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We demonstrate optical cycling and sub-Doppler laser cooling of a cryogenic buffer-gas beam of calcium monohydride (CaH) molecules. We measure vibrational branching ratios for laser cooling transitions for both excited electronic states A…

Atomic Physics · Physics 2022-08-24 S. F. Vázquez-Carson , Q. Sun , J. Dai , D. Mitra , T. Zelevinsky

Laser-cooled atoms that are trapped and optically interfaced with light in nanophotonic waveguides are a powerful platform for fundamental research in quantum optics as well as for applications in quantum communication and quantum…

Quantum Physics · Physics 2019-11-20 Daniel Hümmer , Philipp Schneeweiss , Arno Rauschenbeutel , Oriol Romero-Isart

Laser cooling of matter through anti-Stokes photoluminescence, where the emitted frequency of light exceeds that of the impinging laser by virtue of absorption of thermal vibrational energy, has been successfully realized in condensed…

Mesoscale and Nanoscale Physics · Physics 2021-01-14 Manuchehr Ebrahimi , Wei Sun , Amr S. Helmy , Nazir P. Kherani

The general idea that optical radiation may cool matter was put forward by Pringsheim already in 1929. Doppler cooling of dilute atomic gases is an extremely successful application of this concept, and more recently anti-Stokes cooling in…

Quantum Gases · Physics 2015-05-13 Ulrich Vogl , Martin Weitz

This paper discusses a quantum optical heating mechanism which might play an important role in sonoluminescence experiments. We suggest that this mechanism occurs during the final stages of the bubble collapse phase and accompanies the…

Quantum Physics · Physics 2012-07-31 Almut Beige , Antonio Capolupo , Andreas Kurcz

The term `laser cooling' is applied to the use of optical means to cool the motional energies of either atoms and molecules, or micromirrors. In the literature, these two strands are kept largely separate; both, however suffer from severe…

Optics · Physics 2018-06-05 André Xuereb

Trapping and optically interfacing laser-cooled neutral atoms is an essential requirement for their use in advanced quantum technologies. Here we simultaneously realize both of these tasks with cesium atoms interacting with a multi-color…

Quantum Physics · Physics 2010-06-03 E. Vetsch , D. Reitz , G. Sagué , R. Schmidt , S. T. Dawkins , A. Rauschenbeutel

Photothermal heating represents a major constraint that limits the performance of many nanoscale optoelectronic and optomechanical devices including nanolasers, quantum optomechanical resonators, and integrated photonic circuits. Although…

Applied Physics · Physics 2020-07-15 Anupum Pant , Xiaojing Xia , E. James Davis , Peter J. Pauzauskie

We systematically investigate the dependence of the temperature of cold cesium atoms of polarization gradient cooling (PGC) in optical molasses on experimental parameters, which contain changing modes of cooling laser, PGC interaction time,…

Atomic Physics · Physics 2015-03-23 Zhonghua Ji , Jinpeng Yuan , Yanting Zhao , Xuefang Chang , Yonggang Yang , Liantuan Xiao , Suotang Jia

Refrigeration of a solid-state system with light has potential applications for cooling small-scale electronics and photonics. We show theoretically that two coupled semiconductor quantum wells are efficient cooling media for optical…

Mesoscale and Nanoscale Physics · Physics 2015-10-28 R. S. Daveau , P. Tighineanu , P. Lodahl , S. Stobbe

We demonstrate the ability to load, cool and detect singly-charged calcium ions in a surface electrode trap using only visible and infrared lasers for the trapped-ion control. As opposed to the standard methods of cooling using…

Atomic Physics · Physics 2017-07-27 F. Lindenfelser , M. Marinelli , V. Negnevitsky , S. Ragg , J. P. Home

We present a theoretical analysis of a novel scheme for optical cooling of particles that does not in principle require a closed optical transition. A tightly confined laser beam interacting with a trapped particle experiences a phase…

Quantum Physics · Physics 2010-08-23 Peter Horak , André Xuereb , Tim Freegarde

We demonstrate that a Kalman filter applied to estimate the position of an optically levitated nanoparticle, and operated in real-time within a Field Programmable Gate Array (FPGA), is sufficient to perform closed-loop parametric feedback…

Quantum Physics · Physics 2018-04-16 Ashley Setter , Marko Toroš , Jason F. Ralph , Hendrik Ulbricht

Calcium monofluoride (CaF) molecules are loaded into an optical dipole trap (ODT) and subsequently laser cooled within the trap. Starting with magneto-optical trapping, we sub-Doppler cool CaF and then load $150(30)$ CaF molecules into an…

Some practical improvements are proposed for the "optical-shaker" laser-cooling technique [I.S. Averbukh and Y. Prior, Phys. Rev. Lett. 94, 153002 (2005)]. The improved technique results in an increased cooling rate and decreases the…

Atomic Physics · Physics 2009-01-14 Louis Marmet

We present an opto-electrical cooling scheme for polar molecules based on a Sisyphus-type cooling cycle in suitably tailored electric trapping fields. Dissipation is provided by spontaneous vibrational decay in a closed level scheme found…

Quantum Physics · Physics 2009-10-07 M. Zeppenfeld , M. Motsch , P. W. H. Pinkse , G. Rempe

We propose a novel scheme of photon upconversion based on harnessing the energy of plasmonic hot carriers. Low-energy photons excite hot electrons and hot holes in a plasmonic nanoparticle, which are then injected into an adjacent…

Optics · Physics 2015-11-17 Gururaj V. Naik , Jennifer A. Dionne

We simultaneously trap ultracold lithium and cesium atoms in an optical dipole trap formed by the focus of a CO$_2$ laser and study the exchange of thermal energy between the gases. The cesium gas, which is optically cooled to $20 \mu$K,…

Atomic Physics · Physics 2009-11-07 M. Mudrich , S. Kraft , K. Singer , R. Grimm , A. Mosk , M. Weidemuller

Optical tweezers, the three-dimensional confinement of a nanoparticle by a strongly focused beam of light, have been widely employed in investigating biomaterial nanomechanics, nanoscopic fluid properties, and ultrasensitive detections in…

Photonic nanocavities are a key component in many applications because of their capability of trapping and storing photons and enhancing interactions of light with various functional materials and structures. The maximal number of photons…

Optics · Physics 2013-03-15 Xiankai Sun , Xufeng Zhang , Carsten Schuck , Hong X. Tang