Zobrazeno 1 - 10
of 101
pro vyhledávání: '"Knittel, Joachim"'
Autor:
Taylor, Michael A., Janousek, Jiri, Daria, Vincent, Knittel, Joachim, Hage, Boris, Bachor, Hans-A., Bowen, Warwick P.
We demonstrate the first biological measurement with precision surpassing the quantum noise limit. Lipid particles within a living yeast cell are tracked with sub-shot noise sensitivity, thereby revealing the biological dynamics of the cellular cytop
Externí odkaz:
http://arxiv.org/abs/2105.09478
Autor:
Forstner, Stefan, Sheridan, Eoin, Knittel, Joachim, Humphreys, Christopher L., Brawley, George A., Rubinsztein-Dunlop, Halina, Bowen, Warwick P.
Publikováno v:
Adv Mat 26 (2014) 6348
Recent advances in optical magnetometry have achieved record sensitivity at both macro- and nano-scale. Combined with high bandwidth and non-cryogenic operation, this has enabled many applications. By comparison, microscale optical magnetometers have
Externí odkaz:
http://arxiv.org/abs/2104.05179
A nanofiber-based optical tweezer is demonstrated. Trapping is achieved by combining attractive near-field optical gradient forces with repulsive electrostatic forces. Silica-coated Fe$_2$O$_3$ nanospheres of 300 diameter are trapped as close as 50 n
Externí odkaz:
http://arxiv.org/abs/1310.5894
Whispering gallery mode biosensors allow selective unlabelled detection of single proteins and, combined with quantum limited sensitivity, the possibility for noninvasive realtime observation of motor molecule motion. However, to date technical noise
Externí odkaz:
http://arxiv.org/abs/1308.1777
Autor:
Taylor, Michael A., Janousek, Jiri, Daria, Vincent, Knittel, Joachim, Hage, Boris, Bachor, Hans-A., Bowen, Warwick P.
Publikováno v:
Phys. Rev. X 4, 011017 (2014)
We report both sub-diffraction-limited quantum metrology and quantum enhanced spatial resolution for the first time in a biological context. Nanoparticles are tracked with quantum correlated light as they diffuse through an extended region of a livin
Externí odkaz:
http://arxiv.org/abs/1305.1353
We detect 39 nm x 10 nm gold nanorods using a microtoroid stabilized via the Pound-Drever-Hall method. Real-time detection is achieved with signal-to-noise ratios up to 12.2. These nanoparticles are a factor of three smaller in volume than any other
Externí odkaz:
http://arxiv.org/abs/1303.1174
Publikováno v:
Optics Express, Vol. 21, Issue 7, pp. 8018-8024 (2013)
We demonstrate a lock-in particle tracking scheme in optical tweezers based on stroboscopic modulation of an illuminating optical field. This scheme is found to evade low frequency noise sources while otherwise producing an equivalent position measur
Externí odkaz:
http://arxiv.org/abs/1301.5975
Publikováno v:
New Journal of Physics 15 023018 (2013)
A general quantum limit to the sensitivity of particle position measurements is derived following the simple principle of the Heisenberg microscope. The value of this limit is calculated for particles in the Rayleigh and Mie scattering regimes, and w
Externí odkaz:
http://arxiv.org/abs/1208.0657
The intracavity power, and hence sensitivity, of optomechanical sensors is commonly limited by parametric instability. Here we characterize the parametric instability induced sensitivity degradation in a micron scale cavity optomechanical system. Fee
Externí odkaz:
http://arxiv.org/abs/1109.2381
Autor:
Taylor, Michael A., Szorkovszky, Alex, Knittel, Joachim, Lee, Kwan H., McRae, Terry G., Bowen, Warwick P.
Publikováno v:
Optics Express, Vol. 20, Issue 12, pp. 12742-12751 (2012)
Cavity optoelectromechanical regenerative amplification is demonstrated. An optical cavity enhances mechanical transduction, allowing sensitive measurement even for heavy oscillators. A 27.3 MHz mechanical mode of a microtoroid was linewidth narrowed
Externí odkaz:
http://arxiv.org/abs/1107.0779