1
|
Segura-Sanchis E, Moreno A, Ramiro-Manzano F, Fenollosa R, Feliz M, Atienzar P. Optoelectronic properties of octahedral molybdenum cluster-based materials at a single crystal level. Dalton Trans 2023; 52:17818-17825. [PMID: 37971064 DOI: 10.1039/d3dt02501b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2023]
Abstract
Octahedral molybdenum (Mo6) clusters constitute suitable building blocks for the design of promising single crystal materials in the field of optoelectronics. Here, we prepared single crystals composed of hydroxo Mo6X8 (X = Br, Cl) cluster complexes interconnected by H-bonding interactions with water molecules and protons. The optoelectronic responses and the absorption and emission spectra of these cluster-based single crystals were acquired upon light irradiation, and they show dependency on the nature of the halogens, with the brominated cluster being the most conductive. A fast photoelectrical response was recorded and it showed remarkable stability after multiple illumination on/off cycles. The results obtained provide relevant information for the development of photonic and optoelectronic devices, sensors and photocatalysts.
Collapse
Affiliation(s)
- Elena Segura-Sanchis
- Instituto de Tecnología Química, Universitat Politècnica de València - Consejo Superior de Investigaciones Científicas (UPV-CSIC), Avd. de los Naranjos s/n, 46022 Valencia, Spain.
| | - Ana Moreno
- Instituto de Tecnología Química, Universitat Politècnica de València - Consejo Superior de Investigaciones Científicas (UPV-CSIC), Avd. de los Naranjos s/n, 46022 Valencia, Spain.
| | - Fernando Ramiro-Manzano
- Instituto de Tecnología Química, Universitat Politècnica de València - Consejo Superior de Investigaciones Científicas (UPV-CSIC), Avd. de los Naranjos s/n, 46022 Valencia, Spain.
| | - Roberto Fenollosa
- Instituto de Tecnología Química, Universitat Politècnica de València - Consejo Superior de Investigaciones Científicas (UPV-CSIC), Avd. de los Naranjos s/n, 46022 Valencia, Spain.
| | - Marta Feliz
- Instituto de Tecnología Química, Universitat Politècnica de València - Consejo Superior de Investigaciones Científicas (UPV-CSIC), Avd. de los Naranjos s/n, 46022 Valencia, Spain.
| | - Pedro Atienzar
- Instituto de Tecnología Química, Universitat Politècnica de València - Consejo Superior de Investigaciones Científicas (UPV-CSIC), Avd. de los Naranjos s/n, 46022 Valencia, Spain.
| |
Collapse
|
2
|
Segura-Sanchis E, García-Aboal R, Fenollosa R, Ramiro-Manzano F, Atienzar P. Scanning Photocurrent Microscopy in Single Crystal Multidimensional Hybrid Lead Bromide Perovskites. Nanomaterials (Basel) 2023; 13:2570. [PMID: 37764599 PMCID: PMC10535732 DOI: 10.3390/nano13182570] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Revised: 09/08/2023] [Accepted: 09/12/2023] [Indexed: 09/29/2023]
Abstract
We investigated solution-grown single crystals of multidimensional 2D-3D hybrid lead bromide perovskites using spatially resolved photocurrent and photoluminescence. Scanning photocurrent microscopy (SPCM) measurements where the electrodes consisted of a dip probe contact and a back contact. The crystals revealed significant differences between 3D and multidimensional 2D-3D perovskites under biased detection, not only in terms of photocarrier decay length values but also in the spatial dynamics across the crystal. In general, the photocurrent maps indicate that the closer the border proximity, the shorter the effective decay length, thus suggesting a determinant role of the border recombination centers in monocrystalline samples. In this case, multidimensional 2D-3D perovskites exhibited a simple fitting model consisting of a single exponential, while 3D perovskites demonstrated two distinct charge carrier migration dynamics within the crystal: fast and slow. Although the first one matches that of the 2D-3D perovskite, the long decay of the 3D sample exhibits a value two orders of magnitude larger. This difference could be attributed to the presence of interlayer screening and a larger exciton binding energy of the multidimensional 2D-3D perovskites with respect to their 3D counterparts.
Collapse
Affiliation(s)
| | | | | | - Fernando Ramiro-Manzano
- Instituto de Tecnología Química, Consejo Superior de Investigaciones Científicas, Universitat Politècnica de València, Avenida de los Naranjos s/n, 46022 Valencia, Spain; (E.S.-S.); (R.G.-A.); (R.F.)
| | - Pedro Atienzar
- Instituto de Tecnología Química, Consejo Superior de Investigaciones Científicas, Universitat Politècnica de València, Avenida de los Naranjos s/n, 46022 Valencia, Spain; (E.S.-S.); (R.G.-A.); (R.F.)
| |
Collapse
|
3
|
Ramiro-Manzano F, García-Aboal R, Fenollosa R, Biasi S, Rodriguez I, Atienzar P, Meseguer F. Optical properties of organic/inorganic perovskite microcrystals through the characterization of Fabry–Pérot resonances. Dalton Trans 2020; 49:12798-12804. [DOI: 10.1039/d0dt02254c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Fabry-Pérot oscillations modulating the optical transmission and photoluminiscence spectra of hybrid perovskite microcrystals have been characterized. The simultaneous fit of both spectra to theoretical models permits to determine optical properties.
Collapse
Affiliation(s)
- Fernando Ramiro-Manzano
- Instituto de Tecnología Química (CSIC-UPV)
- Universitat Politécnica de Valéncia
- 46022 Valencia
- Spain
| | - Rocío García-Aboal
- Instituto de Tecnología Química (CSIC-UPV)
- Universitat Politécnica de Valéncia
- 46022 Valencia
- Spain
| | - Roberto Fenollosa
- Instituto de Tecnología Química (CSIC-UPV)
- Universitat Politécnica de Valéncia
- 46022 Valencia
- Spain
| | - Stefano Biasi
- Laboratorio di Nanoscienze
- Dipartimento di Fisica
- University of Trento
- 38123 Povo
- Italy
| | - Isabelle Rodriguez
- Instituto de Tecnología Química (CSIC-UPV)
- Universitat Politécnica de Valéncia
- 46022 Valencia
- Spain
| | - Pedro Atienzar
- Instituto de Tecnología Química (CSIC-UPV)
- Universitat Politécnica de Valéncia
- 46022 Valencia
- Spain
| | - Francisco Meseguer
- Instituto de Tecnología Química (CSIC-UPV)
- Universitat Politécnica de Valéncia
- 46022 Valencia
- Spain
| |
Collapse
|
4
|
García-Aboal R, Fenollosa R, Ramiro-Manzano F, Rodríguez I, Meseguer F, Atienzar P. Single Crystal Growth of Hybrid Lead Bromide Perovskites Using a Spin-Coating Method. ACS Omega 2018; 3:5229-5236. [PMID: 31458736 PMCID: PMC6641975 DOI: 10.1021/acsomega.8b00447] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/09/2018] [Accepted: 04/19/2018] [Indexed: 06/10/2023]
Abstract
Synthesis and studies of single crystals of hybrid perovskite are important for achieving a better understanding of the optoelectronic phenomena occurring in this material and for improving ongoing applications. Here, we report on the growth of micrometer-size single crystals of methylammonium lead bromide (MAPbBr3) using the spin coating deposition method on a quartz substrate. We studied the influence of the rotation speed and the use of three different additives N-cyclohexyl-2-pyrrolidone, dimethyl sulfoxide, and 4-tert-butylpyridine on the crystal size and shape. The introduction of an additive in the precursor solution is revealed to be very useful for obtaining crystals with well-defined geometries and for decreasing the amount of defects. In this way, high-quality single crystals that sustain optical resonating modes were obtained and characterized by transmittance and photoluminescence measurements.
Collapse
Affiliation(s)
- Rocío García-Aboal
- Instituto Universitario de
Tecnologia Química, CSIC-UPV, Universitat
Politècnica de València, Av. de los Naranjos, Valencia 46022, Spain
| | - Roberto Fenollosa
- Instituto Universitario de
Tecnologia Química, CSIC-UPV, Universitat
Politècnica de València, Av. de los Naranjos, Valencia 46022, Spain
| | - Fernando Ramiro-Manzano
- Instituto Universitario de
Tecnologia Química, CSIC-UPV, Universitat
Politècnica de València, Av. de los Naranjos, Valencia 46022, Spain
| | - Isabelle Rodríguez
- Instituto Universitario de
Tecnologia Química, CSIC-UPV, Universitat
Politècnica de València, Av. de los Naranjos, Valencia 46022, Spain
| | - Francisco Meseguer
- Instituto Universitario de
Tecnologia Química, CSIC-UPV, Universitat
Politècnica de València, Av. de los Naranjos, Valencia 46022, Spain
| | - Pedro Atienzar
- Instituto Universitario de
Tecnologia Química, CSIC-UPV, Universitat
Politècnica de València, Av. de los Naranjos, Valencia 46022, Spain
| |
Collapse
|
5
|
Abstract
Silicon microspheres produced in gas-phase by hot-wall CVD offer unique quality in terms of sphericity, surface smoothness, and size. However, the spheres produced are polydisperse in size, which typically range from 0.5 μm to 5 μm. In this work we show through experiments and calculations that thermophoretic forces arising from strong temperature gradients inside the reactor volume effectively sort the particles in size along the reactor. These temperature gradients are shown to be produced by a convective gas flow. The results prove that it is possible to select the particle size by collecting them in a particular reactor region, opening new possibilities towards the production by CVD of size-controlled high-quality silicon microspheres.
Collapse
Affiliation(s)
- M Garín
- Grup de recerca en Micro i Nanotecnologies, Departament d'Enginyeria Electrònica, Universitat Politècnica de Catalunya, c/Jordi Girona Pascual 1-3, Barcelona 08034, Spain
| | - R Fenollosa
- Instituto de Tecnología Química (CSIC - UPV), Universitat Politècnica de Valencia, Av. Tarongers s/n 46022, Valencia, Spain
| | - L Kowalski
- Grup de recerca en Micro i Nanotecnologies, Departament d'Enginyeria Electrònica, Universitat Politècnica de Catalunya, c/Jordi Girona Pascual 1-3, Barcelona 08034, Spain
| |
Collapse
|
6
|
Fenollosa R, Garcia-Rico E, Alvarez S, Alvarez R, Yu X, Rodriguez I, Carregal-Romero S, Villanueva C, Garcia-Algar M, Rivera-Gil P, de Lera AR, Parak WJ, Meseguer F, Alvarez-Puebla RA. Silicon particles as trojan horses for potential cancer therapy. J Nanobiotechnology 2014; 12:35. [PMID: 25223512 PMCID: PMC4428529 DOI: 10.1186/s12951-014-0035-7] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2014] [Accepted: 09/03/2014] [Indexed: 01/03/2023] Open
Abstract
BACKGROUND Porous silicon particles (PSiPs) have been used extensively as drug delivery systems, loaded with chemical species for disease treatment. It is well known from silicon producers that silicon is characterized by a low reduction potential, which in the case of PSiPs promotes explosive oxidation reactions with energy yields exceeding that of trinitrotoluene (TNT). The functionalization of the silica layer with sugars prevents its solubilization, while further functionalization with an appropriate antibody enables increased bioaccumulation inside selected cells. RESULTS We present here an immunotherapy approach for potential cancer treatment. Our platform comprises the use of engineered silicon particles conjugated with a selective antibody. The conceptual advantage of our system is that after reaction, the particles are degraded into soluble and excretable biocomponents. CONCLUSIONS In our study, we demonstrate in particular, specific targeting and destruction of cancer cells in vitro. The fact that the LD50 value of PSiPs-HER-2 for tumor cells was 15-fold lower than the LD50 value for control cells demonstrates very high in vitro specificity. This is the first important step on a long road towards the design and development of novel chemotherapeutic agents against cancer in general, and breast cancer in particular.
Collapse
Affiliation(s)
- Roberto Fenollosa
- Centro de Tecnologías Físicas, Unidad Asociada ICMM/CSIC-UPV, Universidad Politécnica de Valencia, Av. Los Naranjos s/n, Valencia, 46022 Spain and Instituto de Ciencia de Materiales de Madrid, CSIC, Madrid, 28049, Spain.
| | - Eduardo Garcia-Rico
- Servicio de Oncología, Hospital Universitario Madrid-Torrelodones, Madrid, 28250, Spain.
| | - Susana Alvarez
- Departamento de Química Orgánica, Universidade de Vigo, Vigo, 36310, Spain.
| | - Rosana Alvarez
- Departamento de Química Orgánica, Universidade de Vigo, Vigo, 36310, Spain.
| | - Xiang Yu
- Fachbereich Physik, Philipps Universität Marburg, Marburg, 35037, Germany.
| | - Isabel Rodriguez
- Centro de Tecnologías Físicas, Unidad Asociada ICMM/CSIC-UPV, Universidad Politécnica de Valencia, Av. Los Naranjos s/n, Valencia, 46022 Spain and Instituto de Ciencia de Materiales de Madrid, CSIC, Madrid, 28049, Spain.
| | | | - Carlos Villanueva
- Medcomtech SA, C/ Catalunya, 83-85 Viladecans, Barcelona, 08840, Spain.
| | - Manuel Garcia-Algar
- Departamento de Química Física e Inorgánica, Universitat Rovira i Virgili and Centro de Tecnología Química de Catalunya, Carrer de Marcel•lí Domingo s/n, 43007, Tarragona, Spain.
| | - Pilar Rivera-Gil
- Medcomtech SA, C/ Catalunya, 83-85 Viladecans, Barcelona, 08840, Spain.
| | - Angel R de Lera
- Departamento de Química Orgánica, Universidade de Vigo, Vigo, 36310, Spain.
| | - Wolfgang J Parak
- Fachbereich Physik, Philipps Universität Marburg, Marburg, 35037, Germany.
| | - Francisco Meseguer
- Centro de Tecnologías Físicas, Unidad Asociada ICMM/CSIC-UPV, Universidad Politécnica de Valencia, Av. Los Naranjos s/n, Valencia, 46022 Spain and Instituto de Ciencia de Materiales de Madrid, CSIC, Madrid, 28049, Spain.
| | - Ramón A Alvarez-Puebla
- Departamento de Química Física e Inorgánica, Universitat Rovira i Virgili and Centro de Tecnología Química de Catalunya, Carrer de Marcel•lí Domingo s/n, 43007, Tarragona, Spain. .,ICREA, Passeig Lluís Companys 23, 08010, Barcelona, Spain.
| |
Collapse
|
7
|
Abstract
Reflection in a mirror changes the handedness of the real world, and right-handed objects turn left-handed and vice versa (M. Gardner, The Ambidextrous Universe, Penguin Books, 1964). Also, we learn from electromagnetism textbooks that a flat metallic mirror transforms an electric charge into a virtual opposite charge. Consequently, the mirror image of a magnet is another parallel virtual magnet as the mirror image changes both the charge sign and the curl handedness. Here we report the dramatic modification in the optical response of a silicon nanocavity induced by the interaction with its image through a flat metallic mirror. The system of real and virtual dipoles can be interpreted as an effective magnetic dipole responsible for a strong enhancement of the cavity scattering cross section.
Collapse
Affiliation(s)
- Elisabet Xifré-Pérez
- Institut de Ciencies Fotoniques (ICFO), Mediterranean Technology Park, 08860 Castelldefels, Barcelona, Spain
| | | | | | | | | | | | | |
Collapse
|
8
|
Shi L, Tuzer TU, Fenollosa R, Meseguer F. A new dielectric metamaterial building block with a strong magnetic response in the sub-1.5-micrometer region: silicon colloid nanocavities. Adv Mater 2012; 24:5934-5938. [PMID: 22927242 DOI: 10.1002/adma.201201987] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2012] [Revised: 07/15/2012] [Indexed: 06/01/2023]
Abstract
A new dielectric metamaterial building block based on high refractive index silicon spherical nanocavities with Mie resonances appearing in the near infrared optical region is prepared and characterized. It is demonstrated both experimentally and theoretically that a single silicon nanocavity supports well-defined and robust magnetic resonances, even in a liquid medium environment, at wavelength values up to six times larger than the cavity radius.
Collapse
Affiliation(s)
- Lei Shi
- Centro de Tecnologias Fisicas, Unidad Asociada ICMM/CSIC-UPV, Universidad Politecnica de Valencia, Av. Los Naranjos s/n, Valencia, 46022, Spain Instituto de Ciencia de Materiales de Madrid CSIC, Madrid, 28049, Spain.
| | | | | | | |
Collapse
|
9
|
Ramiro-Manzano F, Fenollosa R, Xifré-Pérez E, Garín M, Meseguer F. Porous silicon microcavities: synthesis, characterization, and application to photonic barcode devices. Nanoscale Res Lett 2012; 7:497. [PMID: 22943136 PMCID: PMC3499175 DOI: 10.1186/1556-276x-7-497] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/15/2012] [Accepted: 06/18/2012] [Indexed: 06/01/2023]
Abstract
We have recently developed a new type of porous silicon we name as porous silicon colloids. They consist of almost perfect spherical silicon nanoparticles with a very smooth surface, able to scatter (and also trap) light very efficiently in a large-span frequency range. Porous silicon colloids have unique properties because of the following: (a) they behave as optical microcavities with a high refractive index, and (b) the intrinsic photoluminescence (PL) emission is coupled to the optical modes of the microcavity resulting in a unique luminescence spectrum profile. The PL spectrum constitutes an optical fingerprint identifying each particle, with application for biosensing.In this paper, we review the synthesis of silicon colloids for developing porous nanoparticles. We also report on the optical properties with special emphasis in the PL emission of porous silicon microcavities. Finally, we present the photonic barcode concept.
Collapse
Affiliation(s)
- Fernando Ramiro-Manzano
- Centro de Tecnologías Físicas, Unidad Asociada ICMM/CSIC-UPV, Universidad Politécnica de Valencia, Av. Los Naranjos s/n, Valencia, 46022, Spain
- Instituto de Ciencia de Materiales de Madrid CSIC, Madrid, 28049, Spain
| | - Roberto Fenollosa
- Centro de Tecnologías Físicas, Unidad Asociada ICMM/CSIC-UPV, Universidad Politécnica de Valencia, Av. Los Naranjos s/n, Valencia, 46022, Spain
- Instituto de Ciencia de Materiales de Madrid CSIC, Madrid, 28049, Spain
| | - Elisabet Xifré-Pérez
- Centro de Tecnologías Físicas, Unidad Asociada ICMM/CSIC-UPV, Universidad Politécnica de Valencia, Av. Los Naranjos s/n, Valencia, 46022, Spain
- Instituto de Ciencia de Materiales de Madrid CSIC, Madrid, 28049, Spain
| | - Moises Garín
- Centro de Tecnologías Físicas, Unidad Asociada ICMM/CSIC-UPV, Universidad Politécnica de Valencia, Av. Los Naranjos s/n, Valencia, 46022, Spain
- Instituto de Ciencia de Materiales de Madrid CSIC, Madrid, 28049, Spain
| | - Francisco Meseguer
- Centro de Tecnologías Físicas, Unidad Asociada ICMM/CSIC-UPV, Universidad Politécnica de Valencia, Av. Los Naranjos s/n, Valencia, 46022, Spain
- Instituto de Ciencia de Materiales de Madrid CSIC, Madrid, 28049, Spain
| |
Collapse
|
10
|
Ramiro-Manzano F, Fenollosa R, Xifré-Pérez E, Garín M, Meseguer F. Porous silicon microcavities based photonic barcodes. Adv Mater 2011; 23:3022-5. [PMID: 21538596 DOI: 10.1002/adma.201100986] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2011] [Indexed: 05/20/2023]
Affiliation(s)
- F Ramiro-Manzano
- Centro de Tecnologías Físicas, Unidad Asociada ICMM/CSIC-UPV, Universidad Politécnica de Valencia, Spain
| | | | | | | | | |
Collapse
|
11
|
Abstract
Silicon colloids based microcavities, with sphere size between 1 and 3 micrometers, have been synthesized and optically characterized. Due to both the small cavity volume and the high refractive index of silicon we are able to tune resonances with extremely low mode index, whose electric field distribution resembles those of electronic orbitals. The value of some parameters such as quality factor Q, effective mode volume, and evanescent field have been calculated for several modes. This calculation indicates silicon colloids can be a serious strategy for developing optical microcavities where may coexist both optical modes with large evanescent fields useful for sensing applications, as well as modes with high Q/V ratio values, of the order of 10(9)(λ/n)(-3).
Collapse
Affiliation(s)
- E Xifré-Pérez
- Centro de Tecnologías Físicas, Unidad Asociada CSIC-UPV, Universidad Politécnica de Valencia, Avda Tarongers s/n, 46022, Valencia, Spain
| | | | | |
Collapse
|
12
|
Xifré-Pérez E, Domenech JD, Fenollosa R, Muñoz P, Capmany J, Meseguer F. All silicon waveguide spherical microcavity coupler device. Opt Express 2011; 19:3185-3192. [PMID: 21369140 DOI: 10.1364/oe.19.003185] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
A coupler based on silicon spherical microcavities coupled to silicon waveguides for telecom wavelengths is presented. The light scattered by the microcavity is detected and analyzed as a function of the wavelength. The transmittance signal through the waveguide is strongly attenuated (up to 25 dB) at wavelengths corresponding to the Mie resonances of the microcavity. The coupling between the microcavity and the waveguide is experimentally demonstrated and theoretically modeled with the help of FDTD calculations.
Collapse
Affiliation(s)
- E Xifré-Pérez
- Centro de Tecnologías Físicas, Unidad Asociada CSIC-UPV, Universidad Politécnica de Valencia, Avda Tarongers s/n, 46022, Valencia, Spain
| | | | | | | | | | | |
Collapse
|
13
|
Fenollosa R, Ramiro-Manzano F, Tymczenko M, Meseguer F. Porous silicon microspheres: synthesis, characterization and application to photonic microcavities. ACTA ACUST UNITED AC 2010. [DOI: 10.1039/c0jm00079e] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
14
|
Xifré-Pérez E, García de Abajo FJ, Fenollosa R, Meseguer F. Photonic binding in silicon-colloid microcavities. Phys Rev Lett 2009; 103:103902. [PMID: 19792311 DOI: 10.1103/physrevlett.103.103902] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2009] [Revised: 07/21/2009] [Indexed: 05/28/2023]
Abstract
Photonic binding between two identical silicon-colloid-based microcavities is studied by using a generalized multipolar expansion. In contrast with previous works, we focus on low-order cavity modes that resemble low-energy electronic orbitals. For conservative light intensities, the interaction between cavity modes with moderate Q factors produces extremely large particle acceleration values. Optical forces dominate over van der Waals, gravity, and Brownian motion, and they show a binding-antibinding behavior in analogy to electronic binding. As these photonic forces are associated with relatively broad Mie mode resonances and they are not strongly influenced by sample absorption, our study opens a plausible avenue towards manipulation of high-refractive-index colloidal assemblies.
Collapse
Affiliation(s)
- E Xifré-Pérez
- Centro de Tecnologías Físicas, Unidad Asociada ICMM- CSIC/UPV, Universidad Politécnica de Valencia, 46022 Valencia, Spain
| | | | | | | |
Collapse
|
15
|
|
16
|
|