Topic
Optical microcavity
About: Optical microcavity is a research topic. Over the lifetime, 2599 publications have been published within this topic receiving 72125 citations. The topic is also known as: optical microcavities.
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TL;DR: In this paper, high differential efficiency quantum dot microcavity light emitting diodes were used to reduce carrier diffusion in small oxide-apertured micro-cavities.
Abstract: Data are presented on high differential efficiency quantum dot microcavity light emitting diodes. The data show that differential efficiencies >16% can be achieved by the use of quantum dots to reduce carrier diffusion in small oxide-apertured microcavities. The measured efficiencies are sensitive to both microcavity tuning of the resonance peak to the quantum dot light emitters, and nonradiative recombination effects brought on by temperature, bias current, and edge effects. The peak efficiencies are obtained at a resonance temperature of ∼160 K.
19 citations
Patent•
17 May 2010TL;DR: In this paper, a quantum dot thin film solar cell is provided, which at least includes a first electrode layer, an optical active layer, and a second electrode layer sequentially deposited on a substrate.
Abstract: A quantum dot thin film solar cell is provided, which at least includes a first electrode layer, an optical active layer, and a second electrode layer sequentially deposited on a substrate. A plurality of quantum dots is formed in the optical active layer. Since the plurality of quantum dots and the optical active layer are formed through co-sputtering, an interface adhesion between the plurality of quantum dots and the optical active layer is good in this quantum dot thin film solar cell.
19 citations
TL;DR: It is observed that the chirp characteristics are independent of the repetition rate of the laser up to 10 GHz, and the implementation of cavity electrodynamics effects increases the large signal modulation bandwidth significantly.
Abstract: We report on a series of experiments on the dynamics of spontaneous emission controlled nanolasers. The laser cavity is a photonic-crystal slab cavity, embedding self-assembled quantum dots as gain material. The implementation of cavity electrodynamics effects increases the large signal modulation bandwidth significantly, with measured modulation speeds of the order of 10 GHz while keeping an extinction ratio of 19 dB. A linear transient wavelength shift is reported, corresponding to a chirp of less than 100 pm for a 35 ps laser pulse. We observe that the chirp characteristics are independent of the repetition rate of the laser up to 10 GHz.
19 citations
TL;DR: In this paper, an optical microcavity formed between a metallic layer coated on the back of the cantilever and one coated at the end of an optical fiber was used to circumvent this problem.
Abstract: Bimaterial cantilevers have recently been used in, for example, the calorimetric analysis with picowatt resolution in microscopic space based on state-of-the-art atomic force microscopes. However, thermally induced effects usually change physical properties of the cantilevers, such as the resonance frequency, which reduce the accuracy of the measurements. Here, we propose an approach to circumvent this problem that uses an optical microcavity formed between a metallic layer coated on the back of the cantilever and one coated at the end of an optical fiber irradiating the cantilever. In addition to increasing the sensitivity, the optical rigidity of this system diminishes the thermally induced frequency shift. For a coating thickness of several tens of nanometers, the input power is 5–10 μW. These values can be evaluated from parameters derived by directly irradiating the cantilever in the absence of the microcavity. The system has the potential of using the cantilever both as a thermometer without frequency shifting and as a sensor with nanometer-controlled accuracy.
19 citations
TL;DR: In this paper, the binding event is optically transduced in the wavelength shift of the porous silicon optical microcavity (PSMC) reflectivity spectrum, and the hydrophobic interaction links the GlnBP, which acts as a molecular probe for Gln, to the hydrogenated porous silicon surface area.
Abstract: The molecular binding between the glutamine binding-protein (GlnBP) from Escherichia coli and L-glutamine (Gln) is detected by means of an optical biosensor based on porous silicon technology. The binding event is optically transduced in the wavelength shift of the porous silicon optical microcavity (PSMC) reflectivity spectrum. The hydrophobic interaction links the GlnBP, which acts as a molecular probe for Gln, to the hydrogenated porous silicon surface area. We can thus avoid any preliminary surface functionalization process. The protein infiltrated PSMC results stable to oxidation at least for few cycles of wet measurements. The penetration of the proteins into the pores of the porous silicon matrix has been optimized: a strong base post-etch process increases the pore size and removes any nanostructure on top and inside the porous silicon multilayer while does not degrade the optical response and the quality of the microcavity. (© 2006 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)
19 citations