Optomechanical zipper cavity lasers: theoretical analysis of tuning range and stability

Alegre, Thiago P. Mayer; Perahia, R.; Painter, Oskar

doi:10.1364/oe.18.007872

Cited by 24 publications

(18 citation statements)

References 40 publications

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“…A cavity optomechanical system (COMS) is used to sense magnetic field induced deformations of a magnetostrictive material, which are detected with an all-in-fiber optical system suitable for the telecom wavelength range. The presence of mechanical and optical resonances greatly enhances both the response to the magnetic field and the measurement sensitivity.Three implementations using different types of COMS are investigated, microscale Fabry-Perot resonators [17], optomechanical zipper cavities [18], and toroidal whispering gallery mode (TWGM) resonators [19], all of which are approximately 50 µm in size. Theoretical modelling predicts ultimate Brownian noise limited sensitivities at the level of 200 pT Hz −1/2 , 10 pT Hz −1/2 , and 700 fT Hz −1/2 , respectively for each architecture.…”

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confidence: 99%

“…Three implementations using different types of COMS are investigated, microscale Fabry-Perot resonators [17], optomechanical zipper cavities [18], and toroidal whispering gallery mode (TWGM) resonators [19], all of which are approximately 50 µm in size. Theoretical modelling predicts ultimate Brownian noise limited sensitivities at the level of 200 pT Hz −1/2 , 10 pT Hz −1/2 , and 700 fT Hz −1/2 , respectively for each architecture.…”

mentioning

confidence: 99%

“…To estimate the achievable field sensitivity we consider three realistic scenarios based on different COMS, a TWGM resonator, an optomechanical zipper cavity [18], and a miniature Fabry-Perot resonator with suspended micro-mirror [17], as depicted in Fig. 1a-c.…”

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Cavity Optomechanical Magnetometer

et al. 2012

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A cavity optomechanical magnetometer is demonstrated. The magnetic field induced expansion of a magnetostrictive material is resonantly transduced onto the physical structure of a highly compliant optical microresonator, and read-out optically with ultra-high sensitivity. A peak magnetic field sensitivity of 400 nT Hz −1/2 is achieved, with theoretical modeling predicting the possibility of sensitivities below 1 pT Hz −1/2 . This chipbased magnetometer combines high-sensitivity and large dynamic range with small size and room temperature operation.Ultra-low field magnetometers are essential components for a wide range of practical applications including geology, mineral exploration, archaeology, defence and medicine [1]. The field is dominated by superconducting quantum interference devices (SQUIDs) operating at cryogenic temperatures [2]. Magnetometers capable of room temperature operation offer significant advantages both in terms of operational costs and range of applications. The state-of-the-art are magnetostrictive magnetometers with sensitivities in the range of fT Hz −1/2 [3, 4], and atomic magnetometers which achieve impressive sensitivities as low as 160 aT Hz −1/2 [5] but with limited dynamic range due to the nonlinear Zeeman effect [2,6]. Recently, significant effort has been made to miniaturize room temperature magnetometers. However both atomic and magnetostrictive magnetometers remain generally limited to millimeter or centimeter size scales. Smaller microscale magnetometers have many potential applications in biology, medicine, and condensed matter physics [7,8]. A particularly important application is magnetic resonance imaging, where by placing the magnetometer in close proximity to the sample both sensitivity and resolution may be enhanced [9], potentially enabling detection of nuclear spin noise [10], imaging of neural networks [7], and advances in areas of medicine such as magneto-cardiography[1, 6] and magneto-encephalography [11].In the past few years, rapid progress has been achieved on NV center based magnetometers. They combine sensitivities as low as 4 nT Hz −1/2 with room temperature operation, optical readout and nanoscale size [12] and are predicted theoretically to reach the fT Hz −1/2 range [13]. This has allowed three-dimensional magnetic field imaging at the micro scale using ensembles of NV-centers [7], and magnetic resonance [14] and field imaging[13] at the nanoscale using single NV centers. In spite of these extraordinary achievements applications are hampered by fabrication issues and the intricacy of the read-out schemes [15]. Furthermore miniaturization is limitied by the bulky read-out optics, the magnetic field coils for state preparation and the microwave excitation device [7].In this letter we present the concept of a cavity optomechanical field sensor which combines room temperature operation and high sensitivity with large dynamic range and small size. The sensor leverages results from the emergent field of cavity optomechanics where ultra-sensitive force and positi...

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Cavity Optomechanical Magnetometer

et al. 2012

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“…Very recently, lasing in such cavities incorporating multi-quantum well material has been demonstrated [15]. Because of their small footprint, such 1D PC cavities also have potential as compact light sources for on-chip optical communications, and proposals for employing nanomechanical properties of such structures to build tunable lasers have been made [16]. Much like two dimensional PC cavities, nanobeam cavities have high Q and low V m , thereby greatly decreasing the lasing threshold via the Purcell enhancement of spontaneous emission rate.…”

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Nanobeam photonic crystal cavity quantum dot laser

Gong¹,

Ellis²,

Shambat³

et al. 2010

Opt. Express

105

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The lasing behavior of one dimensional GaAs nanobeam cavities with embedded InAs quantum dots is studied at room temperature. Lasing is observed throughout the quantum dot PL spectrum, and the wavelength dependence of the threshold is calculated. We study the cavity lasers under both 780 nm and 980 nm pump, finding thresholds as low as 0.3 microW and 19 microW for the two pump wavelengths, respectively. Finally, the nanobeam cavity laser wavelengths are tuned by up to 7 nm by employing a fiber taper in near proximity to the cavities. The fiber taper is used both to efficiently pump the cavity and collect the cavity emission.

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“…Accessing a regime in which radiation pressure becomes significant, either from an external laser source or the internal laser field itself, opens up several new possibilities for all-optical laser wavelength tuning and locking. 11,16 This work was supported by the DARPA NACHOS program ͑Award No. W911NF-07-1-0277͒.…”

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Electrostatically tunable optomechanical “zipper” cavity laser

Perahia

Cohen

Meenehan

et al. 2010

Applied Physics Letters

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A tunable nanoscale "zipper" laser cavity, formed from two doubly clamped photonic crystal nanobeams, is demonstrated. Pulsed, room temperature, optically pumped lasing action at = 1.3 m is observed for cavities formed in a thin membrane containing InAsP/GaInAsP quantum-wells. Metal electrodes are deposited on the ends of the nanobeams to allow for microelectromechanical actuation. Electrostatic tuning over a range of ⌬ = 20 nm for an applied voltage amplitude of 9 V and modulation at a frequency as high as m = 6.7 MHz of the laser wavelength is demonstrated.

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Optomechanical zipper cavity lasers: theoretical analysis of tuning range and stability

Cited by 24 publications

References 40 publications

Cavity Optomechanical Magnetometer

Cavity Optomechanical Magnetometer

Nanobeam photonic crystal cavity quantum dot laser

Electrostatically tunable optomechanical “zipper” cavity laser

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