High-Q conical polymeric microcavities

Großmann, Tobias; Hauser, Mario; Beck, Torsten; Gohn-Kreuz, Cristian; Karl, Matthias; Kalt, H.; Vannahme, Christoph; Mappes, Timo

doi:10.1063/1.3280044

Cited by 99 publications

(53 citation statements)

References 23 publications

(15 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For microdisks with thicknesses above 3 µm the surface-scattering loss of the WGMs at the top and bottom microdisk surface becomes negligible. Q factors above 10 6 are comparable to values achieved in polymeric microcavities fabricated by replica molding [7,8] and by thermal reflow techniques [9,10], making DLW a competitive fabrication technique with the additional advantage of a high degree of design freedom.…”

Section: Optical Characterization Of Passive Microcavitiessupporting

confidence: 52%

“…The combination of long photon lifetime with the advantages of polymers, such as low material cost and easy doping, make them potentially attractive for a wide range of applications. In order to achieve high-Q polymeric microcavities via lithographic structuring, techniques like replica molding [7,8] and thermal-reflow methods with surface-tension induced cavity geometries [9,10] have been investigated. These methods allow for smooth cavity surfaces with reduced lithographic blemishes, which typically limit the Q factors of the WGMs due to surface scattering loss.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Direct laser writing for active and passive high-Q polymer microdisks on silicon

Großmann¹,

Schleede²,

Hauser³

et al. 2011

Opt. Express

Self Cite

View full text Add to dashboard Cite

Abstract:We report the fabrication of high-Q polymeric microdisks on silicon via direct laser writing utilizing two-photon absorption induced polymerization. The quality factors of the passive cavities are above 10 6 in the 1300 nm wavelength region. The flexible three-dimensional (3D) lithography method allows for the fabrication of different cavity thicknesses on the same substrate, useful for rapid prototyping of active and passive optical microcavities. Microdisk lasers are realized by doping the resist with dye, resulting in laser emission at visible wavelengths. ©2011 Optical Society of America

show abstract

Section: Optical Characterization Of Passive Microcavitiessupporting

confidence: 52%

Section: Introductionmentioning

confidence: 99%

Direct laser writing for active and passive high-Q polymer microdisks on silicon

Großmann¹,

Schleede²,

Hauser³

et al. 2011

Opt. Express

Self Cite

View full text Add to dashboard Cite

show abstract

“…Besides high optical transparency, polymers are favorable for laser device fabrication due to large scale (soft-)lithographic structuring techniques, low material costs and simple doping with a broad variety of gain media. Currently, by either direct lithographic fabrication and subsequent surface tension-enhanced thermal reflow [7] or replica molding of an ultra-high-Q master [8], Q factors above 10 6 have been achieved in planar (on-chip), polymeric WGMmicroresonators.…”

Section: Introductionmentioning

confidence: 99%

Strongly confined, low-threshold laser modes in organic semiconductor microgoblets

Großmann¹,

Klinkhammer²,

Floess³

et al. 2011

Opt. Express

Self Cite

View full text Add to dashboard Cite

Abstract:We investigate lasing from high-Q, polymeric goblet-type microcavities covered by an organic semiconductor gain layer. We analyze the optical modes in the high-Q cavities using finite element simulations and present a numerical method to determine the cutoff thickness of the gain layer above which the whispering gallery modes are strongly confined in this layer. Fabricated devices show reduced lasing thresholds for increasing gain layer thicknesses, which can be explained by a higher filling factor of the optical modes in the gain layer. Furthermore, reduced lasing threshold is accompanied by a red-shift of the laser emission.

show abstract

“…11 These resonators are compatible with large-scale fabrication and are mechanically stable. Tunability of the cavity resonances is linked to the control of the resonator diameter.…”

Section: Sample Fabricationmentioning

confidence: 89%

Optically controlled elastic microcavities

et al. 2015

Self Cite

View full text Add to dashboard Cite

Whispering gallery mode (WGM) resonators made from dielectrics like glass or polymers have outstanding optical properties like huge cavity quality (Q) factors which can be achieved on scales compatible with on-chip integration. However, tunability of these resonances is typically difficult to achieve or not suitable for robust device applications. We report here on the fabrication of polymeric micro-goblet WGM resonators with an optically controlled and stable reversible tunability over a large spectral range. This tunability is achieved by integration of photo-responsive liquid crystalline elastomers (LCEs) into micro-goblet cavities. The optical response of the elastomer allows reshaping the goblet by employing low pump power, leading to a fully reversible tuning of the modes. The structure can be realistically implemented in on-chip devices, combining the ultra-high Q factors, typical of WGM resonators, with reliable, optical tunability. This result serves as an example of how light can control light, by invoking a physical reshaping of the structure. This way of optical tuning creates interesting possibilities for all-optical control in circuits, enabling interaction between signal and control beams and the realization of self-tuning cavities. Keywords: liquid crystal elastomers; polymeric cavities; tunable micro-resonators; whispering gallery modes INTRODUCTION Solid-state optical microcavities are versatile photonic devices which come in a large variety of appearances. 1 Of particular interest are whispering gallery mode (WGM) resonators which feature small modal volume and large quality (Q) factors. 2 They are highly attractive for fundamental physics studies like cavity quantum electrodynamics, 3 as well as for applications like single photon sources, 4 optical sensing 5 or communication technology. 6,7 A key feature of WGM microcavities is the occurrence of ultra-narrow optical resonances and the functionality of the cavity often relies on the shift of the resonance frequency. This is the case, e.g., for optical sensors where the modal shift indicates the presence of attached bio-molecules or a change in the composition of the surrounding medium. 5 Essential features of such resonators are thus a large free spectral range and a narrow linewidth of the resonances but for many applications additionally an active manipulation of the cavity resonances is required. Examples are the tuning of the cavity into resonance with a quantum emitter 8,9 or utilization of the cavity in optical filters and light modulators. 10 In the last decade, a new class of WGM resonators has emerged featuring ultra-high Q factors. These resonators have spherical, cylindrical, toroidal, disk or goblet shapes 1,9,11 and are made of silica, polymers or liquids. Besides their excellent sensing capabilities they can also be turned into micro-lasers when incorporating laser dyes 12 or quantum dots 13 or be coupled to form photonic molecules. 14 But an obstacle effectively hindering some applications of these cavities is the limited tunab...

show abstract

High-Q conical polymeric microcavities

Cited by 99 publications

References 23 publications

Direct laser writing for active and passive high-Q polymer microdisks on silicon

Direct laser writing for active and passive high-Q polymer microdisks on silicon

Strongly confined, low-threshold laser modes in organic semiconductor microgoblets

Optically controlled elastic microcavities

Contact Info

Product

Resources

About