doped Molecular Crystals

“…[87] On the other hand, the lasing and masing output can be enhanced by the exploration of novel host materials enabling the higher doping concentrations [88,89] and optimum intersystem crossing yield of the dopant [90] while maintaining the desired population inversion in its singlet and triplet states. We envision that the correlation and manipulation of the optical and microwave photons simultaneously generated by the proposed multiband coherent source are worth being investigated for fundamental tests of quantum optics, the possibility of phase locking for development of self-referenced frequency combs and optimization of the solid-state quantum sensors exploiting the nonlinear behaviors of the stimulated emission in either the microwave [6] or visible [5] band.…”

“…A well-established approach to achieve coherent electromagnetic radiation is to exploit the stimulated emission process [1] induced by interactions between electromagnetic fields and matters. Stemming from the discovery of the stimulated emission, optical lasers spanning from the ultraviolet to the near-infrared region, together with their forerunners and microwave analogs, masers, have become indispensable coherent sources for applications in telecommunication, [2] metrology, [3,4] sensing, [5][6][7] machining, [8] and quantum information. [9,10] In addition, the recent development of terahertz [11] and X-ray [12] lasers has offered alluring promise of shedding light on astronomical observations, spectroscopy and structural biology.…”

Absorption and birefringence study for reduced optical losses in diamond with high nitrogen-vacancy concentration

“…For a precise study of absorption at approximately 700 nm, we measured the sample with an integrating sphere at the wavelength of 680-760 nm to gather all transmitted light in this regime. The absorption coefficient A coef in this case is given by Hahl [38]:…”

Enhanced Energy Transfer between Nitrogen‐Vacancy Centers and 2D MoS2 Films Accurately Fabricated by Atomic Layer Deposition

“…[8][9][10][11][12] Compared with traditional dye molecules, NV centers have excellent photostability, [13] unique room temperature spin properties, [14] chemical inertness, [15] and excellent biocompatibility. [16] Moreover, the NV center can be used to measure physical quantities such as magnetic field, [17] electric field, [18] stress, [19] and temperature, [20] and it has high sensitivity. In addition, FRET has been demonstrated between NV centers and organic dye molecules, graphene.…”