Fine-tuning of whispering gallery modes in on-chip silica microdisk resonators within a full spectral range

Henze, Rico; Pyrlik, Christoph; Thies, A.; Ward, Jonathan; Wicht, Andreas; Benson, Oliver

doi:10.1063/1.4789755

Cited by 17 publications

(9 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Tuning a micron-scale whispering gallery resonator in a fashion that does not add to the footprint of the device or require complicated fabrication is a nontrivial task. The main approaches so far include the use of external heaters 17 18 , application of stress/strain via an external clamp 19 20 21 22 , pressure tuning 23 24 25 26 27 , electric field tuning 28 , chemical etching 29 30 , on-chip resistance heating 31 32 , photorefractive tuning 33 and thermo-optic tuning 34 35 36 . Each of these methods has its own distinct advantages and disadvantages and the choice of method depends ultimately on the final application.…”

mentioning

confidence: 99%

Glass-on-Glass Fabrication of Bottle-Shaped Tunable Microlasers and their Applications

Ward

Yang

Chormaic

2016

Sci Rep

Self Cite

View full text Add to dashboard Cite

We describe a novel method for making microbottle-shaped lasers by using a CO2 laser to melt Er:Yb glass onto silica microcapillaries or fibres. This is realised by the fact that the two glasses have different melting points. The CO2 laser power is controlled to flow the doped glass around the silica cylinder. In the case of a capillary, the resulting geometry is a hollow, microbottle-shaped resonator. This is a simple method for fabricating a number of glass whispering gallery mode (WGM) lasers with a wide range of sizes on a single, micron-scale structure. The Er:Yb doped glass outer layer is pumped at 980 nm via a tapered optical fibre and WGM lasing is recorded around 1535 nm. This structure facilitates a new way to thermo-optically tune the microlaser modes by passing gas through the capillary. The cooling effect of the gas flow shifts the WGMs towards shorter wavelengths and thermal tuning of the lasing modes over 70 GHz is achieved. Results are fitted using the theory of hot wire anemometry, allowing the flow rate to be calibrated with a flow sensitivity as high as 72 GHz/sccm. Strain tuning of the microlaser modes by up to 60 GHz is also demonstrated.

show abstract

mentioning

confidence: 99%

Glass-on-Glass Fabrication of Bottle-Shaped Tunable Microlasers and their Applications

Ward

Yang

Chormaic

2016

Sci Rep

Self Cite

View full text Add to dashboard Cite

show abstract

“…On the other hand, the frequency tuning process to increase the resonant frequency was performed in both coarse and fine tunings as recorded in Figure 34 d. More recently, Henze et al . [ 381 ] demonstrated a post-production hydrofluoric acid etching process for fine-tuning microresonators to reach an arbitrary frequency, and a controllable resonant frequency 10 GHz was observed using this effective approach.…”

Section: Passive Frequency Tuning Methodsmentioning

confidence: 99%

Tunable Micro- and Nanomechanical Resonators

Zhang

Peng

et al. 2015

Sensors

View full text Add to dashboard Cite

Advances in micro- and nanofabrication technologies have enabled the development of novel micro- and nanomechanical resonators which have attracted significant attention due to their fascinating physical properties and growing potential applications. In this review, we have presented a brief overview of the resonance behavior and frequency tuning principles by varying either the mass or the stiffness of resonators. The progress in micro- and nanomechanical resonators using the tuning electrode, tuning fork, and suspended channel structures and made of graphene have been reviewed. We have also highlighted some major influencing factors such as large-amplitude effect, surface effect and fluid effect on the performances of resonators. More specifically, we have addressed the effects of axial stress/strain, residual surface stress and adsorption-induced surface stress on the sensing and detection applications and discussed the current challenges. We have significantly focused on the active and passive frequency tuning methods and techniques for micro- and nanomechanical resonator applications. On one hand, we have comprehensively evaluated the advantages and disadvantages of each strategy, including active methods such as electrothermal, electrostatic, piezoelectrical, dielectric, magnetomotive, photothermal, mode-coupling as well as tension-based tuning mechanisms, and passive techniques such as post-fabrication and post-packaging tuning processes. On the other hand, the tuning capability and challenges to integrate reliable and customizable frequency tuning methods have been addressed. We have additionally concluded with a discussion of important future directions for further tunable micro- and nanomechanical resonators.

show abstract

“…Various post-fabrication resonance tuning schemes for onchip integrated planar WGM cavities have been investigated, which mainly focus on the real part of mode energies. [36][37][38][39][40][41] Among them, EBID as a convenient and precise tool has been employed for generating additional 3D nanostructures, such as nanopillars on top of microdisks [42] and photonic crystals. [43] In the EBID method, released gaseous molecules get decomposed under the irradiation of a focused electron beam, resulting in the growth of nonvolatile structures on the focus site.…”

Section: Working Principlementioning

confidence: 99%

Steering Directional Light Emission and Mode Chirality through Postshaping of Cavity Geometry

Wang

Tang

Yang

et al. 2020

Laser & Photonics Reviews

View full text Add to dashboard Cite

Dielectric optical microcavities have been explored as an excellent platform to manipulate the light flow and investigate non-Hermitian physics in open optical systems. For whispering gallery mode optical microcavities, modifying the rotational symmetry is highly desirable for intriguing phenomena such as degenerated chiral modes and directional light emission. However, for the state-of-the-art approaches, namely deforming the cavity geometry by precision lithography or introducing local scatterers near the cavity boundary via micromanipulation, there is a lack of flexibility in fine-adjusting of chiral symmetry and far-field emission direction. Here, precise engineering of cavity boundary using electron-beam-induced deposition is reported based on rolled-up nanomembrane-enabled spiral-shaped microcavities. The deformation of outer boundary results in delicate tailoring of asymmetric backscattering between the outer and inner rolling edges, and hence deterministically strong mode chirality. Besides, the crescent-shaped high-index nanocap leads to modified light tunneling channels and inflected far-field emission angle. It is envisioned that such a localized deposition-assisted technique for adjusting the structural deformation of 3D optical microcavities will be highly useful for understanding rich insights in non-Hermitian photonics and unfolding exotic properties on lasing, sensing, and cavity quantum electrodynamics.

show abstract

Fine-tuning of whispering gallery modes in on-chip silica microdisk resonators within a full spectral range

Cited by 17 publications

References 14 publications

Glass-on-Glass Fabrication of Bottle-Shaped Tunable Microlasers and their Applications

Glass-on-Glass Fabrication of Bottle-Shaped Tunable Microlasers and their Applications

Tunable Micro- and Nanomechanical Resonators

Steering Directional Light Emission and Mode Chirality through Postshaping of Cavity Geometry

Contact Info

Product

Resources

About