Self-sustained coherent phonon generation in optomechanical cavities

Navarro-Urriós, D.; Gomis-Brescó, Jordi; Alzina, Francesc; Capuj, N. E.; García, Pedro David; Colombano, Martín F.; Chávez‐Ángel, Emigdio; Torres, C. M. Sotomayor

doi:10.1088/2040-8978/18/9/094006

Cited by 14 publications

(19 citation statements)

References 60 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The nominal values of the pitch, hole diameter and stub width are 500, 300 and 250 nm, respectively. The fabrication process of these OM nanobeams is detailed elsewhere 8 . The fabrication process is explained in the Supporting Information.…”

Section: Thermal Conductivity Measurements By μ-Tdtrmentioning

confidence: 99%

“…Since the heat dissipation rate  obtained by µ-TDTR is not strictly equivalent to the thermal decay rate th in optomechanical devices due to the added contribution of the suspended central section and gold pad and their heat capacity. The nanobeams studied here have been extensively used as a platform for OM experiments, including self-pulsing 6,8 , chaotic behaviour 7 , injection locking 42 and synchronisation 43 , among others 23,27 . In this context, nonlinear dynamics involving self-pulsing limit cycle has played a key role.…”

Section: Thermal Dynamics By Optical Resonance Coolingmentioning

confidence: 99%

See 1 more Smart Citation

Thermal Properties of Nanocrystalline Silicon Nanobeams

Maire

Chávez‐Ángel

Arregui

et al. 2021

Adv Funct Materials

View full text Add to dashboard Cite

Controlling thermal energy transfer at the nanoscale and thermal properties has become critically important in many applications since it often limits device performance. In this study, the effects on thermal conductivity arising from the nanoscale structure of free-standing nanocrystalline silicon films and the increasing surface-to-volume ratio when fabricated into suspended optomechanical nanobeams are studied. Thermal transport and elucidate the relative impact of different grain size distributions and geometrical dimensions on thermal conductivity are characterized. A micro time-domain thermoreflectance method to study free-standing nanocrystalline silicon films and find a drastic reduction in the thermal conductivity, down to values below 10 W m -1 K -1 is used, with a stronger decrease for smaller grains. In optomechanical nanostructures, this effect is smaller than in membranes due to the competition of surface scattering in decreasing thermal conductivity. Finally, a novel versatile contactless characterization technique that can be adapted to any structure supporting a thermally shifted optical resonance is introduced. The thermal conductivity data agrees quantitatively with the thermoreflectance measurements. This study opens the way to a more generalized thermal characterization of optomechanical cavities and to create hotspots with engineered shapes at the desired position in the structures as a means to study thermal transport in coupled photon-phonon structures.

show abstract

Section: Thermal Conductivity Measurements By μ-Tdtrmentioning

confidence: 99%

Section: Thermal Dynamics By Optical Resonance Coolingmentioning

confidence: 99%

Thermal Properties of Nanocrystalline Silicon Nanobeams

Maire

Chávez‐Ángel

Arregui

et al. 2021

Adv Funct Materials

View full text Add to dashboard Cite

show abstract

“…Currently, SAW as well as membrane‐based PnCs suffers from the absence of coherent sources of phonons breaking the threshold of few gigahertz. The game changer which will allow using the wealth of PnCs features is expected from the structures being both phononic and photonic, i.e., phoXonic or optomechanical (OM) crystals . The different electromagnetic and elastic wave velocities allow the localization of both types of waves in the same length scale, despite their very different frequencies.…”

Section: Prospectsmentioning

confidence: 99%

2D Phononic Crystals: Progress and Prospects in Hypersound and Thermal Transport Engineering

Sledzinska

Graczykowski

Maire

et al. 2019

Adv Funct Materials

View full text Add to dashboard Cite

The central concept in phononics is the tuning of the phonon dispersion relation, or phonon engineering, which provides a means of controlling related properties such as group velocity or phonon interactions and, therefore, phonon propagation, in a wide range of frequencies depending on the geometries and sizes of the materials. Phononics exploits the present state of the art in nanofabrication to tailor dispersion relations in the range of GHz for the control of elastic waves/phonons propagation with applications toward new information technology concepts with phonons as state variable. Moreover, phonons provide an adaptable approach for supporting a coherent coupling between different state variables, and the development of nanoscale optomechanical systems during the last decade attests this prospect. The most extended approach to manipulate the phonon dispersion relation is introducing an artificial periodic modulation of the elastic properties, which is referred to as phononic crystal (PnC). Herein, the focus is on the recent experimental achievements in the fabrication and application of 2D PnCs enabling the modification of the dispersion relation of surface and membrane modes, and presenting phononic bandgaps, waveguiding, and confinement in the hypersonic regime. Furthermore, these artificial materials offer the potential of modifying and controlling the heat flow to enable new schemes in thermal management.

show abstract

“…They can trigger an oscillation from a direct continuous source without needing feedback electronics by using mechanisms such as the retarded radiation-pressure force [13], the back-action induced by the bolometric light force [17] or by coupling the optomechanical system to carrier/thermal self-sustained cyclic dynamics [18]. In these cases, their all-optical operation, ease of miniaturization, low power consumption and scalability make these oscillators potential candidates as optically-driven phonon sources [19] and a possible replacement to conventional quartz-based oscillators in specific RF-photonic communication and sensing applications such as optical down-conversion [20] or mass sensing [21]. Although the reported output stability of OMOs approaches state-of-the-art optoelectronic oscillators [22], their performance is often degraded by mechanical effects such as slow frequency drift [23], intrinsic [24] or thermomechanical noise [25] and by instabilities occurring at large displacement amplitudes [26].…”

mentioning

confidence: 99%

Injection locking in an optomechanical coherent phonon source

Arregui¹,

Colombano²,

Maire³

et al. 2020

Preprint

View full text Add to dashboard Cite

Spontaneous locking of the phase of a coherent phonon source to an external reference is demonstrated in an optomechanical oscillator based on a self-triggered free-carrier/temperature limit cycle. Synchronization is observed when the pump laser driving the mechanical oscillator to a self-sustained state is modulated by a radiofrequency tone. We employ a pump-probe phonon detection scheme based on an independent optical cavity to observe only the mechanical oscillator dynamics. The lock range of the oscillation frequency, i.e., the Arnold tongue, is experimentally determined over a range of external reference strengths, evidencing the possibility to tune the oscillator frequency for a range up to 350 kHz. The stability of the coherent phonon source is evaluated via its phase noise, with a maximum achieved suppression of 44 dBc/Hz at 1kHz offset for a 100 MHz mechanical resonator. Introducing a weak modulation in the excitation laser reveals as a further knob to trigger, control and stabilise the dynamical solutions of self-pulsing based optomechanical oscillators, thus enhancing their potential as acoustic wave sources in a single layer silicon platform.

show abstract

Self-sustained coherent phonon generation in optomechanical cavities

Cited by 14 publications

References 60 publications

Thermal Properties of Nanocrystalline Silicon Nanobeams

Thermal Properties of Nanocrystalline Silicon Nanobeams

2D Phononic Crystals: Progress and Prospects in Hypersound and Thermal Transport Engineering

Injection locking in an optomechanical coherent phonon source

Contact Info

Product

Resources

About