We are investigating the improvement of the precision of the means of measurement to determine if it is possible to have sufficient sensitivity to the detection of the effects of elementary particles which would be characteristic of dark matter. A particle has been proposed and is called axion. There would be an interaction between the axions and the photons using the Primakoff effect under strong magnetic field. Radio frequencies from 460 to 810 MHz would be assumed to be suitable for the mass of the axion, if it exists. It is then interesting to focus on the piezoaxionic effect. If the frequency of the axions could match the natural frequency of a normal mode bulk acoustic of a piezoelectric crystal, one would expect the piezoaxionic effect to occur. One could then rely on the piezoelectric effect to observe the variations on the resonant frequency which can be read out electrically using the best piezoelectric materials. Through this example of development and applications in detection, we propose to decrypt this subject and to show how multidisciplinary skills are necessary to hope that small fluctuations can be detectable.
We describe the method that allows us to give an estimation of the uncertainty on the frequency peak by Brillouin Light Scattering. It isthe speed of phonons in a material excited by a visible green 532 nm wavelength laser. We follow the Guide to the Expression of Uncertainty in Measurement to obtain a first estimation of the speed of the phonons at 5 % at 2 sigma.
In this paper, we discuss the principle of coupling an optical signal to an optical resonator. We give the broad outlines of the principle and the experimental parameters then we look at how to optimize this coupling using finite element simulations on COMSOL software. Simulation of the coupling is based on straight and ring waveguides placed very close to each other so the waveguide can be transmitted from one to other.
In this paper, we discuss the principle of coupling an optical signal to an optical resonator. We give the broad outlines of the principle and the experimental parameters then we look at how to optimize this coupling using finite element simulations.
In this poster we are interested in knowing how multi-physic optimization can simulate and be helpful to find an optimal design for resonator coupling. It is based on COMSOL multi-physics software.
Optical resonators are useful to achieve optoelectronics oscillators or frequency combs. High-Q factor resonators for photonics applications are obtained by polishing. To gain in terms of performance, a way is to perform a controlled annealing process to improve the roughness of resonator’s surface down to the nanometer scale. We present the setup and explain it.
Optical resonators with high quality factor, i. e. better than 108, can be useful for frequency combs, sensors or oscillators applications. It is not easily reproducible to couple the light from a tapered fiber to a crystalline resonator, compared to coupling a resonator designed on a chip to a ridge defined on the same chip. Therefore, the simulation and optimization of crystalline resonators under straight waveguides, has to be performed. We must also take into account technological constraints of manufacturing. At Nanoscale, coupling makes our optimization more dynamics in term of designing space. At first step of the multi-physic optimization enables to demonstrate that, we can simulate and then find an optimal design. This process is the same for other application using coupled devices. The sensitivity analysis shows a good correlation between the obtained experimental Q-factor and the one obtained with finite element simulation. This optimization process integrate some constraints related to manufacturing process, and thermal analysis of the resonator. This process can actually bring a great support to define better performances in several applications of these resonators by achieving high performances devices to be characterized, or sensors. However, some parameters require a non-continuous domain, chosen between fixed positions, but it make the convergence more complicated to perform.
Q-factor in optical resonators is important issue that quality the device and the type of applications. Due to the advantages of optical resonators in terms of reproducibility on chip (that are designed of various topologies and integration with optical devices), it is very important to get a highest Qfactor. To increase this factor from the lower rang [104 - 106] to higher one [108 -1010] we use crystalline resonators. In practice, it is more complicated to couple an optical signal from a tapered fiber to crystalline resonator than from a defined ridge to a resonator designed on a chip. In this work, we will focus on the simulation and optimization of the crystalline resonators under straight wave guide and subject also to technological constraints of manufacturing. The coupling problem at the Nano scale makes our optimizations problem more dynamics in term of design space.
Because of the advantages in terms of reproducibility for optical resonators on chip which are designed of various topologies and integration with optical devices. To increase the Q-factor from the lower rang [104 - 106 ] to higher one [108 -1010] [1-4] one use crystalline resonators. It is much complicated to couple an optical signal from a tapered fiber to crystalline resonator than from a defined ridge to a resonator designed on a chip. In this work, we will focus on the optimization of the crystalline resonators under straight wave guide (based on COMSOL multi-physic software) [5- 7] and subject also to technological constraints of manufacturing. The coupling problem at the Nano scale makes our optimizations problem more dynamics in term of design space.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.