Abstract: Light emitting devices can be disposed on the front side of a transparent backplane. A laser beam can be irradiated through the transparent backplane and onto a component located on the front side of the transparent backplane. In one embodiment, the component may be a solder material portion that is reflowed to bond the light emitting devices to the transparent backplane. In another embodiment, the component may be a solder material bonded to a defective bonded light emitting device. In this case, the laser irradiation can reflow the solder material to dissociate the defective bonded light emitting device from the transparent backplane. In yet another embodiment, the component may be a device component that is electrically modified by the laser irradiation.

Abstract: Selective transfer of dies including semiconductor devices to a target substrate can be performed employing local laser irradiation. Coining of at least one set of solder material portions can be employed to provide a planar surface-to-surface contact and to facilitate bonding of adjoining pairs of bond structures. Laser irradiation on the solder material portions can be employed to sequentially bond selected pairs of mated bonding structures, while preventing bonding of devices not to be transferred to the target substrate. Additional laser irradiation can be employed to selectively detach bonded devices, while not detaching devices that are not bonded to the target substrate. The transferred devices can be pressed against the target substrate during a second reflow process so that the top surfaces of the transferred devices can be coplanar. Wetting layers of different sizes can be employed to provide a trapezoidal vertical cross-sectional profile for reflowed solder material portions.

Abstract: A silicon-based photonic crystal includes a silicon substrate, a first dielectric with a grating structure formed therein, and a second dielectric with a higher index of refraction that covers at least a portion of the grating structure. The first dielectric can be formed on the silicon substrate, or a Fabry-Perot optical cavity can be formed between the silicon substrate and the first dielectric. An instrument can excite a fluorophore coupled to the photonic crystal by focusing collimated incident light that includes the fluorophore's excitation wavelength to a focal line on the surface of the photonic crystal such that the focal line is substantially parallel to the grating direction and can detect fluorescence radiation emitted by the fluorophore in response to the incident light. To provide for fluorescence enhancement, the excitation wavelength and/or emission wavelength of the fluorophore can couple to an optical resonance of the photonic crystal.

Abstract: A silicon-based photonic crystal includes a silicon substrate, a first dielectric with a grating structure formed therein, and a second dielectric with a higher index of refraction that covers at least a portion of the grating structure. The first dielectric can be formed on the silicon substrate, or a Fabry-Perot optical cavity can be formed between the silicon substrate and the first dielectric. An instrument can excite a fluorophore coupled to the photonic crystal by focusing collimated incident light that includes the fluorophore's excitation wavelength to a focal line on the surface of the photonic crystal such that the focal line is substantially parallel to the grating direction and can detect fluorescence radiation emitted by the fluorophore in response to the incident light. To provide for fluorescence enhancement, the excitation wavelength and/or emission wavelength of the fluorophore can couple to an optical resonance of the photonic crystal.

Abstract: A photonic crystal substrate exhibiting resonant enhancement of multiple fluorophores has been demonstrated. The device, which can be fabricated uniformly from plastic materials over a ˜3×5 in2 surface area by nanoreplica molding, features a 1-D periodic grating structure which utilizes two distinct resonant modes to enhance electric field stimulation of a first dye excited by a first laser (e.g., ?=632.8 nm laser exciting cyanine-5) and a second dye excited by a second laser (e.g., ?=532 nm laser exciting cyanine-3). The first and second lasers could be replaced by a single variable wavelength (tunable) laser. Resonant coupling of the laser excitation to the photonic crystal surface is obtained for each wavelength at a distinct incident angle ?. The photonic crystal is capable of amplifying the output of any fluorescent dye with an excitation wavelength in a given wavelength range (e.g., the range 532 nm<?<660 nm) by selection of an appropriate incident angle.

Abstract: A photonic crystal substrate exhibiting resonant enhancement of multiple fluorophores has been demonstrated. The device, which can be fabricated uniformly from plastic materials over a ˜3×5 in2 surface area by nanoreplica molding, features a 1-D periodic grating structure which utilizes two distinct resonant modes to enhance electric field stimulation of a first dye excited by a first laser (e.g., ?=632.8 nm laser exciting cyanine-5) and a second dye excited by a second laser (e.g., ?=532 nm laser exciting cyanine-3). The first and second lasers could be replaced by a single variable wavelength (tunable) laser. Resonant coupling of the laser excitation to the photonic crystal surface is obtained for each wavelength at a distinct incident angle ?. The photonic crystal is capable of amplifying the output of any fluorescent dye with an excitation wavelength in a given wavelength range (e.g., the range 532 nm <?<660 nm) by selection of an appropriate incident angle.