Observation of low optical overlap mode propagation in nanoscale indium phosphide membrane waveguides

Whaley, R.D.; Khalfin, V.; Lipp, S.; Chan, W.K.; An, H.; Abeles, J.H.

doi:10.1063/1.2430624

Cited by 7 publications

(3 citation statements)

References 11 publications

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“…The difficulty faced by most evanescent wave sensor architectures lies in the lack of strong interaction between the analytes (target species) and the evanescent field. This is primarily due to the use of strongly confined waveguide designs (Whaley et al, 2007). So we utilize the concept of small optical mode area structure in core, where a nanoscale core region is used, which results in a large and distended mode.…”

Section: Theoretical Detailmentioning

confidence: 99%

Analytical analysis of sensitivity of optical waveguide sensor

Verma¹,

Prajapati²,

Ayub³

et al. 2011

Int. J. Eng. Sci. Tech

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Section: Theoretical Detailmentioning

confidence: 99%

Analytical analysis of sensitivity of optical waveguide sensor

Verma¹,

Prajapati²,

Ayub³

et al. 2011

Int. J. Eng. Sci. Tech

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“…It continues to find its applications in display, solar cell, and light-emitting devices, as well as optical films with optimized functions, because it is capable of controlling the optical path to enhance either light emission or absorption performance. [1][2][3][4] Accordingly, this technology has been a focus of research and development efforts, but its practical availability still lags behind market demand. Candidates for potential technical strategies for large-area nanopatterning include flat-bed large-area nanoimprinting [5][6][7] and roll nanoimprinting.…”

Section: Introductionmentioning

confidence: 99%

Large-Area Nanotemplate Process and Its Application to Roll Imprint

Choi

Lee

et al. 2012

Jpn. J. Appl. Phys.

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This study developed a stitching process for unit element nanotemplates based on step and repeat imprinting for use in enlarged soft mold fabrication. This mold was subsequently used for the custom-developed roll-to-plate UV nanoimprint process. The distinctive features of roll UV imprinting include the following: (1) the UV source is embedded within a roll mold made of quartz so that it can illuminate a resist coated on either a transparent or an opaque substrate, (2) the press-contact between the resist and soft mold wrapped around the quartz mold was designed to synchronize the rolling operation with the linear motion of the substrate, which helped minimize the residue thickness, and (3) a compressed pneumatic force was applied along the contact line of the roll imprint, which helped attenuate any possible level mismatch on the stitched mold surface. #

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“…Shown right a blow up of the EWS sensitivity shows this structure catastrophically loses both sensitivity and modal integrity. EWS data taken from[5].…”

mentioning

confidence: 99%

Amorphous photonic membranes for broadband chemical sensing applications

Abbey

Whaley

2012

SPIE Proceedings

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While there has been extensive development on integrated sensors in the near-IR region due to the maturation of Si, SOI, and III-V materials, these technologies are not easily translated into the visible and near-UV regions which are critical for the detection of many chemicals of environmental and security interest. This work focuses on the use of wide bandgap, amorphous materials, specifically, amorphous zinc oxide (a-ZnO), amorphous hafnium oxide (a-HfO 2 ) and amorphous beryllium zinc oxide (a-BeZnO), in the development of broadband chemical sensors operating at critical absorption lines spanning the near-UV (200 nm) to the near-IR (1.55 µm).The architecture employed for this research is a nanoscale membrane (typically 40 -100 nm thick) that supports a guided low optical overlap mode (LOOM) -an optical mode in which approximately 1% of the electric field is confined to the lossy core region. The resulting extended mode has a greatly enhanced analyte overlap, yielding a device sensitivity (~70%) that is over an order of magnitude higher than current high-performance, dielectric evanescent wave sensors (~2%) as modeled by analytical and finite element methods. Due to the extended nature of the LOOM, sensing across the entire spectral range can be achieved with a single waveguide design -critical for multi-point chemical sensing architectures.

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Observation of low optical overlap mode propagation in nanoscale indium phosphide membrane waveguides

Abstract: Absorption cross section and signal enhancement in Er-doped Si nanocluster rib-loaded waveguides

Cited by 7 publications

References 11 publications

Analytical analysis of sensitivity of optical waveguide sensor

Analytical analysis of sensitivity of optical waveguide sensor

Large-Area Nanotemplate Process and Its Application to Roll Imprint

Amorphous photonic membranes for broadband chemical sensing applications

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